AM_Na4Ge9O20
Formula: Na4 Ge8.5 O20
Name: Na4Ge9O20
Unit cell: 15.0263 15.0263 7.3971 90.0 90.0 90.0 , V=1670.19
Space group: I141/A1 (1)

Fleet M E , Acta Crystallographica, Section C , 46 (1990) p.1202-1204, Refinement of the structure of sodium enneagermanate (Na4Ge9O20)