AM_Strakhovite Formula: Ba3 Mn4 Na Si6 O22 F H4 Name: Strakhovite Unit cell: 23.42 12.266 7.181 90.0 90.0 90.0 , V=2062.88 Space group: PNMA (62)

Yamnova N A , Puscharovskii D Y , Mernaf T , Kalinin V V , Kalacheva L V , Kristallografiya , 37 (1992) p.345-351, Crystal structure of a new natural Na, Ba, Mn-fluorosilicate