Citation: Calvo, C. (1968). The crystal structure of graftonite. American Mineralogist, 53, pp. 742-750.
Formula: Ca Fe1.38 Mn0.62 O8 P2
List type: noninterleaving
List: 2D
Basis: (0;1;0 0;0;1)
Dimensionality: 2
Formula: Fe8 Mn8 O32 P8 (Fe Mn O4 P)
Multiplicity: 1