H3 K2 O8 P S Averbuch-Pouchot M, Durif A Materials Research Bulletin 15 (1980) 427-430 Crystal structure of (K H SO4)(K H2 P O4) _cod_database_code 1007141 _database_code_amcsd 0014284 7.434 7.341 7.148 90 99.56 90 P2_1/n atom x y z occ K1 .20842 .1953 .6023 S1 .2473 .2024 .0942 .5 P1 .2473 .2024 .0942 .5 O1 .1040 .2836 .1966 O2 .1579 .0463 .9731 O3 .3273 .3352 .9802 O4 .3968 .1214 .2429