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 = 8.30 GPa _database_code_amcsd 0004380 5.9577 5.2189 4.1792 95.306 100.155 108.412 P-1 atom x y z K .299 .133 .289 D .0860 .7070 .533 C .2315 .5733 .9120 O1 .2040 .775 .749 O2 .1093 .3300 .773 O3 .3738 .6385 .175