Gaspeite Graf D L American Mineralogist 46 (1961) 1283-1316 Crystallographic tables for the rhombohedral carbonates Locality: synthetic _database_code_amcsd 0000105 4.5975 4.5975 14.723 90 90 120 R-3c atom x y z Ni 0 0 0 C 0 0 .25 O .2797 0 .25