Citation: Pring, A.; Gatehouse, B. M.; Birch, W. D. (1990). Francisite, Cu3Bi(SeO3)2O2Cl, a new mineral from Iron Monarch, South Australia: Description and crystal structure. American Mineralogist, 75, pp. 1421-1425.
Formula: Bi Cl Cu3 O8 Se2
List type: noninterleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Bi2 Cu6 O16 Se4 (Bi Cu3 O8 Se2)
Multiplicity: 1