AM_Scawtite_1 Formula: Ca7 Si6 C O23 H4 Name: Scawtite Unit cell: 6.631 15.195 10.121 90.0 100.59 90.0 , V=1002.40 Space group: I1M1 (8)

Grice J D , The Canadian Mineralogist , 43 (2005) p.1489-1500, The structure of spurrite, tilleyite and scawtite,, and relationships to other silicate-carbonate minerals, Locality: Scawt Hill, near Larne, County Antrim, Ireland