AM_Rengeite_1 Formula: (Sr3.842 Ce.158) Zr Ti3.7 Al.1 Fe.2 Si4 O22 Name: Rengeite Unit cell: 13.983 5.6722 11.996 90.0 114.215 90.0 , V=867.74 Space group: P121/A1 (14)

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