\n
\n
![\"EarthSnap\"\/](\"https:\/\/www.newsbeep.com\/nz\/wp-content\/uploads\/2026\/01\/earthsnap-banner-news.webp.webp\")
\n<\/a><\/p>\n
Inside a press squeezed to 20 gigapascals, the carbon formed a 0.04 inches (0.10 centimeters) sample that the team says is a pure new diamond structure.<\/p>\n
Matching that pattern, Xigui Yang, Ph.D., at Zhengzhou University (ZZU<\/a>) linked the sample to a structure long argued over.<\/p>\n Earlier claims usually involved tiny grains mixed with other carbon forms, which made it hard to prove a separate material existed.<\/p>\n A cleaner piece changed that argument by giving researchers something solid enough to measure, compare, and challenge.<\/p>\n Debate over structure<\/p>\n Back in 1967, scientists reported lonsdaleite<\/a>, a hexagonal form of diamond, in meteorites and impact debris.<\/p>\n Years later, a 2014 analysis<\/a> argued those signals could come from damaged ordinary diamonds instead of a separate crystal.<\/p>\n That objection remained influential because the material often appeared only in tiny, messy fragments left after violent impacts.<\/p>\n \u201cThese findings resolve the long-standing controversy on the existence of HD as a discrete carbon phase and provide new insight into the graphite-to-diamond phase transition, paving the way for future research and practical use of HD in advanced technological applications,\u201d wrote Yang.<\/p>\n Starting with graphite<\/p>\n The ZZU team began with graphite, a soft layered form of carbon<\/a>, because its stacked sheets can snap into a new pattern.<\/p>\n Pressure reached 20 gigapascals and heat rose from 2,372 to 3,452\u00b0F (1,300 to 1,900\u00b0C), forcing those sheets together instead of sideways.<\/p>\n That direction was critical because bonds formed across the layers, which turned a slippery arrangement into a rigid three-dimensional network.<\/p>\n By the end, the group had recovered a piece large enough for multiple direct tests.<\/p>\n Proving the structure<\/p>\n To check the claim, the team used X-ray diffraction, a way to map atomic positions, on the recovered crystal.<\/p>\n That test bounces X-rays off atoms, and the returning pattern reveals how the carbon atoms line up.<\/p>\n Results from the crystal matched the hexagonal layout rather than the mixed patterns that had clouded earlier reports.<\/p>\n With a purer structure in hand, the case no longer rested on traces buried inside impact rubble.<\/p>\n Diamond strength tested<\/p>\n After proving the structure, the group turned to Vickers hardness, a test that measures resistance to indentation.<\/p>\n Under a 9.8-newton load, the material<\/a> reached about 114 gigapascals along one direction in repeated indentation tests.<\/p>\n Even there, the advantage over ordinary diamonds stayed slight, which made the result easier to trust.<\/p>\n What stood out was not a cartoonish leap in strength, but a verified gain in a disputed material.<\/p>\n Heat matters too<\/p>\n Hardness alone would not make this material useful if heat quickly knocked its crystal pattern apart.<\/p>\n Later tests showed strong thermal stability, the ability to keep its structure<\/a> when heated, compared with the starting graphite.<\/p>\n That matters for cutting and drilling because hot tool edges lose value fast when a hard surface starts to break down.<\/p>\n A material that stays hard under stress and heat becomes more suitable for machines, electronics, and other punishing jobs.<\/p>\n From space to lab<\/p>\n Meteorite impacts can make this diamond when carbon is suddenly squeezed, heated, and rearranged under extreme stress.<\/p>\n A 2022 meteorite study<\/a> argued that lonsdaleite can form before ordinary diamond during some violent impact events.<\/p>\n That natural record helps explain why researchers care, because the lab result may echo an extreme process already happening in space.<\/p>\n Even so, matching nature is not the same as mastering production, and that gap decides whether industry will care.<\/p>\n Potential industrial uses<\/p>\n Industry already uses diamonds where tools must cut, grind, or survive intense friction without wearing away.<\/p>\n A slightly harder version could last longer at the surface, because fewer atomic bonds would give way under pressure.<\/p>\n Researchers also care about electronics, since diamond moves heat efficiently and resists damage in harsh environments.<\/p>\n Real applications still depend on making bigger pieces reliably, at lower cost, and with properties engineers can repeat.<\/p>\n What remains uncertain<\/p>\n One promising crystal does not settle everything, because hardness can change with direction, load, flaws, and sample size.<\/p>\n Other labs will now try to reproduce the recipe, probe larger samples, and test<\/a> wear under real working conditions.<\/p>\n They will also compare this material with the best engineered diamonds, not just with ordinary natural stones.<\/p>\n That next round matters because an unusually hard material earns trust only after independent groups fail to break the claim.<\/p>\n What this changes<\/p>\n Chinese researchers have not merely made another tough lab crystal. They have given a disputed carbon form its clearest physical identity yet.<\/p>\n Whether it becomes a useful product or a scientific benchmark, the result forces future diamond research onto firmer ground.<\/p>\n The study is published in the journal Nature<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read?\u00a0Subscribe to our newsletter<\/a>\u00a0for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on\u00a0EarthSnap<\/a>, a free app brought to you by\u00a0Eric Ralls<\/a>\u00a0and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"Researchers have reported the first laboratory creation of a pure hexagonal diamond that tests slightly harder than many…\n","protected":false},"author":2,"featured_media":335120,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[111,139,69,147],"class_list":{"0":"post-335119","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-new-zealand","9":"tag-newzealand","10":"tag-nz","11":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/335119","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/comments?post=335119"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/posts\/335119\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media\/335120"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/media?parent=335119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/categories?post=335119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/nz\/wp-json\/wp\/v2\/tags?post=335119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}