AM_Eakerite Formula: Sn Ca2 Al2 Si6 O22 H6 Name: Eakerite Unit cell: 15.892 7.721 7.438 90.0 101.34 90.0 , V=894.84 Space group: P121/A1 (14)

Kossiakoff A A , Leavens P B , American Mineralogist , 61 (1976) p.956-962, The crystal structure of eakerite, a calcium-tin silicate, Note: z-coordinate of Si2 altered