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Sulfates

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Gypsum
CaSO4-2(H2O)
gypsum2.JPG (34566 bytes) gypsum3.JPG (38851 bytes) gypsum4.jpg (35565 bytes)		 Celestite
SrSO4
celestite.JPG (36105 bytes) celestite2.JPG (34259 bytes)
Anhydrite
CaSO4