CINXE.COM

<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0">  <script async src="https://www.googletagmanager.com/gtag/js?id=G-ZK1E8XKBLT"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-ZK1E8XKBLT'); </script>  <title>WebElements Periodic Table » Actinium » crystal structures</title> <meta name="Description" content="This WebElements periodic table page contains crystal structures for the element actinium"> <meta name="keywords" content="actinium, crystal, crystallography, solid state, structure, crystal structure, PDB, Brookhaven, chemistry, periodic table, periodic chart, periodic system, chemical elements, chemical, webelements, web-elements, Sheffield, science, element, elements, metal, gas, atoms"> <link rel="stylesheet" href="../_newlands/pure/pure-min.css" type="text/css"> <link rel="stylesheet" href="../_newlands/pure/grids-responsive-min.css" type="text/css"> <link rel="stylesheet" href="../_newlands/pure-layout-side-menu/css/layouts/side-menu.css" type="text/css"> <link rel="stylesheet" href="../_newlands/css/webelements.css?parameter=1"> <meta name="author" content="Prof Mark Winter, University of Sheffield"> <meta name="copyright" content="Copyright 2024 Prof Mark Winter"> <link rel="index" href="./"> <link rel="shortcut icon" href="../favicon.png"> </head> <body> <div id="layout">  <a href="#menu" id="menuLink" class="menu-link">  <span></span> </a>  <div id="menu"> <div class="pure-menu"> <ul class="pure-menu-list"> <li class="pure-menu-item logo"><a href="../" class="pure-menu-link"><img height="30" src="../_media/icons/logo_60.png" alt="WebElements logo" /></a></li> <li class="pure-menu-item v"> <div id="NavigationPanel"> <table style="nav_panel"> <tr> <th class="navpanel-s"><a title="barium" href="../barium/crystal_structure.html">Ba</a></th> <th class="navpanel-f"><a title="lanthanum" href="../lanthanum/crystal_structure.html">La</a></th> <th class="navpanel-f"><a title="cerium" href="../cerium/crystal_structure.html">Ce</a></th> </tr> <tr> <th class="navpanel-s"><a title="radium" href="../radium/crystal_structure.html">Ra</a></th> <th class="navpanel-f">Ac</th> <th class="navpanel-f"><a title="thorium" href="../thorium/crystal_structure.html">Th</a></th> </tr> <tr> <th class="navpanel-v"> </th> <th class="navpanel-v"> </th> <th class="navpanel-v"> </th> </tr> </table> </div> </li>  <li class="pure-menu-item v"> <div class="element_select_centre"><a class="imagelink" title="Switch to a different element from here" href="../index.html"><img class="" src="../_media/locs/Ac-loc.png" alt="Actinium location" /></a> </div> </li>  <li class="pure-menu-item f"><a class="pure-menu-link f" href="../actinium/crystal_structure.html">Actinium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../aluminium/crystal_structure.html">Aluminium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../aluminium/crystal_structure.html">Aluminum</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../americium/crystal_structure.html">Americium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../antimony/crystal_structure.html">Antimony</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../argon/crystal_structure.html">Argon</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../arsenic/crystal_structure.html">Arsenic</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../astatine/crystal_structure.html">Astatine ☢</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../barium/crystal_structure.html">Barium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../berkelium/crystal_structure.html">Berkelium ☢</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../beryllium/crystal_structure.html">Beryllium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../bismuth/crystal_structure.html">Bismuth</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../bohrium/crystal_structure.html">Bohrium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../boron/crystal_structure.html">Boron</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../bromine/crystal_structure.html">Bromine</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../cadmium/crystal_structure.html">Cadmium</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../caesium/crystal_structure.html">Caesium</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../calcium/crystal_structure.html">Calcium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../californium/crystal_structure.html">Californium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../carbon/crystal_structure.html">Carbon</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../cerium/crystal_structure.html">Cerium</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../caesium/crystal_structure.html">Cesium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../chlorine/crystal_structure.html">Chlorine</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../chromium/crystal_structure.html">Chromium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../cobalt/crystal_structure.html">Cobalt</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../copernicium/crystal_structure.html">Copernicium ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../copper/crystal_structure.html">Copper</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../curium/crystal_structure.html">Curium ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../darmstadtium/crystal_structure.html">Darmstadtium ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../dubnium/crystal_structure.html">Dubnium ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../dysprosium/crystal_structure.html">Dysprosium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../einsteinium/crystal_structure.html">Einsteinium ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../erbium/crystal_structure.html">Erbium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../europium/crystal_structure.html">Europium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../fermium/crystal_structure.html">Fermium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../flerovium/crystal_structure.html">Flerovium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../fluorine/crystal_structure.html">Fluorine</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../francium/crystal_structure.html">Francium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../gadolinium/crystal_structure.html">Gadolinium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../gallium/crystal_structure.html">Gallium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../germanium/crystal_structure.html">Germanium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../gold/crystal_structure.html">Gold</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../hafnium/crystal_structure.html">Hafnium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../hassium/crystal_structure.html">Hassium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../helium/crystal_structure.html">Helium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../holmium/crystal_structure.html">Holmium</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../hydrogen/crystal_structure.html">Hydrogen</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../indium/crystal_structure.html">Indium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../iodine/crystal_structure.html">Iodine</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../iridium/crystal_structure.html">Iridium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../iron/crystal_structure.html">Iron</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../krypton/crystal_structure.html">Krypton</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../lanthanum/crystal_structure.html">Lanthanum</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../lawrencium/crystal_structure.html">Lawrencium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../lead/crystal_structure.html">Lead</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../lithium/crystal_structure.html">Lithium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../livermorium/crystal_structure.html">Livermorium ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../lutetium/crystal_structure.html">Lutetium</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../magnesium/crystal_structure.html">Magnesium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../manganese/crystal_structure.html">Manganese</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../meitnerium/crystal_structure.html">Meitnerium ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../mendelevium/crystal_structure.html">Mendelevium ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../mercury/crystal_structure.html">Mercury</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../molybdenum/crystal_structure.html">Molybdenum</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../moscovium/crystal_structure.html">Moscovium ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../neodymium/crystal_structure.html">Neodymium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../neon/crystal_structure.html">Neon</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../neptunium/crystal_structure.html">Neptunium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../nickel/crystal_structure.html">Nickel</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../nihonium/crystal_structure.html">Nihonium ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../niobium/crystal_structure.html">Niobium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../nitrogen/crystal_structure.html">Nitrogen</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../nobelium/crystal_structure.html">Nobelium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../oganesson/crystal_structure.html">Oganesson ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../osmium/crystal_structure.html">Osmium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../oxygen/crystal_structure.html">Oxygen</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../palladium/crystal_structure.html">Palladium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../phosphorus/crystal_structure.html">Phosphorus</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../platinum/crystal_structure.html">Platinum</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../plutonium/crystal_structure.html">Plutonium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../polonium/crystal_structure.html">Polonium</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../potassium/crystal_structure.html">Potassium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../praseodymium/crystal_structure.html">Praseodymium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../promethium/crystal_structure.html">Promethium ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../protactinium/crystal_structure.html">Protactinium ☢</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../radium/crystal_structure.html">Radium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../radon/crystal_structure.html">Radon ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../rhenium/crystal_structure.html">Rhenium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../rhodium/crystal_structure.html">Rhodium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../roentgenium/crystal_structure.html">Roentgenium ☢</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../rubidium/crystal_structure.html">Rubidium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../ruthenium/crystal_structure.html">Ruthenium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../rutherfordium/crystal_structure.html">Rutherfordium ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../samarium/crystal_structure.html">Samarium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../scandium/crystal_structure.html">Scandium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../seaborgium/crystal_structure.html">Seaborgium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../selenium/crystal_structure.html">Selenium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../silicon/crystal_structure.html">Silicon</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../silver/crystal_structure.html">Silver</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../sodium/crystal_structure.html">Sodium</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../strontium/crystal_structure.html">Strontium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../sulfur/crystal_structure.html">Sulfur</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../sulfur/crystal_structure.html">Sulphur</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../tantalum/crystal_structure.html">Tantalum</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../technetium/crystal_structure.html">Technetium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../tellurium/crystal_structure.html">Tellurium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../tennessine/crystal_structure.html">Tennessine ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../terbium/crystal_structure.html">Terbium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../thallium/crystal_structure.html">Thallium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../thorium/crystal_structure.html">Thorium ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../thulium/crystal_structure.html">Thulium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../tin/crystal_structure.html">Tin</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../titanium/crystal_structure.html">Titanium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../tungsten/crystal_structure.html">Tungsten</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../uranium/crystal_structure.html">Uranium ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../vanadium/crystal_structure.html">Vanadium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../xenon/crystal_structure.html">Xenon</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../ytterbium/crystal_structure.html">Ytterbium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../yttrium/crystal_structure.html">Yttrium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../zinc/crystal_structure.html">Zinc</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../zirconium/crystal_structure.html">Zirconium</a></li> </ul> </div> </div>  <div class="pure-g"> <div class="pure-u-1"> <div class="pure-menu pure-menu-open pure-menu-horizontal centre" role="navigation" style="background: #000 url(../_media/elements/discharge/Ac.png) repeat-y center; background-size:contain;"> <span><a class="pure-menu-heading" href="https://winter.group.shef.ac.uk/webelements/"><img height="30" src="../_media/icons/logo_60.png" alt="WebElements logo"></a> <a class="white" href="./">Actinium - <sub>89</sub>Ac</a>  <audio id="myAudio_f"> <source src="../_media/elements/snds_f/Ac.mp3" type="audio/mpeg">Your user agent does not support the HTML5 Audio element. </audio> <button class="pure-button f_button" style=" display: inline;" type="button" onclick="audf_play_pause()"> 🔊  </button> <script> function audf_play_pause() { var myAudiof = document.getElementById("myAudio_f"); if (myAudiof.paused) { myAudiof.play(); } else { myAudiof.pause(); }} </script></span> </div> </div> </div> <div id="main">  <div class="pure-u-1 pure-u-sm-1-1"> <div class="pure-menu pure-menu-horizontal pure-menu-scrollable"> <a href="#" class="pure-menu-link pure-menu-heading">▸▸</a> <ul class="pure-menu-list"> <li class="pure-menu-item">🇬🇧 Actinium</li> <li class="pure-menu-item">🇺🇦 Актиній</li> <li class="pure-menu-item">🇨🇳 錒</li> <li class="pure-menu-item">🇳🇱 Actinium</li> <li class="pure-menu-item">🇫🇷 Actinium</li> <li class="pure-menu-item">🇩🇪 Actinium</li> <li class="pure-menu-item">🇮🇱 אקטיניום</li> <li class="pure-menu-item">🇮🇹 Attinio</li> <li class="pure-menu-item">🇯🇵 アクチニウム</li> <li class="pure-menu-item">🇵🇹 Actínio</li> <li class="pure-menu-item">🇪🇸 Actinio</li> <li class="pure-menu-item">🇸🇪 Aktinium</li> <li class="pure-menu-item">🇷🇺 Актиний</li> </ul> </div> </div> <div class="pure-g"> <div class="pure-u-1 pure-u-sm-1-1"> <div class="google_navbar_positioning"> <form action="https://www.google.com" id="cse-search-box"> <div> <input type="hidden" name="cx" value="partner-pub-9334432533380510:6223510783"> <input type="hidden" name="ie" value="UTF-8"> <input type="text" name="q" size="28"> <input type="submit" name="sa" value="Search"> </div> </form> <script> </script> </div> </div> </div> <main> <div class="pure-g"> <div class="pure-u-1 pure-u-sm-1-1"> <h1 class="f">Actinium - <sub><small>89</small></sub>Ac: crystal structures</h1> <div class="pure-menu pure-menu-horizontal pure-menu-scrollable"> <ul class="pure-menu-list z_menu"> <li class="pure-menu-item f"><a href="../actinium/" class="pure-menu-link">▸▸ Ac Essentials</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/physics.html">Physical properties</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/atoms.html">Electron shell data</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/atom_sizes.html">Atom sizes</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/electronegativity.html">Electronegativity</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/isotopes.html" >Isotopes and NMR</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/crystal_structure.html">Crystal structure</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/thermochemistry.html">Thermochemistry</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/history.html">History</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/uses.html">Uses</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/geology.html">Geology</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/biology.html">Biology</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/compounds.html">Binary compounds</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/compound_properties.html" >Compound properties</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/chemistry.html">Element reactions</a></li> <li class="pure-menu-item f"><a class="pure-menu-link" href="../actinium/contents.html">List all Ac properties</a></li> </ul> </div> </div> </div> <ul class="ul_facts_table nobullets"> <li>Space group: <strong>Fm-3m</strong></li> <li>Space group number: <strong> 225</strong></li> <li>Structure: <strong>ccp (cubic close-packed)</strong></li> <li>Cell parameters: <ul> <li><em>a</em>: 567 pm</li> <li><em>b</em>: 567 pm</li> <li><em>c</em>: 567 pm</li> <li>α: 90.000°</li> <li>β: 90.000°</li> <li>γ: 90.000°</li> </ul></li> </ul> <p>You may view the structure of actinium:</p> <ul class="ul_facts_table nobullets"> <li><a href="crystal_structure_pdb.html">interactively</a> (best, but the page will take longer to load) or</li> <li><a href="crystal_structure.html">non-interactively</a></li> </ul> <div class="pure-g"> <div class="pure-u-1 pure-u-sm-1-2"> <figure><img class="pure-img" src="../_media/elements/crystal_structure_image/Ac-bs.jpg" alt="Actinium crystal structure image (ball and stick style)" /><figcaption>Actinium crystal structure image (ball and stick style).</figcaption></figure> </div> <div class="pure-u-1 pure-u-sm-1-2"> <figure><img class="pure-img" src="../_media/elements/crystal_structure_image/Ac-sf.jpg" alt="Actinium crystal structure image (space filling style)" /><figcaption>Actinium crystal structure image (space filling style).</figcaption></figure> </div> <div class="pure-u-1 pure-u-sm-1-1"> </div> </div> <h3 class="f">References</h3> <p>J. D. Farr, A. L. Giorgi, M. G. Bowman, and R. K. Money, <em>J. Inorg. Nucl. Chem.</em>, 1961, <strong>18</strong>, 42.</p> </main> <div id="footer"> <footer> <div class="footer"> <div class="pure-g"> <div class="pure-u-1-2 pure-u-sm-1-2 pure-u-lg-1-4 pure-menu custom-restricted-width"> <ul class="pure-menu-list"> <li class="pure-menu-heading footer_h">Key properties</li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/eneg_pauling/">Electronegativity </a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/melting_point/">Melting point</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/density/">Density </a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/molar_volume/">Molar volume</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/ionis_energy_1/">Ionization energy (1st)</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/covalent_radius/">Covalent radius</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/metallic_radius/">Metallic radius</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/abund_crust/">Abundance: earth's crust</a></li> </ul> </div> <div class="pure-u-1-2 pure-u-sm-1-2 pure-u-lg-1-4 pure-menu custom-restricted-width"> <ul class="pure-menu-list"> <li class="pure-menu-heading footer_h">Shop</li> <li class="pure-menu-item">Sorry, shop closed</li> </ul> </div> <div class="pure-u-1-2 pure-u-sm-1-2 pure-u-lg-1-4 pure-menu custom-restricted-width"> <ul class="pure-menu-list"> <li class="pure-menu-heading footer_h">Social</li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.facebook.com/webelements.periodic.table">Facebook</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://twitter.com/periodic_table">Twitter</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.pinterest.com/periodictable/">Pinterest</a></li> </ul> </div> <div class="pure-u-1-2 pure-u-sm-1-2 pure-u-lg-1-4 pure-menu custom-restricted-width"> <ul class="pure-menu-list"> <li class="pure-menu-heading footer_h">Administration</li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/nexus/your-privacy/" title="Your privacy">Privacy</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/nexus/about-webelements/" title="About WebElements">About</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/nexus/webelements-and-copyright/" title="Copyright information about WebElements">Copyright</a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/nexus/acknowledgements/" title="Acknowledgements">Thanks...</a></li> </ul> </div> </div> </div> <address> <p> <a href="https://www.webelements.com/"><img class="logo_m" src="../_media/icons/logo_60.png" alt="WebElements home" /></a><br /> <strong>WebElements:</strong> THE periodic table on the WWW [<a href="https://www.webelements.com/">www.webelements.com</a>]<br /> <a href="https://www.webelements.com/nexus/webelements-and-copyright/">Copyright </a> 1993-2024 <a href="https://winter.group.shef.ac.uk/">Mark Winter</a> [ <a href="https://www.sheffield.ac.uk/chemistry/">The University of Sheffield </a> and WebElements Ltd, UK]. All rights reserved.</p> <p>You can reference the WebElements periodic table as follows:<br />"WebElements, https://www.webelements.com, accessed November 2024."</p> </address> </footer> </div> </div> </div> <script src="../_newlands/javascript/menus.js"></script> <script src="../_newlands/pure-layout-side-menu/js/ui.js"></script> </body> </html>