AM_Pigeonite_11 Formula: Mg1.85 Ca.15 Si2 O6 Name: Pigeonite Unit cell: 9.291 8.679 4.963 90.0 102.22 90.0 , V=391.13 Space group: C12/C1 (15)

Nestola F , Tribaudino M , Ballaran T B , American Mineralogist , 89 (2004) p.189-196, High pressure behavior, transformation and crystal structure of synthetic iron-free pigeonite, Sample: P = 6.2 GPa