Synthesis of zirconium titanate with an ordered M-fergusonite (beta) structure

Troitzsch, Ulrike, Christy, Andrew G. and Ellis, David J. (2007) Synthesis of zirconium titanate with an ordered M-fergusonite (beta) structure. Journal of Solid State Chemistry, 180 10: 2885-2895. doi:10.1016/j.jssc.2007.08.020


Author Troitzsch, Ulrike
Christy, Andrew G.
Ellis, David J.
Title Synthesis of zirconium titanate with an ordered M-fergusonite (beta) structure
Journal name Journal of Solid State Chemistry   Check publisher's open access policy
ISSN 0022-4596
1095-726X
Publication date 2007-10-01
Sub-type Article (original research)
DOI 10.1016/j.jssc.2007.08.020
Open Access Status Not yet assessed
Volume 180
Issue 10
Start page 2885
End page 2895
Total pages 11
Place of publication Maryland Heights, MO, United States
Publisher Academic Press
Language eng
Formatted abstract
We report a new zirconium titanate compound (Zr,Ti)O2 with 27.5-35 mol% titania (TiO2) formed from the oxides at 35-38 kbar, 1400-1500 °C. Crystal structure investigations at atmospheric conditions with powder X-ray diffraction (XRD) and transmission electron microscopy (TEM) revealed a monoclinic structure related to that of M-fergusonite (beta). Unit-cell dimensions (from 27.5 to 35 mol% TiO2): a=7.267(20)-7.340(2) Å, b=10.435(3)-10.429(1) Å, c=5.023(11)-5.040(1) Å, β=136.45(12)-137.55(1)°, V=262.44(92)-260.40(12) Å3, Z=4. Rietveld refinement (RF=1.55) of a sample with 32.8 mol% TiO2 indicates that site A is 8-fold coordinated, mostly occupied by Zr, while site B has 6-fold average coordination, occupied by Ti and Zr. Site B is at least partly ordered, as indicated by superstructure reflections 0 0 1 and -2 0 1 detected with TEM, reducing the space group from C2/c to C2. Pronounced streaking of selected diffraction spots is linked to the boundaries of lamellar domains in twin orientation, with twin planes either (200) or (20-2). Adjacent lamellae differ slightly in composition, causing subtle asymmetry of the twin diffraction patterns.
Keyword Crystal structure
Fergusonite
Ordering
Twinning
Zirconium titanate
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Earth and Environmental Sciences
 
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