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 iron px after Redhammer et al. (2001)
with O3-O3-O3 angle = 180.8 and model oxygen radius = 1.287
_database_code_amcsd 0003491
9.695 8.919 5.149 90 110.9 90 C2/c
atom     x      y      z
Fe       0  11/12    1/4
Li       0    .25    1/4
Si   .3080   1/12  .2900
O1   .1340   1/12  .1732
O2   .3660    .25  .3268
O3   .3660 -.0010  .0799