Citation: Yang, H.; Konzett, J.; Frost, D. J.; Downs, R. T. (2009). X-ray diffraction and Raman spectroscopic study of clinopyroxenes with six-coordinated Si in the Na(Mg0.5Si0.5)Si2O6 - NaAlSi2O6 system Note: Sample J3. American Mineralogist, 94, pp. 942-949.