AM_Pigeonite_28
Formula: Mg.919 Fe.848 Ca.191 Mn.029 Na.003 Ti.01 Si1.984 Al.016 O6
Name: Pigeonite
Unit cell: 9.706 8.94 5.246 90.0 108.504 90.0 , V=431.67
Space group: P121/C1 (14)

Domeneghetti M C , Zema M , Tazzoli V , American Mineralogist , 90 (2005) p.1816-1823