Citation: Colville, A A; Anderson, C P (1971). Refinement of the Crystal Structure of Apophyllite I. X-ray Diffraction. American Mineralogist, 56, pp. 1222-1233.
Formula: Ca4 F H16 K0.84 Na0.16 O28 Si8
Chemical name: Aluminium phosphate(V) dihydrate
List type: interleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: O20 Si8 (O5 Si2)
Multiplicity: 1
Coordination sequences: