AM_Sewardite Formula: Ca Fe2 As2 O10 H2 Name: Sewardite Unit cell: 16.461 7.434 12.131 90.0 90.0 90.0 , V=1484.48 Space group: CCCM (66)

Roberts A C , Cooper M A , Hawthorne F C , Criddle A J , Stirling J A R , The Canadian Mineralogist , 40 (2002) p.1191-1198, Sewardite, CaFe2(AsO4)(OH)2, the Ca-analogue of carminite,, from Tsumeb, Namibia: Description and crystal structure, Locality: Tsumeb, Namibia