AM_Sanbornite
Formula: Ba Si2 O5
Name: Sanbornite
Unit cell: 4.63 7.69 13.53 90.0 90.0 90.0 , V=481.73
Space group: PCMN (62)

Douglass R M , American Mineralogist , 43 (1958) p.517-536, The crystal structure of sanbornite, BaSi2O5