Citation: Finger, L. W. (1969). The crystal structure and cation distribution of a grunerite. Mineralogical Society of America Special Paper, 2, pp. 95-100.
Formula: F0.5 Fe6.1 H1.5 Mg0.9 O23.5 Si8
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: F4 Fe14 Mg14 O48 Si16 (F2 Fe7 Mg7 O24 Si8)
Multiplicity: 1