Citation: Fanfani, L.; Nunzi, A.; Zanazzi, P.F.; Zanzari, A.R. (1976). Additional data on the crystal structure of montgomeryite. American Mineralogist, 61, pp. 12-14.
Formula: Al4 Ca4 H28 Mg O40 P6
Chemical name: Al4 Ca4 Mg (P O4)6 (O H)4 (H2 O)12
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al8 Mg4 O72 P12 (Al2 Mg O18 P3)
Multiplicity: 1