KHCO3 Allan D R, Marshall W G, Pulham C R American Mineralogist 92 (2007) 1018-1025 The high-pressure crystal structure of potassium hydrogen carbonate (KHCO3) Sample: P = 7.18 GPa _database_code_amcsd 0004378 6.0237 5.2476 4.1958 95.292 100.348 108.578 P-1 atom x y z K .306 .137 .295 D .0849 .705 .538 C .2317 .575 .911 O1 .208 .780 .742 O2 .111 .330 .778 O3 .376 .638 .176