AM_Beudantite Formula: Pb1.002 (As1.07 S.93) (Fe2.541 Al.459) O14 Name: Beudantite Unit cell: 7.315 7.315 17.0355 90.0 90.0 120.0 , V=789.43 Space group: R-3M (166)

Szymanski J T , The Canadian Mineralogist , 26 (1988) p.923-932, The crystal structure of beudantite, Pb(Fe,Al)3((As,S)O4)2(OH)6