Citation: Hawthorne, F.C.; Grungy, H.D. (1978). The crystal chemistry of the amphiboles. VII. The crystal structure and site chemistry of potassium ferri-taramite. Canadian Mineralogist, 16, pp. 53-62.
Formula: Al1.8 Ca1.178 Fe4.07 H3.3 Mg0.92 Mn0.032 Na2.09 O24 Si6.2
Chemical name: Na2.09 Ca1.178 Mn.032 Mg.92 Fe4.07 (Si6.2 Al1.8 O20.7) (O H)3.3
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al16 Ca4 Fe10 Mg10 Mn4 Na4 O48 Si16 (Al8 Ca2 Fe5 Mg5 Mn2 Na2 O24 Si8)
Multiplicity: 1