单词	ferric oxide
释义	ferric oxide noun : the red or black oxide of iron Fe2O3 found in nature as hematite and as rust and also obtained synthetically and used especially in magnetic materials, as a pigment, and for polishing Example Sentences Recent Examples on the Web Two irons and three oxygens make ferric oxide, or Fe2O3—a complete picture that’s hard to pull apart. Matthew Hutson, The New Yorker, 18 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 The greatest elevations occur in the ferric oxide-rich Tharsis region, but in the lowlands to the east of it, the abundances of ferric oxides plummets. Ethan Siegel, Forbes, 11 Mar. 2021 And the worldwide shortage of gamma ferric oxide has brought tape production to a crawl. David Grossman, Popular Mechanics, 11 Oct. 2019 The team also found that the asteroid’s chemistry was dominated by compounds called ferric oxides and phyllosilicates, which had never been seen before on Kuiper belt objects. New York Times, 10 May 2018 Word History First Known Use 1851, in the meaning defined above Medical Definition ferric oxide noun : the red or black oxide of iron Fe2O3 found in nature as hematite and as rust and also obtained synthetically and used as a pigment and for polishing
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