“iron(III) oxide”的概念、定义、翻译、参考文献-科学参考

单词	iron(III) oxide
释义	iron(III) oxide Chemistry A red-brown to black insoluble solid, Fe₂O₃; trigonal; r.d. 5.24; m.p. 1565°C. There is also a hydrated form, Fe₂O₃.xH₂O, which is a red-brown powder; r.d. 2.44–3.60. (See rusting.) Iron(III) oxide occurs naturally as haematite and can be prepared by heating iron(III) hydroxide or iron(II) sulphate. It is readily reduced on heating in a stream of carbon monoxide or hydrogen.
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