AM_Pumpellyite-(Al)_2 Formula: Si3 Al2.452 Fe.193 Mg.355 Ca2 O14 H4 Name: Pumpellyite-(Al) Unit cell: 8.8193 5.9042 19.1138 90.0 97.433 90.0 , V=986.91 Space group: A12/M1 (12)

Artioli G , Geiger C A , Physics and Chemistry of Minerals , 20 (1994) p.443-453, The crystal chemistry of pumpellyite: An X-ray Rietveld, refinement and 57Fe Mossbauer study, Note: sample HR, Locality: Hicks Ranch, California