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Structural and optical properties of Ba(Co1−xZnx)SiO4 (x = 0.2, 0.4, 0.6, 0.8)

Published online by Cambridge University Press:  20 June 2019

J. Anike ,
R. Derbeshi ,
W. Wong-Ng ,
W. Liu ,
D. Windover ,
N. King ,
S. Wang ,
J. A. Kaduk Open the ORCID record for J. A. Kaduk [Opens in a new window]  and
Y. Lan
J. Anike
Affiliation:
Mechanical Engineering Department, Catholic University of America, Washington DC 20060, USA
R. Derbeshi
Affiliation:
Physics Department, Morgan State University, Baltimore, MD 21251, USA
W. Wong-Ng*
Affiliation:
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
W. Liu
Affiliation:
Physics Department, Tianjin University, Tianjin, China
D. Windover
Affiliation:
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
N. King
Affiliation:
Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
S. Wang
Affiliation:
Physics Department, Tianjin Normal University, Tianjin, China
J. A. Kaduk
Affiliation:
Department of Chemistry, Illinois Institute of Technology, Chicago, IL 60616, USA Department of Physics, North Central College, Naperville IL 60540, USA
Y. Lan
Affiliation:
Physics Department, Morgan State University, Baltimore, MD 21251, USA
*
a)Author to whom correspondence should be addressed. Electronic mail: winnie.wong-ng@nist.gov
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Abstract

Structural characterization and X-ray reference powder pattern determination have been conducted 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” 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 two materials to be ≈3.3 and ≈3.5 eV, respectively, therefore potential UV photocatalytic materials. Reference powder X-ray diffraction patterns of these compounds have been submitted to be included in the Powder Diffraction File (PDF).

Keywords

Reference powder X-ray diffraction patternscrystal structurestuff tridymite derivativesBa(Co1−xZnx)SiO4 (x = 0.2, 0.4, 0.6, 0.8)Powder Diffraction FileUV-visible spectrum
Type
Technical Article
Information
Powder Diffraction , Volume 34 , Issue 3 , September 2019 , pp. 242 - 250
Copyright
Copyright © International Centre for Diffraction Data 2019 

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