Citation: Genkina, E.A.; Mill', B.V. (1992). Crystal structures of sphens NaSbGeO5, NaTaGeO5 and LiTaSiO5.. Kristallografiya, 37, pp. 1424-1428.
Formula: Ge Na O5 Sb
Chemical name: Na Sb (Ge O4) O
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Ge4 O20 Sb4 (Ge O5 Sb)
Multiplicity: 1
Coordination sequences: