Citation: Kawahara, A.; Ohno, M.; Takano, Y. (1972). Structural study of the amphibole in volcanic tuff. Scientific Papers of the College of General Education, University of Tokyo, 22, pp. 67-68.
Formula: Al1.9 Ca1.7 Fe1.5 H1.5 K0.3 Mg3.3 Na0.6 O24 Si6.4 Ti0.2
Chemical name: (K0.3 Na0.6) (Ca1.7 Mg0.3) (Mg3 Fe Fe0.5 Al0.3 Ti0.2) (Al1.6 Si6.4 O22.5 (O H)1.5)
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al26 Fe10 Mg10 O48 Si16 Ti10 (Al13 Fe5 Mg5 O24 Si8 Ti5)
Multiplicity: 1