Citation: Belokoneva, E.L.; Mill', B.V.; Butashin, A.V. (1993). Crystal structure of a new circled germanate K3.8Nb5(Ge3O9)O11.4. Zhurnal Neorganicheskoi Khimii, 38, pp. 1455-1460.
Formula: Ge3 K3.8 Nb5 O20.4
Chemical name: K3.8 Nb5 (Ge3 O9) O11.4
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Ge12 Nb20 O84 (Ge3 Nb5 O21)
Multiplicity: 1
Coordination sequences: