ORCID Identifier(s)

0000-0003-3028-5767

Graduation Semester and Year

2022

Language

English

Document Type

Thesis

Degree Name

Master of Science in Chemistry

Department

Chemistry and Biochemistry

First Advisor

Robin Macaluso

Abstract

LnCrTeO6 (La, Pr, Nd) compounds are suspected to appear as vibrant blue-green colored materials. LnCrTeO6 (La, Pr, Nd) were synthesized to analyze the local coordination environments of Ln3+, Cr3+, and Te6+ cations. Structural characterization was performed using X-ray diffraction (XRD) and optical properties were examined using diffuse reflectance spectroscopy (DRS). DRS data was further processed using the Kubelka-Munk function and a Tauc plot was generated to determine the direct and indirect band gap of these semiconducting materials. The superstructure peak corresponding to the (101) plane displayed relatively weak intensities in all samples and decreased in intensity from La to Nd. The (002) and (100) peak intensities varied across the samples. All cation octahedra displayed distorted bond lengths and angles. In each sample, the Cr–O bond lengths were atypical of Cr (III) bond lengths; values were closer to Cr(IV)–O bond distances, suggesting, the possible presence of Cr(IV) in LnCrTeO6 (La, Pr, Nd).

Keywords

Tellurate, Rare earth, Octahedral distortion, Pigment

Disciplines

Chemistry | Physical Sciences and Mathematics

Comments

Degree granted by The University of Texas at Arlington

Included in

Chemistry Commons

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