Chrome Green

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Chrome Green
Posting date : Dec 23, 2011
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32-
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Cr2O3 adopts the corundum structure, consisting of a hexagonal close packed array of oxide anions with 2/3 of the octahedral holes occupied by chromium. Similar to corundum, Cr2O3 is a hard, brittle material (Mohs hardness 8-8.5). It is antiferromagnetic up to 307 K, the Neel temperature. It not readily attacked by acids or bases, although molten alkali gives chromites (salts with the Cr2O2−4 anion, not to be confused with the related mineral chromite).

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