AM_Pumpellyite-(Mg)_1 Formula: Al2.71 Mg.45 Fe.15 Ca1.9 Si2.79 O14 H3 Name: Pumpellyite-(Mg) Unit cell: 8.83 5.9 19.17 90.0 97.12 90.0 , V=991.00 Space group: A12/M1 (12)

Galli E , Alberti A , Acta Crystallographica, Section B , 25 (1969) p.2276-2281, On the crystal structure of pumpellyite