Citation: Thompson, R. M.; Downs, R. T. (2004). Model pyroxenes II: Structural variation as a function of tetrahedral rotation model diopside at 5.3 GPa after Levien and Prewitt (1981) with O3-O3-O3 angle = 163.6 and model oxygen radius = 1.304. American Mineralogist, 89, pp. 614-628.