Anhydrite
Cheng G, Zussman J
Acta Crystallographica 16 (1963) 767-769
The crystal structure of anhydrite (CaSO4)
Locality: Madagascar
_database_code_amcsd 0020853
6.991 6.996 6.238 90 90 90 Amma
atom   x    y    z Biso
Ca   .75    0 .346   .7
S    .25    0 .155   .7
O1   .25 .171 .015   .9
O2   .08    0 .298  1.1