AM_Verplanckite Formula: Ba6 (Mn2.082 Ti.768 Fe.15) Si6 O19 Cl4.6 H.5 Name: Verplanckite Unit cell: 16.398 16.398 7.2 90.0 90.0 120.0 , V=1676.66 Space group: P6/MMM (191)

Kampf A R , Khan A A , Baur W H , Acta Crystallographica, Section B , 29 (1973) p.2019-2021, Barium chloride silicate with an open framework: verplanckite, Locality: Esquire No. 7 mine, Big Creek, Fresno County, California, USA