Citation: Robbins, C.; Perloff, A.; Block, S. (1966). Crystal structure of Ba Ge Ge3 O9 and its relation to benitoite. Journal of Research of the National Bureau of Standards, Section A. Physics and Chemistry, 70, pp. 385-391.
Formula: Ba Ge4 O9
Chemical name: Ba Ge Ge3 O9
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Ge12 O27 (Ge4 O9)
Multiplicity: 1
Coordination sequences: