AM_Na2SiSi2O7 Formula: Si3 Na2 O7 Name: Na2SiSi2O7 Unit cell: 8.922 4.849 11.567 90.0 102.64 90.0 , V=488.29 Space group: C12/C1 (15)

Fleet M E , Henderson G S , Physics and Chemistry of Minerals , 22 (1995) p.383-386, Soidium trisilicate: A new high-pressure silicate structure (Na2Si[Si2O7])