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(PDF) Rare earth phosphate powders RePO4·nH2O (Re=La, Ce or Y)—Part I. Synthesis and characterization
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window.loswp.willEdgeCache = false; window.loswp.work = {"work":{"id":16269480,"created_at":"2015-09-28T09:42:00.155-07:00","from_world_paper_id":142333462,"updated_at":"2024-11-15T16:05:43.398-08:00","_data":{"grobid_abstract":"Rare earth phosphate powders (Re=La, Ce or Y) were synthesized from an aqueous precipitation method. The effect of temperature, pH, ripening time and Re/P mole ratio of the initial reagents was investigated. Elementary analysis, surface area and bulk density measurements, FT-infrared spectroscopy, X-ray diffraction and SEM observations were performed to characterize the precipitates. All the powders of hydrated form (La, Ce or Y)PO 4 Á nH 2 O were single phase. They exhibited a Re/P mole ratio smaller than 1 due to residual H 3 PO 4 adsorbed at their surface. A unit formula could be written as RePO 4 Á nH 2 O Á (H 3 PO 4 ) x with nE0:5 (for Re=La or Ce) or n ¼ 2 (for Re=Y) and xo0:1: High-temperature thermogravimetry was necessary to detect these residuals and insure the purity of the powders. The precipitation of lanthanum or cerium phosphates was slow, resulting in powders with a high specific surface. The precipitation of yttrium phosphate was faster and significant crystal growth occurred during the ripening, which resulted in a whisker-like morphology and a very low specific surface.","publication_date":"2004,,","publication_name":"Journal of Solid State Chemistry","grobid_abstract_attachment_id":"42593811"},"document_type":"paper","pre_hit_view_count_baseline":null,"quality":"high","language":"en","title":"Rare earth phosphate powders RePO4·nH2O (Re=La, Ce or Y)—Part I. Synthesis and characterization","broadcastable":true,"draft":null,"has_indexable_attachment":true,"indexable":true}}["work"]; window.loswp.workCoauthors = [35362822]; window.loswp.locale = "en"; window.loswp.countryCode = "SG"; window.loswp.cwvAbTestBucket = ""; window.loswp.designVariant = "ds_vanilla"; window.loswp.fullPageMobileSutdModalVariant = "full_page_mobile_sutd_modal"; window.loswp.useOptimizedScribd4genScript = false; window.loginModal = {}; window.loginModal.appleClientId = 'edu.academia.applesignon'; window.userInChina = "false";</script><script defer="" src="https://accounts.google.com/gsi/client"></script><div class="ds-loswp-container"><div class="ds-work-card--grid-container"><div class="ds-work-card--container js-loswp-work-card"><div class="ds-work-card--cover"><div class="ds-work-cover--wrapper"><div class="ds-work-cover--container"><button class="ds-work-cover--clickable js-swp-download-button" data-signup-modal="{"location":"swp-splash-paper-cover","attachmentId":42593811,"attachmentType":"pdf"}"><img alt="First page of “Rare earth phosphate powders RePO4·nH2O (Re=La, Ce or Y)—Part I. Synthesis and characterization”" class="ds-work-cover--cover-thumbnail" src="https://0.academia-photos.com/attachment_thumbnails/42593811/mini_magick20190217-31970-1x68sby.png?1550430353" /><img alt="PDF Icon" class="ds-work-cover--file-icon" src="//a.academia-assets.com/images/single_work_splash/adobe_icon.svg" /><div class="ds-work-cover--hover-container"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span><p>Download Free PDF</p></div><div class="ds-work-cover--ribbon-container">Download Free PDF</div><div class="ds-work-cover--ribbon-triangle"></div></button></div></div></div><div class="ds-work-card--work-information"><h1 class="ds-work-card--work-title">Rare earth phosphate powders RePO4·nH2O (Re=La, Ce or Y)—Part I. Synthesis and characterization</h1><div class="ds-work-card--work-authors ds-work-card--detail"><a class="ds-work-card--author js-wsj-grid-card-author ds2-5-body-md ds2-5-body-link" data-author-id="35362822" href="https://independent.academia.edu/DidierBernacheassollant"><img alt="Profile image of Didier Bernache-assollant" class="ds-work-card--author-avatar" src="//a.academia-assets.com/images/s65_no_pic.png" />Didier Bernache-assollant</a></div><div class="ds-work-card--detail"><p class="ds-work-card--detail ds2-5-body-sm">2004, Journal of Solid State Chemistry</p><div class="ds-work-card--work-metadata"><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">visibility</span><p class="ds2-5-body-sm" id="work-metadata-view-count">…</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">description</span><p class="ds2-5-body-sm">10 pages</p></div><div class="ds-work-card--work-metadata__stat"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">link</span><p class="ds2-5-body-sm">1 file</p></div></div><script>(async () => { const workId = 16269480; const worksViewsPath = "/v0/works/views?subdomain_param=api&work_ids%5B%5D=16269480"; const getWorkViews = async (workId) => { const response = await fetch(worksViewsPath); if (!response.ok) { throw new Error('Failed to load work views'); } const data = await response.json(); return data.views[workId]; }; // Get the view count for the work - we send this immediately rather than waiting for // the DOM to load, so it can be available as soon as possible (but without holding up // the backend or other resource requests, because it's a bit expensive and not critical). const viewCount = await getWorkViews(workId); const updateViewCount = (viewCount) => { try { const viewCountNumber = parseInt(viewCount, 10); if (viewCountNumber === 0) { // Remove the whole views element if there are zero views. document.getElementById('work-metadata-view-count')?.parentNode?.remove(); return; } const commaizedViewCount = viewCountNumber.toLocaleString(); const viewCountBody = document.getElementById('work-metadata-view-count'); if (!viewCountBody) { throw new Error('Failed to find work views element'); } viewCountBody.textContent = `${commaizedViewCount} views`; } catch (error) { // Remove the whole views element if there was some issue parsing. document.getElementById('work-metadata-view-count')?.parentNode?.remove(); throw new Error(`Failed to parse view count: ${viewCount}`, error); } }; // If the DOM is still loading, wait for it to be ready before updating the view count. if (document.readyState === "loading") { document.addEventListener('DOMContentLoaded', () => { updateViewCount(viewCount); }); // Otherwise, just update it immediately. } else { updateViewCount(viewCount); } })();</script></div><p class="ds-work-card--work-abstract ds-work-card--detail ds2-5-body-md">Rare earth phosphate powders (Re=La, Ce or Y) were synthesized from an aqueous precipitation method. The effect of temperature, pH, ripening time and Re/P mole ratio of the initial reagents was investigated. Elementary analysis, surface area and bulk density measurements, FT-infrared spectroscopy, X-ray diffraction and SEM observations were performed to characterize the precipitates. All the powders of hydrated form (La, Ce or Y)PO 4 Á nH 2 O were single phase. They exhibited a Re/P mole ratio smaller than 1 due to residual H 3 PO 4 adsorbed at their surface. A unit formula could be written as RePO 4 Á nH 2 O Á (H 3 PO 4 ) x with nE0:5 (for Re=La or Ce) or n ¼ 2 (for Re=Y) and xo0:1: High-temperature thermogravimetry was necessary to detect these residuals and insure the purity of the powders. The precipitation of lanthanum or cerium phosphates was slow, resulting in powders with a high specific surface. The precipitation of yttrium phosphate was faster and significant crystal growth occurred during the ripening, which resulted in a whisker-like morphology and a very low specific surface.</p><div class="ds-work-card--button-container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--work-card","attachmentId":42593811,"attachmentType":"pdf","workUrl":"https://www.academia.edu/16269480/Rare_earth_phosphate_powders_RePO4_nH2O_Re_La_Ce_or_Y_Part_I_Synthesis_and_characterization"}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--work-card","attachmentId":42593811,"attachmentType":"pdf","workUrl":"https://www.academia.edu/16269480/Rare_earth_phosphate_powders_RePO4_nH2O_Re_La_Ce_or_Y_Part_I_Synthesis_and_characterization"}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div><div class="ds-signup-banner-trigger-container"><div class="ds-signup-banner-trigger ds-signup-banner-trigger-premium-marketing"></div></div><div class="ds-signup-banner ds-signup-banner-premium-marketing"><div id="ds-signup-banner-close-button"><button class="ds2-5-button ds2-5-button--secondary ds2-5-button--inverse"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">close</span></button></div><div class="premium-banner-content"><div class="left"><img src="//a.academia-assets.com/images/academia-logo-capital-white.svg" /><span>Get access to the world's latest research</span></div><div class="right"><div class="card free"><div class="header">Free</div><div class="feature-list"><div class="feature"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">check</span><span>Download one paper at a time</span></div><div class="feature"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">check</span><span>Save papers to bookmarks</span></div><div class="feature"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">check</span><span>Basic search</span></div></div><button class="ds2-5-button ds2-5-button--secondary ds2-5-button--small ds2-5-button--inverse ds2-5-button--full-width js-swp-download-button" data-signup-modal="{"location":"premium-banner-desktop-free"}">Sign up for free</button></div><div class="card premium"><div class="pill">Recommended</div><div class="header premium">Premium</div><div class="feature-list"><div class="feature"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">check</span><span>Get highly curated PDF packages</span></div><div class="feature"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">check</span><span>Track your impact with Mentions</span></div><div class="feature"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">check</span><span>Access advanced search filters</span></div><div class="feature"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">check</span><span>Support Academia’s mission</span></div><div class="feature"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">check</span><span>Create your personal website</span></div></div><button class="ds2-5-button ds2-5-button--small ds2-5-button--inverse ds2-5-button--full-width js-swp-download-button" data-signup-modal="{"location":"premium-banner-desktop-upgrade","submitText":"Try Premium for $1"}">Try Premium for $1</button></div></div></div></div><script>(() => { // Set up signup banner show/hide behavior: // 1. 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These compounds were characterized by X-ray diffraction and chemical analysis. The best crystallinity was obtained for samples heat-treated at 660-750°C in air during 24 h, in which the K content was determined to be near 1% (wt). A Rietveld refinement of these hexagonal orthophosphates was performed in the same conditions as used for the hexagonal holmium orthophosphate reported earlier by us (rhabdophane-type, space group P6222). It indicated that a part of KOH is incorporated in the hexagonal form and that the other part remains in an amorphous form. Between 800 and 1200°C the two forms gradually transform into a zircon-type LnP04 phase for Ln = Tb-Lu, Y and a monazite-type LnP04 phase for Ln = Eu, Gd. The infi'ared spectra for all these compounds were obtained by the KBr disk method.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Synthesis, crystal chemistry and physical study of a new series of rare earth phosphates with specific open structure","attachmentId":76241990,"attachmentType":"pdf","work_url":"https://www.academia.edu/64004965/Synthesis_crystal_chemistry_and_physical_study_of_a_new_series_of_rare_earth_phosphates_with_specific_open_structure","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/64004965/Synthesis_crystal_chemistry_and_physical_study_of_a_new_series_of_rare_earth_phosphates_with_specific_open_structure"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="1" data-entity-id="78294461" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/78294461/Sol_Gel_Lanthanum_Phosphate_A_Versatile_Ceramic_Material_for_Diverse_Functional_Applications">Sol-Gel Lanthanum Phosphate: A Versatile Ceramic Material for Diverse Functional Applications</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="33104877" href="https://independent.academia.edu/UHareesh">U. Hareesh</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Advances in Sol-Gel Derived Materials and Technologies, 2017</p><p class="ds-related-work--abstract ds2-5-body-sm">Synthesis of Lanthanum Phosphate (LaPO 4 )-Literature Review Lanthanum phosphate synthesis gathered attention after Hikichi et al. [1] established the phase stability in 1987. Considerable number of reports are available on the synthesis of lanthanum phosphate employing techniques like solid-state synthesis, precipitation, hydrothermal, solid-liquid reaction, colloidal, microwave assisted, ultrasonication and sol-gel [1 -25]. The starting compounds in nearly all the above techniques are rare earth nitrates, carbonates or acetates and the phosphates obtained are in submicron or nanometre range. Ruigang et al synthesized lanthanum phosphate powders by direct solid-liquid reaction of lanthanum oxide and phosphoric acid at the La: P ratio of 1:1. Phase pure and fine grain-sized LaPO 4 powders could be obtained by calcining the as-received powders at temperature higher than 600 °C. Lanthanum oxide dissolved in dilute phosphoric acid in the La to P atomic ratio 1:1</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Sol-Gel Lanthanum Phosphate: A Versatile Ceramic Material for Diverse Functional Applications","attachmentId":85392158,"attachmentType":"pdf","work_url":"https://www.academia.edu/78294461/Sol_Gel_Lanthanum_Phosphate_A_Versatile_Ceramic_Material_for_Diverse_Functional_Applications","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/78294461/Sol_Gel_Lanthanum_Phosphate_A_Versatile_Ceramic_Material_for_Diverse_Functional_Applications"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="2" data-entity-id="11374746" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/11374746/Synthesis_and_characterization_of_hydrated_rare_earth_acid_diphosphates_LnHP2O7_3_5H2O_Ln_rare_earth_element_">Synthesis and characterization of hydrated rare-earth acid diphosphates LnHP2O7.3.5H2O (Ln=rare-earth element)</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="9882567" href="https://csic.academia.edu/JuanEIglesias">Juan E Iglesias</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Materials Chemistry, 10, 1973-1978 (2000)</p><p class="ds-related-work--abstract ds2-5-body-sm">Hydrated lanthanum acid diphosphates, of the formula LnHP 2 0 7 ·3.5H 2 0 , have been prepa red from acidic LaC1 3 and Na 4 P 2 0 7 solutions (pH= l), and characterized by XRD, IR and NMR spectroscopic techniques. In the series Ln = La-Sm, these phosphates crystallize in the orthorhombic system (Type I) but in the series Sm-Yb, they crystallize in the triclinic system (Type II). In the case of Sm diphosphates both structures can be obtained depending on the synthesis conditions. The diphosphate character of the compounds was assessed by IR and NMR and two environments, namely Po¡ -and HPo¡-, were identitied by 31 P MAS spectroscopy. Finally, a different distribution of OH and water was deduced from NMR and IR spectroscopic analysis of the two series of diphosphates.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Synthesis and characterization of hydrated rare-earth acid diphosphates LnHP2O7.3.5H2O (Ln=rare-earth element)","attachmentId":36940249,"attachmentType":"pdf","work_url":"https://www.academia.edu/11374746/Synthesis_and_characterization_of_hydrated_rare_earth_acid_diphosphates_LnHP2O7_3_5H2O_Ln_rare_earth_element_","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/11374746/Synthesis_and_characterization_of_hydrated_rare_earth_acid_diphosphates_LnHP2O7_3_5H2O_Ln_rare_earth_element_"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="3" data-entity-id="118303527" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/118303527/Novel_monazite_type_rare_earth_based_phosphates_ARP3O10_A_Ba_or_Ca_R_La_Ce_or_Sm_Studies_on_their_preparation_structure_microstructure_and_dielectric_properties">Novel monazite type rare earth based phosphates ARP3O10 (A=Ba or Ca; R=La, Ce or Sm) — Studies on their preparation, structure, microstructure and dielectric properties</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="300459980" href="https://independent.academia.edu/RavindranNair13">Ravindran Nair</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Materials Letters, 2006</p><p class="ds-related-work--abstract ds2-5-body-sm">This paper presents the results of the investigations carried out on the preparation, structure and properties of certain novel rare earth based phosphate compounds such as BaSmP 3 O 10 , CaSmP 3 O 10 , BaCeP 3 O 10 , CaCeP 3 O 10 , BaLaP 3 O 10 , and CaCeP 3 O 10. The phase identification of these phosphates is done by powder X-ray diffraction (XRD) which clearly shows the formation of monoclinic monazite type structure. The grain morphology of the compounds is studied by Scanning Electron Microscope (SEM). All the compounds except BaLaP 3 O 10 show well-grown grains. BaLaP 3 O 10 is unstable when kept in air for a few days. Dielectric properties of all the new phosphates have been measured as a function of frequency at room temperature. It is seen that these new rare earth phosphates have low dielectric constant and moderate dissipation factor.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Novel monazite type rare earth based phosphates ARP3O10 (A=Ba or Ca; R=La, Ce or Sm) — Studies on their preparation, structure, microstructure and dielectric properties","attachmentId":113962913,"attachmentType":"pdf","work_url":"https://www.academia.edu/118303527/Novel_monazite_type_rare_earth_based_phosphates_ARP3O10_A_Ba_or_Ca_R_La_Ce_or_Sm_Studies_on_their_preparation_structure_microstructure_and_dielectric_properties","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/118303527/Novel_monazite_type_rare_earth_based_phosphates_ARP3O10_A_Ba_or_Ca_R_La_Ce_or_Sm_Studies_on_their_preparation_structure_microstructure_and_dielectric_properties"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="4" data-entity-id="59903565" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/59903565/High_surface_area_neodymium_phosphate_nano_particles_by_modified_aqueous_sol_gel_method">High surface area neodymium phosphate nano particles by modified aqueous sol–gel method</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="117279463" href="https://independent.academia.edu/KRISHNAWARRIER">KRISHNA WARRIER</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Materials Research Bulletin, 2011</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"High surface area neodymium phosphate nano particles by modified aqueous sol–gel method","attachmentId":73589324,"attachmentType":"pdf","work_url":"https://www.academia.edu/59903565/High_surface_area_neodymium_phosphate_nano_particles_by_modified_aqueous_sol_gel_method","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/59903565/High_surface_area_neodymium_phosphate_nano_particles_by_modified_aqueous_sol_gel_method"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="5" data-entity-id="50816914" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/50816914/Synthesis_and_characterization_of_neodymium_phosphate_powder_resulted_from_neodymium_loaded_HDEHP_organic_solutions_by_a_stripping_precipitation_process_using_a_Lewis_type_cell">Synthesis and characterization of neodymium phosphate powder resulted from neodymium loaded-HDEHP organic solutions by a stripping–precipitation process using a Lewis type cell</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="45817972" href="https://eaea-sci.academia.edu/YasserElNadi">Yasser El-Nadi</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Separation and Purification Technology, 2011</p><p class="ds-related-work--abstract ds2-5-body-sm">The solvent extraction process of neodymium(III) from aqueous solution by di(2-ethylhexyl) phosphoric acid (HDEHP) in kerosene has been performed as a first step to accomplish the homogeneous precipitation of neodymium phosphate by stripping from an organic metal loaded HDEHP solution using phosphoric acid solutions. In this study, stripping-precipitation approach was proposed to synthesize powders of neodymium phosphate using a modified Lewis cell. The effects of extractant, organic phase, neodymium concentration, stripping phase, phosphoric acid content and temperature were separately investigated. The neodymium precipitate was characterized by X-ray diffractometry, scanning electron microscopy, particle size measurement, thermogravimetric analysis and infrared spectroscopy. The results showed that the powder precipitated with 3 M H 3 PO 4 showed more regular and slightly larger particles than those obtained by 5 M H 3 PO 4 while the precipitate with 8 M H 3 PO 4 gave highly agglomerated particles. Increasing the HDEHP concentration from 0.25 M to 0.75 M gave an increase of the particle size of the precipitate. As the temperature increases (10-45 • C), the formed particles appeared to be more crystalline and smaller in size.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Synthesis and characterization of neodymium phosphate powder resulted from neodymium loaded-HDEHP organic solutions by a stripping–precipitation process using a Lewis type cell","attachmentId":68682996,"attachmentType":"pdf","work_url":"https://www.academia.edu/50816914/Synthesis_and_characterization_of_neodymium_phosphate_powder_resulted_from_neodymium_loaded_HDEHP_organic_solutions_by_a_stripping_precipitation_process_using_a_Lewis_type_cell","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/50816914/Synthesis_and_characterization_of_neodymium_phosphate_powder_resulted_from_neodymium_loaded_HDEHP_organic_solutions_by_a_stripping_precipitation_process_using_a_Lewis_type_cell"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="6" data-entity-id="39343714" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/39343714/Thermodynamics_and_stability_of_rhabdophanes_hydrated_rare_earth_phosphates_REPO4_nH2O">Thermodynamics and stability of rhabdophanes, hydrated rare earth phosphates REPO4·nH2O</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="47641859" href="https://kit.academia.edu/AnnaShelyug">Anna Shelyug</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Frontiers in Chemistry, 2018</p><p class="ds-related-work--abstract ds2-5-body-sm">Rare earth phosphates comprise a large family of compounds proposed as possible nuclear waste disposal forms. We report structural and thermodynamic properties of a series of rare earth rhabdophanes and monazites. The water content of the rhabdophanes, including both adsorbed and structural water, decreases linearly with increase in ionic radius of the rare earth. The energetics of the transformation of rhabdophane to monazite plus water and the enthalpy of formation of rhabdophane from the constituent oxides was determined by high temperature drop solution calorimetry. The former varies linearly with the ionic radius of the lanthanide, except for cerium. By combining the enthalpy of formation determined by high temperature drop solution calorimetry and the free energy of formation determined previously by solubility experiments, a complete set of thermodynamic data was derived for the rhabdophanes. They are thermodynamically metastable with respect to the corresponding monazites plus water at all temperatures under ambient pressure conditions. This conclusion strengthens the case for monazites being an excellent nuclear waste form.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Thermodynamics and stability of rhabdophanes, hydrated rare earth phosphates REPO4·nH2O","attachmentId":59484527,"attachmentType":"pdf","work_url":"https://www.academia.edu/39343714/Thermodynamics_and_stability_of_rhabdophanes_hydrated_rare_earth_phosphates_REPO4_nH2O","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/39343714/Thermodynamics_and_stability_of_rhabdophanes_hydrated_rare_earth_phosphates_REPO4_nH2O"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="7" data-entity-id="27858149" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/27858149/Praseodymium_and_neodymium_phosphates_Ca9Ln_PO4_7_of_whitlockite_structure_Preparation_of_a_ceramic_with_a_high_relative_density">Praseodymium and neodymium phosphates Ca9Ln(PO4) 7 of whitlockite structure. Preparation of a ceramic with a high relative density</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="52203635" href="https://unn-ru.academia.edu/MBoldin">Maksim S Boldin</a></div><p class="ds-related-work--metadata ds2-5-body-xs">2014</p><p class="ds-related-work--abstract ds2-5-body-sm">Praseodymium and neodymium phosphates Ca 9 Ln(PO 4 ) 7 of the whitlockite structure were synthesized in the form of powders via solid-phase reactions at high temperatures and in the form of ceramics using the two-step pressing + sintering process and one-step high-rate spark plasma sputtering (SPS) procedure. According to X-ray diffraction data, the phosphates were structural analogs of calcium phosphate, namely, of its low-temperature modification β-Ca 3 (PO 4 ) 2 , space group R3c. The particle size in the powders was 80-110 nm. The relative densities of the ceramics reached 99% when using SPS. The optimum conditions were found for obtaining high-density ceramics containing Pr and Nd. Their mechanical characteristics (microhardness, cracking resistance) were determined, and the microstructure was characterized.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Praseodymium and neodymium phosphates Ca9Ln(PO4) 7 of whitlockite structure. Preparation of a ceramic with a high relative density","attachmentId":48142744,"attachmentType":"pdf","work_url":"https://www.academia.edu/27858149/Praseodymium_and_neodymium_phosphates_Ca9Ln_PO4_7_of_whitlockite_structure_Preparation_of_a_ceramic_with_a_high_relative_density","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/27858149/Praseodymium_and_neodymium_phosphates_Ca9Ln_PO4_7_of_whitlockite_structure_Preparation_of_a_ceramic_with_a_high_relative_density"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="8" data-entity-id="16069961" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/16069961/INFLUENCE_OF_PRECIPITATION_CONDITIONS_ON_THE_CRYSTALLISATION_AND_MORPHOLOGY_OF_EUROPIUM_DOPED_LANTHANUM_ORTHOPHOSPHATE">INFLUENCE OF PRECIPITATION CONDITIONS ON THE CRYSTALLISATION AND MORPHOLOGY OF EUROPIUM-DOPED LANTHANUM ORTHOPHOSPHATE</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="20067291" href="https://polytechnicinstiturebucharestromania.academia.edu/CMatei">Cristian Matei</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="35199198" href="https://independent.academia.edu/StefaniaStoleriu">Stefania Stoleriu</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="35238800" href="https://independent.academia.edu/AlexandraCarabat">Alexandra Carabat</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Revista Romana de materiale = Romanian journal of materials = RRM</p><p class="ds-related-work--abstract ds2-5-body-sm">Eu-doped lanthanum orthophosphate samples were prepared by precipitation in aqueous solution of lanthanide ions using different precipitation agents or applying a hydrothermal treatment. The influence of the precipitation parameters on the structure and morphology of La0.95Eu0.05PO4 was studied analyzing the samples by XRD, FM and SEM. La0.95Eu0.05PO4 synthesized by precipitation method presented rhabdophane structure, whereas the hydrothermal method leads to rhabdophane phase when H3PO4 was added in the synthesis and a mixture of rhabdophane and monazite phases when KH2PO4 or Na2HPO4 were used. The annealing step at 550 degrees C/lh led to the monazite phase stabilization. The luminescent properties of La0.95Eu0.05PO4 samples were investigated.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"INFLUENCE OF PRECIPITATION CONDITIONS ON THE CRYSTALLISATION AND MORPHOLOGY OF EUROPIUM-DOPED LANTHANUM ORTHOPHOSPHATE","attachmentId":38863367,"attachmentType":"pdf","work_url":"https://www.academia.edu/16069961/INFLUENCE_OF_PRECIPITATION_CONDITIONS_ON_THE_CRYSTALLISATION_AND_MORPHOLOGY_OF_EUROPIUM_DOPED_LANTHANUM_ORTHOPHOSPHATE","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/16069961/INFLUENCE_OF_PRECIPITATION_CONDITIONS_ON_THE_CRYSTALLISATION_AND_MORPHOLOGY_OF_EUROPIUM_DOPED_LANTHANUM_ORTHOPHOSPHATE"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="9" data-entity-id="21093671" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/21093671/Synthesis_spectroscopic_and_luminescent_properties_of_nanosized_powders_of_yttrium_phosphates_doped_with_Er3_ions">Synthesis, spectroscopic and luminescent properties of nanosized powders of yttrium phosphates doped with Er3+ ions</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="52178663" href="https://mrsu.academia.edu/SvetlanaKhrushchalina">Svetlana A Khrushchalina (Antoshkina)</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="42714165" href="https://independent.academia.edu/OlgaGaitko">Olga Gaitko</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="6644376" href="https://ut-ee.academia.edu/AlexanderVanetsev">Alexander Vanetsev</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Nanoparticle Research, 2014</p><p class="ds-related-work--abstract ds2-5-body-sm">Here, we report synthesis of pure crystalline nanopowders of yttrium orthophosphate Y 0.95 Er 0.05 PO 4 with xenotime-type structure and hydrate of yttrium orthophosphate Y 0.95 Er 0.05 PO 4 Á0.8H 2 O with rhabdophane-type structure using microwave-hydrothermal treatment of freshly precipitated gels. To establish phase composition of the synthesized nanopowders, we have carried out XRD analysis. Also, we have investigated their morphology by means of TEM and SAXS. We have registered scattered reflection spectra for synthesized Y 0.95 Er 0.05 PO 4 and Y 0.95 Er 0.05 PO 4 Á0.8H 2 O powders. Also, we have obtained luminescent spectra of these nanocrystalline samples for 4 I 13/2 ? 4 I 15/2 transition of Er 3? ion with excitation of 4 I 11/2 level. We have proposed the mode of application of nanocrystalline powders Y 0.95 Er 0.05 PO 4 and Y 0.95 Er 0.05 PO 4 Á0.8H 2 O for the development of composite materials based on polymer capsules that are being used in targeted drug delivery.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Synthesis, spectroscopic and luminescent properties of nanosized powders of yttrium phosphates doped with Er3+ ions","attachmentId":41711637,"attachmentType":"pdf","work_url":"https://www.academia.edu/21093671/Synthesis_spectroscopic_and_luminescent_properties_of_nanosized_powders_of_yttrium_phosphates_doped_with_Er3_ions","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/21093671/Synthesis_spectroscopic_and_luminescent_properties_of_nanosized_powders_of_yttrium_phosphates_doped_with_Er3_ions"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div></div></div><div class="ds-sticky-ctas--wrapper js-loswp-sticky-ctas hidden"><div class="ds-sticky-ctas--grid-container"><div class="ds-sticky-ctas--container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--sticky-ctas","attachmentId":42593811,"attachmentType":"pdf","workUrl":null}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--sticky-ctas","attachmentId":42593811,"attachmentType":"pdf","workUrl":null}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div></div></div><div class="ds-below-fold--grid-container"><div class="ds-work--container js-loswp-embedded-document"><div class="attachment_preview" data-attachment="Attachment_42593811" style="display: none"><div class="js-scribd-document-container"><div class="scribd--document-loading js-scribd-document-loader" style="display: block;"><img alt="Loading..." src="//a.academia-assets.com/images/loaders/paper-load.gif" /><p>Loading Preview</p></div></div><div style="text-align: center;"><div class="scribd--no-preview-alert js-preview-unavailable"><p>Sorry, preview is currently unavailable. 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Ivashkevich</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Phosphorus Research Bulletin, 2001</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"CRYSTALLIZATION OF T1PO4^|^middot;nH2O with n^|^le;0.5","attachmentId":88663063,"attachmentType":"pdf","work_url":"https://www.academia.edu/83255958/CRYSTALLIZATION_OF_T1PO4_middot_nH2O_with_n_le_0_5","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" href="https://www.academia.edu/83255958/CRYSTALLIZATION_OF_T1PO4_middot_nH2O_with_n_le_0_5"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" 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