Citation: Hawthorne F C; Oberti R; Sardone N (1996). Sodium at the A site in clinoamphiboles: the effects of composition on patterns of order Sample: A11 - FE229 N.18. The Canadian Mineralogist, 34, pp. 577-593.
Formula: Al1.9 Ca1.78 Cr0.04 F0.04 Fe0.49 H1.96 Mg3.69 Na4.04 O23.96 Si7.04 Ti0.02
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al14 Ca8 Cr4 F4 Fe18 H4 Mg10 Na8 O48 Si16 Ti4 (Al7 Ca4 Cr2 F2 Fe9 H2 Mg5 Na4 O24 Si8 Ti2)
Multiplicity: 1