Cr2 Cu H2 K2 O14 P2 Coing-Boyat J, Durif A, Guitel J Journal of Solid State Chemistry 30 (1979) 329-334 Structure cristalline d'un phosphochromate acide de cuivre potassium: Cu K2 H2 (P Cr O7)2 _cod_database_code 1007042 _database_code_amcsd 0013372 9.559 7.196 8.983 90 93.73 90 P2_1/c atom x y z Cu1 0 0 .5 K1 .69464 .12278 .17615 Cr1 .34715 .11598 .39091 P1 .08815 .13012 .18629 O1 .2149 .2336 .2643 O2 .4523 .0010 .2937 O3 .7373 .0274 .5073 O4 .4272 .2780 .4843 O5 .8443 .4478 .3757 O6 .9785 .0799 .2932 O7 .0244 .2400 .0550