AM_Matsubaraite Formula: Sr4 Ti5 Si4 O22 Name: Matsubaraite Unit cell: 13.85 5.631 11.892 90.0 114.143 90.0 , V=846.32 Space group: C12/M1 (12)

Miyajima H , Miyawaki R , Ito K , European Journal of Mineralogy , 14 (2002) p.1119-1128, Matsubaraite, Sr4Ti5(Si2O7)2O8, a new mineral, the Sr-Ti analogue, of perrierite in jadeitite from the Itoigawa-Ohmi district,, Niigata Prefecture, Japan, Locality: Itoigawa-Ohmi district, Niigata Prefecture, Japan