Citation: Whittaker, E. J. W. (1949). The structure of bolivian crocidolite. Acta Crystallographica, 2, pp. 312-317.
Formula: Al0.11 Ca0.17 Fe2.14 H2 K0.13 Mg3.06 Na1.38 O24 Si7.94
Chemical name: (Na1.38 K0.13 Ca0.17 Mg0.25) (Mg2.81 Fe1.66 Fe0.48 Al0.05) (Si7.94 Al0.06) O22 (O H)2
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al20 Fe10 Mg10 O48 Si16 (Al10 Fe5 Mg5 O24 Si8)
Multiplicity: 1