Citation: Bellezza, M.; Merlino, S.; Perchiazzi, N. (2004). Chemical and structural study of the Zr,Ti-disilicates in the venanzite from Pian di Celle, Umbria, Italy. European Journal of Mineralogy, 16, pp. 957-969.
Formula: Ca3.69 F2 Na0.17 O7 Si2 Zr0.14
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Ca4 F4 O28 Si8 Zr4 (Ca F O7 Si2 Zr)
Multiplicity: 1