Cahnite Prewitt C T, Buerger M J American Mineralogist 46 (1961) 1077-1085 The crystal structure of cahnite, Ca2BAsO4(OH)4 Locality: Franklin, New Jersey, USA _database_code_amcsd 0000097 7.11 7.11 6.20 90 90 90 I-4 atom x y z As 0 0 0 B 0 .5 .25 Ca1 0 0 .5 Ca2 0 .5 .75 O1 .178 .054 .167 OH2 .160 .444 .114