Citation: Gunter, M.E.; Dyar, M.D.; Twamley, B.; Cornelius, S.; Foit, F.F.jr. (2003). Composition, Fe(3+)/Fe(tot) and crystal structure of non-asbestiform and asbestiform amphiboles from Libby, Montana, USA. American Mineralogist, 88, pp. 1970-1978.
Formula: Al0.06 Ca1.12 F0.37 Fe0.52 H1.63 K0.2 Mg4.46 Mn0.04 Na1.12 O23.63 Si7.96
Chemical name: (K0.20 Na0.28) (Na0.84 Ca1.12 Mn0.04) (Mg4.46 Fe0.52 Al0.02) ((Al0.04 Si7.96) O22) ((O H)1.63 F0.37)
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al20 Ca4 F4 Fe10 H4 Mg10 Mn4 Na4 O48 Si16 (Al10 Ca2 F2 Fe5 H2 Mg5 Mn2 Na2 O24 Si8)
Multiplicity: 1