AM_Pigeonite_19 Formula: Mg.917 Fe.85 Ca.191 Mn.029 Na.003 Ti.01 Si1.984 Al.016 O6 Name: Pigeonite Unit cell: 9.712 8.9434 5.2492 90.0 108.479 90.0 , V=432.43 Space group: P121/C1 (14)

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