AM_Bustamite Formula: (Mn.64 Ca.36) Si O3 Name: Bustamite Unit cell: 9.807 10.68 7.091 99.58 99.99 83.79 , V=718.83 Space group: I-1 (2)

Ohashi Y , Finger L W , American Mineralogist , 63 (1978) p.274-288, The role of octahedral cations in pyroxenoid crystal chemistry. I. Bustamite,, wollastonite, and the pectolite-schizolite-serandite series, sample Mn-BS, from Mitsuka, Gifu, Japan