Citation: Bjorling, C. O.; Westgren, A. (1938). Minerals of the Varustrask Pegmatite. IX. X-ray studies of triphylite, varulite and their oxidation products. Geologiska Foreningens i Stockholm Forhandlingar, 60, pp. 67-72.
Formula: Fe O4 P
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Fe4 O16 P4 (Fe O4 P)
Multiplicity: 1
Coordination sequences: