Thompson R M, Downs R T
American Mineralogist 89 (2004) 614-628
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
_database_code_amcsd 0003481
9.607 8.939 5.161 90 108.3 90 C2/c
atom x y z
Mg 0 11/12 1/4
Ca 0 .25 1/4
Si .3083 1/12 .2632
O1 .1333 1/12 .1611
O2 .3667 .25 .3389
O3 .3667 .0208 .0264
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