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 = 7.61 GPa _database_code_amcsd 0004379 5.9935 5.2346 4.1889 95.298 100.273 108.498 P-1 atom x y z K .301 .132 .294 D .086 .709 .533 C .2332 .570 .909 O1 .204 .774 .747 O2 .113 .330 .768 O3 .376 .635 .180