Citation: Takeda, H. (1972). Crystallographic Studies of Coexisting Aluminan Orthopyroxene and Augite of High-Pressure Origin. Journal of Geophysical Research, 77, pp. 5798-5811.
Formula: Al0.42 Ca0.818 Fe0.269 Mg0.792 O6 Si1.731
Chemical name: Ca.818 Mg.792 Fe.183 Fe.086 Al.151 Al.269 Si1.731 O6
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al12 Ca4 Fe12 Mg8 O24 Si8 (Al3 Ca Fe3 Mg2 O6 Si2)
Multiplicity: 1