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</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/F.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="./">Fluorine - <sub>9</sub>F</a>  <audio id="myAudio_f"> <source src="../_media/elements/snds_f/F.mp3" type="audio/mpeg">Your user agent does not support the HTML5 Audio element. </audio> <button class="pure-button p_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">🇬🇧 Fluorine</li> <li class="pure-menu-item">🇺🇦 Фтор</li> <li class="pure-menu-item">🇨🇳 氟</li> <li class="pure-menu-item">🇳🇱 Fluor</li> <li class="pure-menu-item">🇫🇷 Fluor</li> <li class="pure-menu-item">🇩🇪 Fluor</li> <li class="pure-menu-item">🇮🇱 פלואור</li> <li class="pure-menu-item">🇮🇹 Fluoro</li> <li class="pure-menu-item">🇯🇵 フッ素</li> <li class="pure-menu-item">🇵🇹 Flúor</li> <li class="pure-menu-item">🇪🇸 Flúor</li> <li class="pure-menu-item">🇸🇪 Fluor</li> <li class="pure-menu-item">🇷🇺 Фтор</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="p">Fluorine - <sub><small>9</small></sub>F: geological information</h1> <div class="pure-menu pure-menu-horizontal pure-menu-scrollable"> <ul class="pure-menu-list z_menu"> <li class="pure-menu-item p"><a href="../fluorine/" class="pure-menu-link">▸▸ F Essentials</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/physics.html">Physical properties</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/atoms.html">Electron shell data</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/atom_sizes.html">Atom sizes</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/electronegativity.html">Electronegativity</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/isotopes.html" >Isotopes and NMR</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/crystal_structure.html">Crystal structure</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/thermochemistry.html">Thermochemistry</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/history.html">History</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/uses.html">Uses</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/geology.html">Geology</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/biology.html">Biology</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/compounds.html">Binary compounds</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/compound_properties.html" >Compound properties</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/chemistry.html">Element reactions</a></li> <li class="pure-menu-item p"><a class="pure-menu-link" href="../fluorine/contents.html">List all F properties</a></li> </ul> </div> </div> </div> <p class="p_first">Fluorine gas is never found as the free gas in nature and is always found as the fluoride. Fluorine occurs chiefly in fluorspar (or fluorite, calcium difluoride, CaF<sub>2</sub>), cryolite (Na<sub>2</sub>AlF<sub>6</sub>), and in many other minerals. </p> <h2 class="p">Abundances of fluorine in various environments</h2> <p class="p_first">In this table of abundances, values are given in units of ppb (parts per billion; 1 billion = 10<sup>9</sup>), both in terms of weight and in terms of numbers of atoms. Values for abundances are difficult to determine with certainty, so all values should be treated with some caution, especially so for the less common elements. Local concentrations of any element can vary from those given here an orders of magnitude or so and values in various literature sources for less common elements do seem to vary considerably.</p> <div class="table-responsive"> <table class="pure-table"> <caption>Abundances for fluorine in a number of different environments. Use the links in the location column for definitions, literature sources, and visual representations in many different styles (one of which is shown below)</caption> <thead><tr> <th>Location</th> <th>ppb by weight</th> <th>ppb by atoms</th></tr> </thead> <tbody> <tr class="pure-table-odd"> <td><a href="../periodicity/abund_universe/" title="Definitions and pictures showing periodicity of element abundances in the universe">Universe</a></td> <td>400</td> <td>30</td></tr> <tr> <td><a href="../periodicity/abund_sun/" title="Definitions and pictures showing periodicity of element abundances in the sun">Sun</a></td> <td>500</td> <td>30</td></tr> <tr class="pure-table-odd odd"> <td><a href="../periodicity/abund_met_stony/" title="Definitions and pictures showing periodicity of element abundances in carbonaceous meteorites">Meteorite (carbonaceous)</a></td> <td>89000</td> <td>96000</td></tr> <tr> <td><a href="../periodicity/abund_crust/" title="Definitions and pictures showing periodicity of element abundances in the earth's crust">Crustal rocks</a></td> <td>540000</td> <td>590000</td></tr> <tr class="pure-table-odd"> <td><a href="../periodicity/abund_seawater/" title="Definitions and pictures showing periodicity of element abundances in seawater">Sea water</a></td> <td>1300</td> <td>420</td></tr> <tr> <td><a href="../periodicity/abund_stream/" title="Definitions and pictures showing periodicity of element abundances in stream water">Stream</a></td> <td>100</td> <td>5</td></tr> <tr class="pure-table-odd"> <td><a href="../periodicity/abund_humans/" title="Definitions and pictures showing periodicity of element abundances in the human body">Human</a></td> <td>37000</td> <td>12000</td></tr> </tbody> </table> </div> <div class="pure-g"> <div class="pure-u-1 pure-u-sm-1-1"> <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-9334432533380510" data-ad-slot="4479092381" data-ad-format="auto"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> </div> <figure><img class="pure-img" src= "../_media/periodicity/tables/periodic_table_heatscape_white/abund_crust_l_heat_w.png" alt="Image showing periodicity of the logarithm of the abundance in the earth's crust of the chemical elements as a heat map on a periodic table grid." /><figcaption>Image showing periodicity of the logarithm of the abundance in the earth's crust of the chemical elements as a heat map on a periodic table grid.</figcaption></figure> <figure><img class="pure-img" src= "../_media/periodicity/tables/periodic_table_heatscape_white/abund_sun_a_l_heat_w.png" alt="Image showing periodicity of the logarithm of the abundance (by atom rather than weight) in the sun of the chemical elements as a heat map on a periodic table grid." /><figcaption>Image showing periodicity of the logarithm of the abundance (by atom rather than weight) in the sun of the chemical elements as a heat map on a periodic table grid.</figcaption></figure> <p>The chart above shows the log of the abundance (on a parts per billion scale) of the elements by atom number in our sun. Notice the "sawtooth" effect where elements with even atomic numbers tend to be more strongly represented than those with odd atomic numbers. This shows up best using the "Bar chart" option on the chart.</p > <figure><img class="pure-img" src="../_media/periodicity/cartograms/cartogram_abund_crust_white.png" alt="cartogram depicting abundance of elements in the earth's crust" /><figcaption>A cartogram depicting the abundance of elements in the earth's crust. Squares for each element are distorted in proportion to the numerical value of the abundance.</figcaption></figure> </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]. 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