Smithsonite Graf D L American Mineralogist 46 (1961) 1283-1316 Crystallographic tables for the rhombohedral carbonates Locality: synthetic _database_code_amcsd 0000102 4.6528 4.6528 15.025 90 90 120 R-3c atom x y z Zn 0 0 0 C 0 0 .25 O .2764 0 .25