AM_Sursassite_1 Formula: Mn1.9 Ca.21 Al2.89 Si3 O14 H3 Name: Sursassite Unit cell: 8.697 5.787 9.769 90.0 108.91 90.0 , V=465.13 Space group: P121/M1 (11)

Hatert F , Fransolet A M , Wouters J , Bernhardt H J , European Journal of Mineralogy , 20 (2008) p.993-998, The crystal structure of sursassite from the Lienne Valley,, Stavelot Massif, Belgium, Locality: Lienne syncline, Stravelot Massif, Belgium