AM_Pigeonite_18 Formula: Mg.917 Fe.851 Ca.191 Mn.029 Na.003 Ti.01 Si1.984 Al.016 O6 Name: Pigeonite Unit cell: 9.7104 8.9417 5.2476 90.0 108.479 90.0 , V=432.14 Space group: P121/C1 (14)

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