AM_Rengeite Formula: (Sr3.846 Ce.154) Zr Ti3.68 Al.1 Fe.22 Si4 O22 Name: Rengeite Unit cell: 13.983 5.6722 11.996 90.0 114.215 90.0 , V=867.74 Space group: C12/M1 (12)

Miyawaki R , Matsubara S , Miyajima H , Journal of Mineralogical and Petrological Sciences , 97 (2002) p.7-12, The crystal structure of rengeite, Sr4ZrTi4(Si2O7)2O8, Locality: Itoigawa, Niigata Prefecture, Japan, Sample: C2/m refinement