AM_FeOHSO4_1 Formula: Fe S O5 Name: FeOHSO4 Unit cell: 7.33 7.14 7.39 90.0 119.7 90.0 , V=335.96 Space group: P121/C1 (14)

Ventruti G , Scordari F , Schingaro E , Gualtieri A F , Meneghini C , American Mineralogist , 90 (2005) p.679-686, The order-disorder character of FeOHSO4 obtained from the thermal decomposition of, metahohmannite, Fe3+2(H2O)4[O(SO4)2], Sample: T = 220 C, Note: this is the MDO2 polytype, a maximally ordered member of a family of OD structures