Structural and optical properties of Ba(Co1−xZnx)SiO4 (x = 0.2, 0.4, 0.6, 0.8). Issue 3 (September 2019)

• Record Type: Journal Article
• Authors: Anike, J.; Derbeshi, R.; Wong-Ng, W.; Liu, W.; Windover, D.; King, N.; Wang, S.; Kaduk, J. A.; Lan, Y.
• Is Part Of: Powder diffraction. Volume 34:Issue 3(2019)
• Page Start: 242
• Page End: 250
• Publication Date: 2019-09
• Subjects: 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, -- UV-visible spectrum; Powder metallurgy -- Periodicals; Materials -- Analysis -- Periodicals; 620.1127
• DOI: 10.1017/S0885715619000447
• Languages: English
• ISSNs: 0885-7156

Abstract

Abstract : Structural characterization and X-ray reference powder pattern determination have been conducted for the Co- and Zn-containing tridymite derivatives Ba(Co1−x Znx )SiO4 ( x = 0.2, 0.4, 0.6, 0.8). The bright blue series of Ba(Co1−x Znx )SiO4 crystallized in the hexagonal P6 3 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 Zn 2+ and Co 2+, these opposing trends are due to the framework tetrahedral tilting of (ZnCo)O4 . The lattice volume, V, remains comparable between 626.27 Å 3 and 626.017 (7) Å 3 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).