Citation: Clark, J.R.; Papike, J.J.; Appleman, D.E. (1969). Crystal-chemical characterization of clinopyroxenes based on eight new structure refinements. Mineralogical Society of America: Special Papers, 2, pp. 31-50.
Formula: Al0.5 Ca0.5 Fe0.07 Mg0.43 Na0.5 O6 Si2
Chemical name:(Na0.5 Ca0.5) (Mg0.43 Fe0.07 Al0.5) (Si2 O6)