Citation: Moore, P. B.; Araki, T. (1977). Overite, segelerite, and jahnsite: a study in combinatorial polymorphism. American Mineralogist, 62, pp. 692-702.
Formula: Al Ca H9 Mg O13 P2
List type: interleaving
List: 2D
Basis: (0;1;0 0;0;1)
Dimensionality: 2
Formula: Al4 Mg4 O52 P8 (Al Mg O13 P2)
Multiplicity: 1