AM_Perraultite Formula: Ba2.5 K1.2 Na3 Ca Fe6.1 Mn9.4 Zr.3 Ti7.68 Nb.32 Si16 O72 F4 H8 Name: Perraultite Unit cell: 10.731 13.841 20.845 90.0 95.06 90.0 , V=3084.00 Space group: C121 (5)

Yamnova N A , Egorov-Tismenko Y K , Pekov I V , Crystallography Reports , 43 (1998) p.401-410, Crystal structure of perraultite from the coastal region of the Sea of Azov, Locality: Sea of Azov, Mariupol massif, Ukraine