Thompson R M, Downs R T
American Mineralogist 89 (2004) 614-628
Model pyroxenes II: Structural variation as a function of tetrahedral rotation
model sodium scandium px after Ohashi et al. (1994A)
with O3-O3-O3 angle = 173.7 and model oxygen radius = 1.328
_database_code_amcsd 0003499
9.929 9.189 5.305 90 109.8 90 C2/c
atom x y z
Sc 0 11/12 1/4
Na 0 .25 1/4
Si .3081 1/12 .2790
O1 .1339 1/12 .1683
O2 .3661 .25 .3317
O3 .3661 .0079 .0579
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