AM_Pigeonite_9 Formula: Mg1.85 Ca.15 Si2 O6 Name: Pigeonite Unit cell: 9.546 8.732 5.149 90.0 108.12 90.0 , V=407.91 Space group: P121/C1 (14)

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 = 2.6 GPa