AM_Graeserite Formula: Pb.14 (Fe4 Ti3) As O14 H Name: Graeserite Unit cell: 5.0053 14.272 7.1736 90.0 105.165 90.0 , V=494.61 Space group: C12/M1 (12)

Berlepsch P , Armbruster T , Schweizerische Mineralogische und Petrographische Mitteilungen , 78 (1998) p.1-9, The crystal structure of Pb2+-bearing graeserite, Pb0.14(Fe,Ti)7AsO12+x(OH)2-x,, a mineral of the derbylite group, Locality: Gorb, Binn valley, Western Alps, Switzerland