单词	hematite
释义	hematite noun he·​ma·​tite ˈhē-mə-ˌtīt  : a reddish-brown to black mineral consisting of ferric oxide, constituting an important iron ore, and occurring in crystals or as earthy red ocher hematitic ˌhē-mə-ˈti-tik  adjective Example Sentences Recent Examples on the Web More than 12,000 years ago, the first inhabitants of present-day eastern Wyoming came across a fruitful deposit of hematite, or red ocher, and began digging out the valuable, blood-red mineral using animal bones and antlers. Sarah Kuta, Smithsonian Magazine, 24 May 2022 No new hematite is being formed today, Lacefield said, because that ancient bacteria is no longer around. Dennis Pillion | Dpillion@al.com, al, 1 Dec. 2021 The rust comes from iron on the lunar surface oxidating into lunar hematite. Jamie Carter, Forbes, 20 Sep. 2021 So, all in all, Mars is red because of hematite, which is a red form of ferric oxide. Ethan Siegel, Forbes, 11 Mar. 2021 Like on Mars, the red color of the Tséyi’ rocks derive from the mineral hematite, and the canyon was carved into the sandstone by running water, once abundant also on the Red Planet. David Bressan, Forbes, 12 Mar. 2021 The particles that make up this hematite are small: between about 3 and 45 microns in diameter. Ethan Siegel, Forbes, 11 Mar. 2021 The polar surfaces showed spectra that matched the mineral hematite (Fe2O3), according to the study's abstract. Chris Ciaccia, Fox News, 6 Sep. 2020 To confirm that hematite was in fact present, the team recruited Jet Propulsion Laboratory researchers Abigail Fraeman and Vivian Sun to give their findings a second look. Jennifer Nalewicki, Smithsonian Magazine, 9 Sep. 2020 See More Word History First Known Use 1540, in the meaning defined above
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