AM_Pumpellyite-(Fe2+) Formula: Si3 Al1.837 Fe.841 Mg.322 Ca2 O14 H4 Name: Pumpellyite-(Fe2+) Unit cell: 8.8375 5.952 19.1812 90.0 97.461 90.0 , V=1000.40 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 BU, Locality: Torrente Bulla, Italy