creedite


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creedite

[′krē‚dīt]
(mineralogy)
Ca3 Al2(SO4)(F,OH)10·2H2O A white or colorless monoclinic mineral consisting of hydrous calcium aluminum fluoride with calcium sulfate, occurring in grains and radiating crystalline masses; hardness is 2 on Mohs scale, and specific gravity is 2.7.