Citation: Stahl, K. (1993). A neutron powder diffraction study of partially dehydrated fluorapophyllite, KCa4Si8O20F*6.9H2O. European Journal of Mineralogy, 5, pp. 845-849.
Formula: Ca4 F H13.76 K O26.88 Si8
List type: interleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: O20 Si8 (O5 Si2)
Multiplicity: 1
Coordination sequences: