AM_Pumpellyite-(Mn2+) Formula: Si3 Mg.178 Al1.97 Mn.852 Ca2 O14 H4 Name: Pumpellyite-(Mn2+) Unit cell: 8.851 5.9345 19.1247 90.0 96.969 90.0 , V=997.13 Space group: A12/M1 (12)

Artioli G , Pavese A , Bellotto M , Collins S P , Lucchetti G , American Mineralogist , 81 (1996) p.603-610, Mn crystal chemistry in pumpellyite: A resonant scattering powder diffraction, Rietveld study using synchrotron radiation, Sample: SN1