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class="navpanel-d"><a title="iron" href="../iron/history.html">Fe</a></th> <th class="navpanel-d">Co</th> <th class="navpanel-d"><a title="nickel" href="../nickel/history.html">Ni</a></th> </tr> <tr> <th class="navpanel-d"><a title="ruthenium" href="../ruthenium/history.html">Ru</a></th> <th class="navpanel-d"><a title="rhodium" href="../rhodium/history.html">Rh</a></th> <th class="navpanel-d"><a title="palladium" href="../palladium/history.html">Pd</a></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/Co-loc.png" alt="Cobalt location" /></a> </div> </li>  <li class="pure-menu-item f"><a class="pure-menu-link f" href="../actinium/history.html">Actinium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../aluminium/history.html">Aluminium</a></li> <li class="pure-menu-item p"><a 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href="../radium/history.html">Radium ☢</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../radon/history.html">Radon ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../rhenium/history.html">Rhenium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../rhodium/history.html">Rhodium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../roentgenium/history.html">Roentgenium ☢</a></li> <li class="pure-menu-item s"><a class="pure-menu-link s" href="../rubidium/history.html">Rubidium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../ruthenium/history.html">Ruthenium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../rutherfordium/history.html">Rutherfordium ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../samarium/history.html">Samarium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" 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href="../tantalum/history.html">Tantalum</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../technetium/history.html">Technetium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../tellurium/history.html">Tellurium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../tennessine/history.html">Tennessine ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../terbium/history.html">Terbium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../thallium/history.html">Thallium</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../thorium/history.html">Thorium ☢</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../thulium/history.html">Thulium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../tin/history.html">Tin</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../titanium/history.html">Titanium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../tungsten/history.html">Tungsten</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../uranium/history.html">Uranium ☢</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../vanadium/history.html">Vanadium</a></li> <li class="pure-menu-item p"><a class="pure-menu-link p" href="../xenon/history.html">Xenon</a></li> <li class="pure-menu-item f"><a class="pure-menu-link f" href="../ytterbium/history.html">Ytterbium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../yttrium/history.html">Yttrium</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../zinc/history.html">Zinc</a></li> <li class="pure-menu-item d"><a class="pure-menu-link d" href="../zirconium/history.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/Co.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="./">Cobalt - <sub>27</sub>Co</a>  <audio id="myAudio_f"> <source src="../_media/elements/snds_f/Co.mp3" type="audio/mpeg">Your user agent does not support the HTML5 Audio element. </audio> <button class="pure-button d_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">🇬🇧 Cobalt</li> <li class="pure-menu-item">🇺🇦 Кобальт</li> <li class="pure-menu-item">🇨🇳 鈷</li> <li class="pure-menu-item">🇳🇱 Kobalt</li> <li class="pure-menu-item">🇫🇷 Cobalt</li> <li class="pure-menu-item">🇩🇪 Cobalt</li> <li class="pure-menu-item">🇮🇱 קובלט</li> <li class="pure-menu-item">🇮🇹 Cobalto</li> <li class="pure-menu-item">🇯🇵 コバルト</li> <li class="pure-menu-item">🇵🇹 Cobalto</li> <li class="pure-menu-item">🇪🇸 Cobalto</li> <li class="pure-menu-item">🇸🇪 Kobolt</li> <li class="pure-menu-item">🇷🇺 Кобальт</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="d">Cobalt - <sub><small>27</small></sub>Co: historical information</h1> <div class="pure-menu pure-menu-horizontal pure-menu-scrollable"> <ul class="pure-menu-list z_menu"> <li class="pure-menu-item d"><a href="../cobalt/" class="pure-menu-link">▸▸ Co Essentials</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/physics.html">Physical properties</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/atoms.html">Electron shell data</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/atom_sizes.html">Atom sizes</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/electronegativity.html">Electronegativity</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/isotopes.html" >Isotopes and NMR</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/crystal_structure.html">Crystal structure</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/thermochemistry.html">Thermochemistry</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/history.html">History</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/uses.html">Uses</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/geology.html">Geology</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/biology.html">Biology</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/compounds.html">Binary compounds</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/compound_properties.html" >Compound properties</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/chemistry.html">Element reactions</a></li> <li class="pure-menu-item d"><a class="pure-menu-link" href="../cobalt/contents.html">List all Co properties</a></li> </ul> </div> </div> </div> <div class="teaser"> <ul class="ul_facts_table nobullets"> <li><strong><a href="../periodicity/discovery/" title="Further information on element discoveries">Discoveror</a>:</strong> Georg Brandt</li> <li><strong>Place of discovery:</strong> Sweden</li> <li><strong>Date of discovery:</strong> 1735</li> <li><strong><a href="../periodicity/discovery/" title="Further information on element discoveries">Origin of name</a> </strong>: from the German word "<em>kobald</em>" meaning "<em>goblin</em>" or evil spirit. </li> </ul> </div> <p class="p_first">Minerals containing cobalt were of value to the early civilisations of Egypt and Mesopotamia for colouring glass deep blue.</p> <p>Cobalt was announced to be an element by Georg Brandt about 1739 (or possibly 1735). He had been trying to demonstrate that the blue colour of glass was because of a new element, cobalt, rather than bismuth, an element often found in the same locations as cobalt.</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]. 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