AM_Kilchoanite_1 Formula: Ca2.33 Mn.67 Si2 O7 Name: Kilchoanite Unit cell: 11.356 5.007 21.817 90.0 90.0 90.0 , V=1240.50 Space group: I2CM (46)

Kimata M , Mineralogical Magazine , 53 (1989) p.625-631, The crystal structure of manganoan kilchoanite, Ca2.33Mn0.67Si2O7:, a site preference rule for the substitution of Mn for Ca