AM_Alleghanyite
Formula: Mg1.947 Mn2.869 Zn.184 Si2 O9.06 (F.94 H1.06)
Name: Alleghanyite
Unit cell: 4.815 10.574 8.083 108.74 90.0 90.0 , V=389.72
Space group: P21/B11 (14)

Francis C A , American Mineralogist , 70 (1985) p.182-185, Crystal structure refinement of magnesian alleghanyite, Locality: Sterling mine, Ogdensburg, New Jersey, USA