AM_Ca2(NH4)2P6O186H2O Formula: Ca P3 N2 O12 H16 Name: Ca2(NH4)2P6O18.6H2O Unit cell: 12.821 12.537 7.029 90.0 90.0 90.0 , V=1129.82 Space group: P212121 (19)

Averbuch-Pouchot M T , Acta Crystallographica, Section C , 46 (1990) p.2005-2007, Crystal chemistry of cyclo-hexaphosphates. XII. structure of ammonium calcium, cyclo-hexaphosphate hexahydrate