Schertelite 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 Locality: synthetic _database_code_amcsd 0009429 11.49 23.66 8.62 90 90 90 Pbca atom x y z Biso Mg .2043 .3706 .9879 1.7 NH41 .102 .215 .121 1.0 NH42 .270 .470 .356 .5 P1 .4242 .1679 .0314 1.6 P2 .4699 .4198 .0710 1.5 O1 .385 .107 .048 2.2 O2 .344 .211 .108 2.3 O3 .056 .175 .439 1.5 OH4 .404 .314 .348 2.9 O5 .017 .362 .388 2.5 O6 .338 .423 .067 1.8 O7 .022 .466 .328 2.3 OH8 .522 .069 .398 2.9 Wat9 .089 .441 .034 1.3 Wat10 .195 .335 .211 1.6 Wat11 .216 .098 .264 2.2 Wat12 .303 .197 .422 2.8