Citation: Piilonen, P. C.; McDonald, A. M.; Lalonde, A. E. (2003). Insights into astrophyllite-group minerals II: Crystal chemistry Sample: MSH19a. The Canadian Mineralogist, 41, pp. 27-54.
Formula: Ca0.083 F0.5 Fe0.427 H4 K1.958 Mg0.073 Mn5.744 Na0.593 Nb0.708 O30 Si8 Ti1.292
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: F Fe Mg Mn6 Na2 Nb2 O30 Si8 Ti2 (F Fe Mg Mn6 Na2 Nb2 O30 Si8 Ti2)
Multiplicity: 1