#35

Cmm2

Example – KNbW₂O₉

Polar Hexagonal Tungsten Bronze-Type Oxides: KNbW₂O₉, RbNbW₂O₉, and KTaW₂O₉

H. Y. Chang, T. Sivakumar, K. M. Ok and P. Shiv Halasyamani
Inorg. Chem., 2008, 47 (19), pp 8511–8517

CIF
https://www.dropbox.com/s/o5aq5f90xrnlaw7/KNbW2O9.cif

Distorted corner-connected W/NbO6 octahedra to built hexagonal channels, in which pottasium ions are located.

3D rotatable model of KNbW₂O₉

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