Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Crystal Chemistry and X-ray Diffraction Patterns for Co(NixZn1-x)Nb4O12 (x=0.2, 0.4, 0.6, 0.8)



Winnie K. Wong-Ng, Guangyao Liu, James A. Kaduk


X-ray reference powder patterns and structures have been determined for a series of titanium-, zinc-, and cobalt-containing niobates, Co(NixZn1-x)Nb4O12 (x=0.2, 0.4, 0.6, 0.8). The Co(NixZn1-x)Nb4O12 series crystallize in the space group of Pbcn, which is of the disordered columbite structure type (Alpha-PbO2). The lattice parameters range from a = 14.11190(13) Å to 14.1569(3) Å, b = 5.69965(6) Å to 5.71209(13)Å, c = 5.03332(5)Å to 5.03673(11)Å, and V = 404.844(8) Å3 to V = 407.296(17) Å3 from x = 0.8 to x = 0.2, respectively. Co(NixZn1-x)Nb4O12 contains double zig-zag chains of NbO6 octahedra and single chain of (Ni,Zn,Co)O6 octahedra run parallel to the bc-plane. Within the same chain the NbO6 octahedra share edges, while the adjacent NbO6 chains are joined to each other through common oxygen corners. These double NbO6 chains are further linked together along the [100] direction through another (Co,Ni,Zn)O6 units, via common oxygen corners. The edge-sharing (Co,Ni,Zn)O6 also form zig-zag chains along the c-axis. Powder X-ray diffraction patterns of this series of compounds have been submitted to be included in the Powder Diffraction File (PDF).
Powder Diffraction


Co(NixZn1-x)Nb4O12, columbite structure type, Powder X-ray diffraction patterns, thermoelectric oxides


Wong-Ng, W. , Liu, G. and Kaduk, J. (2016), Crystal Chemistry and X-ray Diffraction Patterns for Co(NixZn1-x)Nb4O12 (x=0.2, 0.4, 0.6, 0.8), Powder Diffraction, [online], (Accessed May 29, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created December 15, 2016, Updated November 10, 2018