Na(NH4)CrO4*2H2O Khan A A, Baur W H Acta Crystallographica B28 (1972) 683-693 Salt hydrates. VIII. The crystal structures of sodium ammonium orthochromate dihydrate and magnesium diammonium bis(hydrogen orthophosphate) tetrahydrate and a discussion of the ammonium ion _database_code_amcsd 0009428 8.413 13.039 6.219 90 90 90 P2_12_12_1 atom x y z Biso Na .261 .490 .900 2.5 NH4 .156 .856 .376 2.6 Cr .0970 .1281 .3832 1.9 O1 .081 .206 .183 3.1 O2 .082 .189 .607 3.6 O3 .272 .072 .375 4.0 O4 .039 .539 .134 2.9 Wat5 .197 .633 .671 2.8 Wat6 .090 .404 .654 2.4