AM_Sursassite Formula: Mg2.42 Al2.58 Si3 O14 H3.42 Name: Sursassite Unit cell: 8.5424 5.7117 9.6484 90.0 108.298 90.0 , V=446.96 Space group: P121/M1 (11)

Gottschalk M , Fockenberg T , Grevel K-D , Wunder B , Wirth R , Schreyer W , Maresch W V , European Journal of Mineralogy , 12 (2000) p.935-945, Crystal structure of the high-pressure phase Mg4(MgAl)Al4[Si6O21/(OH)7]:, an analogue of sursassite, Sample: A53