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单词 iron oxide
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iron oxide
iron oxide n. any of various oxides of iron; esp. iron( iii) oxide (ferric oxide), Fe2O3, a dark red solid which occurs as the mineral haematite, is used as jeweller's rouge, and in hydrated form is the main component of rust.There are two other main oxides of iron: iron( ii) oxide (ferrous oxide), FeO, a black solid which is a main component of the mineral wüstite; and iron( ii, iii) oxide (ferrosoferric oxide), Fe3O4, a black magnetic solid which occurs as the mineral magnetite or lodestone.
ΚΠ
1790Iron oxide [see Compounds 1b].
1864 T. L. Phipson Utiliz. Minute Life x. 256 In the lakes of Sweden there are vast layers of iron oxide almost exclusively built up by animalcules.
1913 N. Heaton Hurst's Man. Painters' Colours (ed. 5) v. 155 Iron oxide is also the colouring principle of the group of pigments known as ‘earth colours’.
1979 Antiquaries Jrnl. 59 309 Any magnetic particles (chiefly the iron oxides haematite and magnetite) of appropriate size behave like small compass needles.
2007 Times (Nexis) 27 Sept. 29 Oxygen is transported, as part of iron oxide, by geological movements deep beneath the Earth's crust.
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