AM_Chapmanite Formula: Sb Fe2 Si2 O9 H Name: Chapmanite Unit cell: 5.19 8.99 7.7 90.0 100.67 90.0 , V=353.06 Space group: C1M1 (8)

Zhukhlistov A P , Zvyagin B B , Soviet Physics Crystallography , 22 (1977) p.419-423, Determination of the crystal structures of chapmanite and bismuthoferrite by, high-voltage electron diffraction, Locality: Smilokov, Czechoslovakia, Note: z(O3) corrected