Citation: Rozhdestvenskaya, I. V.; Nikishova, L. V. (1998). Crystal structure of Na(Ca,Sr)2Si4O10F strontium agrellite from Yakutian charoitites: agrellite polytypes. Crystallography Reports, 43, pp. 589-597.
Formula: Ca3.46 F2 Na2.1 O20 Si8 Sr0.3
List type: interleaving
List: 1D
Basis: (0;0;1)
Dimensionality: 1
Formula: O20 Si8 (O5 Si2)
Multiplicity: 1