AM_Heinrichite Formula: U2 As2 Ba O22 H20 Name: Heinrichite Unit cell: 7.1548 7.134 21.29 90.0 104.171 90.0 , V=1053.62 Space group: P12/C1 (13)

Locock A J , Burns P C , Flynn T M , The Canadian Mineralogist , 43 (2005) p.721-733, Structures of strontium- and barium-dominant compounds that contain the autunite-type sheet