AM_Polyphite Formula: Na8.74 Ca1.4 Mn.68 Sr.03 Mg.3 Ti1.41 Nb.19 Zr.185 Fe.065 P3 Si2 O21 F2 Name: Polyphite Unit cell: 5.3933 7.0553 26.451 95.216 93.49 90.101 , V=1000.44 Space group: P-1 (2)

Sokolova E , Hawthorne F C , Khomyakov A P , The Canadian Mineralogist , 43 (2005) p.1527-1544, Polyphite and sobolevite: Revision of their crystal structures, Locality: Khibina-Lovozero alkaline complex, Kola peninsula, Russia