AM_Pigeonite_13 Formula: Mg.922 Fe.844 Ca.192 Mn.028 Na.003 Ti.01 Si1.984 Al.016 O6 Name: Pigeonite Unit cell: 9.7093 8.9417 5.2479 90.0 108.507 90.0 , V=432.05 Space group: P121/C1 (14)

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