Citation: McCormick, T. C. (1986). Crystal-chemical aspects of nonstoichiometric pyroxenes Sample: Full-occupancy model. American Mineralogist, 71, pp. 1434-1440.
Formula: Al0.931 Ca0.229 Fe0.069 Na0.77 O6 Si2
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al4 Fe4 O24 Si8 (Al Fe O6 Si2)
Multiplicity: 1