AM_Pyroxmangite_5 Formula: Mn6.405 Fe.015 Mg.58 Si7 O21 Name: Pyroxmangite Unit cell: 9.62 10.41 17.29 112.0 103.4 83.0 , V=1560.53 Space group: C-1 (2)

Zanazzi P F , Nestola F , Nazzareni S , Comodi P , American Mineralogist , 93 (2008) p.1921-1928, Pyroxmangite: A high pressure single-crystal study, Locality: Yokone-Yama, Awano Town, Tochigi Prefecture, Japan, Pressure = 1.24 GPa