AM_Na18Ca11Si6O14_1
Formula: Si6 Na1.8 Ca1.11 O14
Name: Na1.8Ca1.1Si6O14
Unit cell: 7.903 7.903 4.595 90.0 90.0 120.0 , V=248.54
Space group: P321 (150)

Gasparik T , Parise J B , Eiben B A , Hriljac J A , American Mineralogist , 80 (1995) p.1269-1276, Stability and structure of a new high-pressure silicate, Na1.8Ca1.1Si6O14, Sample: data collected on an image plate, Note: U(2,3) for Si2, Na/Ca altered to match symmetry constraints.