AM_Kushiroite
Formula: Si Al2 Ca O6
Name: Kushiroite
Unit cell: 9.609 8.652 5.274 90.0 106.06 90.0 , V=421.35
Space group: C12/C1 (15)

Okamura F P , Ghose S , Ohashi H , American Mineralogist , 59 (1974) p.549-557, Structure and crystal chemistry of calcium Tschermak s pyroxene, CaAlAlSiO6