Citation: Piilonen, P. C.; McDonald, A. M.; Lalonde, A. E. (2003). Insights into astrophyllite-group minerals II: Crystal chemistry Sample: MSH15a. The Canadian Mineralogist, 41, pp. 27-54.
Formula: F0.5 H4 K1.952 Mg0.066 Mn6.078 Na0.781 Nb0.812 O30 Si8 Ti1.188
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: F Mg Mn7 Na2 Nb2 O30 Si8 Ti2 (F Mg Mn7 Na2 Nb2 O30 Si8 Ti2)
Multiplicity: 1