AM_NH4Cr(SO4)2_12H2O
Formula: N H28 Cr S2 O20
Name: NH4Cr(SO4)2*12H2O
Unit cell: 12.2491 12.2491 12.2491 90.0 90.0 90.0 , V=1837.86
Space group: PA3 (205)

Rempfer N , Lerner H W , Bolte M , Acta Crystallographica, Section E , 60 (2004) p.i80-i81, The ammonium chromium(III) alum NH4Cr(SO4)2*12H2O