AM_Pigeonite_40
Formula: Mg.918 Fe.85 Ca.191 Mn.029 Na.003 Ti.01 Si1.984 Al.016 O6
Name: Pigeonite
Unit cell: 9.71 8.9462 5.248 90.0 108.494 90.0 , V=432.34
Space group: P121/C1 (14)

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