AM_Sursassite_5 Formula: Mn2 Al3 Si3 O14 H3 Name: Sursassite Unit cell: 8.7278 5.8065 9.8121 90.0 109.06 90.0 , V=470.00 Space group: P121/M1 (11)

Nagashima M , Akasaka M , Minakawa T , Libowitzky E , Armbruster T , American Mineralogist , 94 (2009) p.1440-1449, Sursassite: hydrogen bonding, cation order, and pumpellyite intergrowth, Locality: Kamisugai, Japan, Sample Number: 3