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Crystallographic and Optical Properties of Ba(Co1-xZnx)SiO4 (x = 0.2, 0.4, 0.6, 0.8)



Rola M. Derbeshi, Winnie Wong-Ng, Jude Anike, Wei Fang Liu, Nacole B. King, Shouyu Wang, James A. Kaduk, Yucheng Lan


Structural characterization and X-ray reference powder pattern determination have been condcuted for the Co- and Zn-containing tridymite derivatives Ba(Co1-xZnx)SiO4 (x = 0.2, 0.4, 0.6, 0.8). The bright blue series of Ba(Co1-xZnx)SiO4 crystallized in the hexagonal P63 space group (No. 173), with Z = 6. While the lattice parameter ‘a' decreases from 9.126 (2) Å to 9.10374(6) Å from x = 0.2 to 0.8, the lattice parameter ‘c', on the other hand, increases from 8.69477(12) Å to 8.72200(10) Å, respectively. Apparently, despite the similarity of ionic sizes of Zn2+ and Co2+, these opposing trends are due to the framework tetrahedral tilting of (ZnCo)O4. The lattice volume, V, remains comparable between 626.27 Å3 and 626.017 (7) Å3 from x = 0 to x = 0.8. UV-visible absorption spectrum measurements indicate the band gap of these materials to be around 3.3 eV and 3.5 eV, therefore potential UV photocatalysts materials. Reference powder X-ray diffraction patterns of these compounds have been submitted to be included in the Powder Diffraction File (PDF).
Powder Diffraction


Reference powder X-ray diffraction patterns, crystal structure, stuff tridymite derivatives, Ba(Co1-xZnx)SiO4 (x=0.2, 0.4, 0.6, 0.8), Powder Diffraction File (PDF), UV-visible spectrum


Derbeshi, R. , Wong-Ng, W. , Anike, J. , Liu, W. , King, N. , Wang, S. , Kaduk, J. and Lan, Y. (2019), Crystallographic and Optical Properties of Ba(Co1-xZnx)SiO4 (x = 0.2, 0.4, 0.6, 0.8), Powder Diffraction, [online],, (Accessed March 4, 2024)
Created June 19, 2019, Updated October 12, 2021