Citation: Sueno, S.; Matsuura, S.; Gibbs, G. V.; Boisen, M. B. (1998). A crystal chemical study of protoanthophyllite: orthoamphiboles with the protoamphibole structure Sample: PMFA Yokene Mine. Physics and Chemistry of Minerals, 25, pp. 366-377.
Formula: Fe4.699 H2 Mg0.901 Mn1.4 O24 Si8
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Fe14 Mg10 Mn4 O48 Si16 (Fe7 Mg5 Mn2 O24 Si8)
Multiplicity: 1