AM_Pumpellyite-(Al)_1 Formula: Ca2 Al2.75 Fe.125 Mg.125 Si3 O14 Name: Pumpellyite-(Al) Unit cell: 8.818 5.898 19.126 90.0 97.26 90.0 , V=986.74 Space group: A12/M1 (12)

Hatert F , Pasero M , Perchiazzi N , Theye T , European Journal of Mineralogy , 19 (2007) p.247-253, Pumpellyite-(Al), a new mineral from Bertrix, Belgian Ardennes, Locality: Bertrix, Ardennes mountains, Belgium