Citation: Makino, K.; Tomita, K. (1989). Cation distribution in the octahedral sites of hornblendes sample O-H from Obira, Japan. American Mineralogist, 74, pp. 1097-1105.
Formula: Al1.68 Ca2 Fe4.45 H2 Mg0.55 Na3.96 O24 Si6.32
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al8 Fe10 Mg10 O48 Si16 (Al4 Fe5 Mg5 O24 Si8)
Multiplicity: 1