Archerite Nelmes R J, Meyer G M, Tibballs J E Journal of Physics C: Solid State Physics 15 (1982) 59-75 The crystal structure of tetragonal KH2PO4 and KD2PO4 as a function of temperature Sample: T = 295 K _database_code_amcsd 0013165 7.4521 7.4521 6.974 90 90 90 I-42d atom x y z occ U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) K 0 0 .5 .0204 .0204 .0141 0 0 0 H .14757 .22559 .12161 .5 .0223 .0249 .0268 -.0005 -.0019 -.0020 P 0 0 0 .0106 .0106 .0138 0 0 0 O .14839 .08264 .12584 .0144 .0142 .0186 .0019 -.0054 -.0039