Fe0.087Mg0.913O3Si
Zhang, J. S.Dera, P.Bass, J. D.
American Mineralogist (2012) 97, 1070-1074
a=17.868Å b=8.491Å c=5.0565Å
α=90° β=90° γ=90°
Fe0.093Mg0.908O3Si
a=17.87Å b=8.526Å c=4.9485Å
α=90° β=92.88° γ=90°