Anhydrite (soluble) Lager G A, Armbruster T, Rotella F J, Jorgensen J D, Hinks D G American Mineralogist 69 (1984) 910-918 A crystallographic study of the low-temperature dehydration products of gypsum CaSO4*2H2O: hemihydrate CaSO4*0.50H2O, and gamma-CaSO4 Note: gamma-CaSO4 Locality: synthetic _database_code_amcsd 0019837 6.9694 6.9694 6.3033 90 90 120 P6_222 atom x y z Biso Ca .5 0 0 0.99 S .5 0 .5 1.17 O .4458 .1347 .3578 1.44