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 vanadium px after Satto et al. (1997)
with O3-O3-O3 angle = 178.1 and model oxygen radius = 1.284
_database_code_amcsd 0003493
9.648 8.898 5.137 90 110.5 90 C2/c
atom     x      y      z
V        0  11/12    1/4
Li       0    .25    1/4
Si   .3080   1/12  .2857
O1   .1340   1/12  .1713
O2   .3660    .25  .3287
O3   .3660  .0024  .0713