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: Al0.196 Ca0.069 Fe0.409 Mg1.49 O6 Si1.85
Chemical name:(Ca.069 Mg1.490 Fe.332 Fe.077 Al.046 Al.150 Si1.850) O6