Citation: Rastsvetaeva, R.K.; Stefanovich, S.Yu.; Pushcharovskii, D.Yu.; Bolotina, N.B.; Nadezhina, T.N.; Dimitrova, O.V. (1994). K4 (Nb O)2 (Si8 O21): synthesis, structure and properties. Kristallografiya, 39, pp. 1001-1008.
Formula: K4 Nb2 O23 Si8
Chemical name: K4 (Nb O)2 (Si8 O21)
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Nb10 O115 Si40 (Nb2 O23 Si8)
Multiplicity: 1
Coordination sequences: