磁赤铁矿[Maghemite] - 达人(其实～我是卧底，来自外星)

2005/10/28 | 磁赤铁矿[Maghemite]
类别(℃〖化学〗) | 评论(0) | 阅读(56) | 发表于 19:54: The anhydrous iron oxide Fe₂O₃ which has a defect spinel structure with a hematite stoichiometry. It also exists in the Fe₂O₃ polymorph. Maghemite has a cation vacancy, so its structure is more accurately written as Fe₃(Fe₅-O₁₂. It is highly ferromagnetic, and does not lose its magnetism easily upon contact. However, it is weak enough to be fairly easily realigned. It is the coating used on floppy disks and cassettes. It forms when iron minerals rust.; 0