Formula : Al2[(OH)3/PO4]
System: monoclinic Hardness:4½-5 Rarity:not common
Strunz id:VII/B.12-20 -
PHOSPHATES, ARSENATES and VANADATES
Name origin: Named in 1868 by Christian W. Bloomstrand from the Greek αυγή ("auge") for "shine" or "luster," in allusion to the appearance of its cleavage surfaces
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