AM_Orthopinakiolite Formula: Mn10.446 Mg11.384 Fe1.76 B8 O40 Name: Orthopinakiolite Unit cell: 18.357 12.591 6.068 90.0 90.0 90.0 , V=1402.51 Space group: PNNM (58)

Takeuchi Y , Haga N , Kato T , Miura Y , The Canadian Mineralogist , 16 (1978) p.475-485, Orthopinakiolite, Me2.95O2[BO3]: its crystal structure, and relationship to pinakiolite, Me2.90O2[BO3], Note: z-coordinate of O9 changed. y-coordinate of M7* changed.