Citation: Piilonen, P. C.; McDonald, A. M.; Lalonde, A. E. (2003). Insights into astrophyllite-group minerals II: Crystal chemistry Note: sample US5. The Canadian Mineralogist, 41, pp. 27-54.
Formula: F0.5 Fe6.282 H8 K1.858 Na0.697 Nb0.462 O30 Rb0.142 Si8 Ti1.538
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: F Fe7 H4 Na2 Nb2 O30 Si8 Ti2 (F Fe7 H4 Na2 Nb2 O30 Si8 Ti2)
Multiplicity: 1