Pyroxene-ideal
Thompson R M, Downs R T
American Mineralogist 89 (2004) 614-628
Model pyroxenes II: Structural variation as a function of tetrahedral rotation
model lithium scandium px after Hawthorne and Grundy (1977)
with O3-O3-O3 angle = 175.6 and model oxygen radius = 1.313
_database_code_amcsd 0003494
9.838 9.092 5.249 90 110.1 90 C2/c
atom     x      y      z
Sc       0  11/12    1/4
Li       0    .25    1/4
Si   .3080   1/12  .2819
O1   .1339   1/12  .1697
O2   .3661    .25  .3303
O3   .3661  .0055  .0638