AM_Pigeonite_41 Formula: Mg.915 Fe.851 Ca.191 Mn.029 Na.003 Ti.01 Si1.984 Al.016 O6 Name: Pigeonite Unit cell: 9.7103 8.9444 5.249 90.0 108.468 90.0 , V=432.41 Space group: P121/C1 (14)

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