AM_Orthopyroxene_6 Formula: Fe.967 Mg.923 Ca.01 Mn.016 Al.236 Si1.848 O6 Name: Orthopyroxene Unit cell: 18.1427 8.746 5.1716 90.0 90.0 90.0 , V=820.61 Space group: PBCA (61)

Nestola F , Ballaran T B , Balic-Zunic T , Secco L , Dal Negro A , American Mineralogist , 93 (2008) p.644-652, The high-pressure behavior of an Al- and Fe-rich natural orthopyroxene, Sample: P = 3.947 GPa