{"id":515885,"date":"2024-07-31T11:01:53","date_gmt":"2024-07-31T14:01:53","guid":{"rendered":"https:\/\/revistapesquisa.fapesp.br\/?p=515885"},"modified":"2024-07-31T11:01:53","modified_gmt":"2024-07-31T14:01:53","slug":"gold-hidden-in-a-mineral","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/gold-hidden-in-a-mineral\/","title":{"rendered":"Gold hidden in a mineral"},"content":{"rendered":"<div id=\"attachment_515890\" style=\"max-width: 810px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-515890 size-full\" src=\"https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2024\/05\/RPF-notas-sperrilita-2024-03-800.jpg\" alt=\"\" width=\"800\" height=\"985\" srcset=\"https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2024\/05\/RPF-notas-sperrilita-2024-03-800.jpg 800w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2024\/05\/RPF-notas-sperrilita-2024-03-800-250x308.jpg 250w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2024\/05\/RPF-notas-sperrilita-2024-03-800-700x862.jpg 700w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2024\/05\/RPF-notas-sperrilita-2024-03-800-120x148.jpg 120w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><p class=\"wp-caption-text\"><span class=\"media-credits-inline\">Mrrk \/ Wikimedia Commons<\/span>Sperrylite, a common source of platinum<span class=\"media-credits\">Mrrk \/ Wikimedia Commons<\/span><\/p><\/div>\n<p>In a stream in the municipality of Morro do Pilar, geologists Alexandre Raphael Cabral of the Federal University of Minas Gerais and Ant\u00f4nio Seabra Gomes Jr., from a mineral exploration company, found a tiny piece of gold measuring approximately one millimeter in length, with a platinum arsenide mineral called sperrylite inside it, measuring 2 to 10 micrometers. The surprise came later. After the grain of gold was polished by geologist Stephanie Lohmeier of the Clausthal University of Technology in Germany, the researchers found that gold atoms could replace arsenic atoms inside the mineral, albeit in small proportions: in 100 grams (g) of sperrylite, gold would correspond to 3.4 g. \u201cThere was plenty of gold and little arsenic to bond with the platinum,\u201d says Cabral. \u201cThe auriferous sperrylite proves a possibility that had already been demonstrated theoretically and experimentally.\u201d The discovery suggests another possible source of platinum and gold: quartz veins formed at low temperatures\u2014close to 350 \u00b0C\u2014as a result of earthquakes that occurred around 500 million years ago, in a 230-kilometer area between Ouro Preto and Diamantina (<em>The Canadian Journal of Mineralogy and Petrology<\/em>, January 18).<\/p>\n","protected":false},"excerpt":{"rendered":"Grain containing rare mineral reveals potential source of platinum and gold in quartz veins","protected":false},"author":475,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1651],"tags":[200],"coauthors":[785],"class_list":["post-515885","post","type-post","status-publish","format-standard","hentry","category-notes","tag-environment"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/515885","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=515885"}],"version-history":[{"count":1,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/515885\/revisions"}],"predecessor-version":[{"id":515894,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/515885\/revisions\/515894"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=515885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=515885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=515885"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=515885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}