Butschliite Pabst A American Mineralogist 59 (1974) 353-358 Synthesis, properties and structure of K2Ca(CO3)2, buetschliite _database_code_amcsd 0000400 5.380 5.380 18.120 90 90 120 R-3m atom x y z Ca 0 0 0 K 0 0 .213 C 0 0 .586 O .138 -.138 .586