Lanthanide-containing zirconotitanate solid solutions

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1996.0379· OSTI ID:508631

Shoup, S S; Anovitz, L M; Bamberger, C E ^[1]

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1. Oak Ridge National Lab., TN (United States); and others

Solid solutions between several lanthanide-containing dititanate and dizirconate compounds have been synthesized and identified using X-ray diffraction (XRD). Complete solubility was found in the pyrochlore-pyrochlore-type systems Er{sub 2}Ti{sub 2}O{sub 7}-Nd{sub 2}Zr{sub 2}O{sub 7} and Nd{sub 1.2}Er{sub 0.8}Ti{sub 2}O{sub 7}-Nd{sub 2}Zr{sub 2}O{sub 7}. Some solubility of Nd{sub 2}Ti{sub 2}O{sub 7}, a monoclinic dititanate, in defect fluorite Er{sub 2}Zr{sub 2}O{sub 7} was observed, and it was determined that there is some solubility of Nd{sub 2}Ti{sub 2}O{sub 7} in pyrochlore-type Nd{sub 2}Zr{sub 2}O{sub 7}. The systems Nd{sub 2}Zr{sub 2}O{sub 7}-TiO{sub 2} and Nd{sub 2}Ti{sub 2}O{sub 7}-ZrO{sub 2} also were investigated to help define a region of pyrochlore solid solution formation in the system NdO{sub 1.5}-TiO{sub 2}-ZrO{sub 2}. Additionally, attempts were made to synthesize pyrochlore-type solid solutions between Ce{sub 2}Ti{sub 2}O{sub 7} and Ce{sub 2}Zr{sub 2}O{sub 7} and to substitute titanium with zirconium in the perovskite-type phases SrNd{sub 2}Ti{sub 4}O{sub 12} and Sr{sub 2}Ce{sub 2}Ti{sub 5}O{sub 16}.

• DOE Contract Number: AC05-96OR22464; FG05-88ER13865
• OSTI ID: 508631
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 127; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CERIUM COMPOUNDS
CHEMICAL PREPARATION
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
ERBIUM COMPOUNDS
MONOCLINIC LATTICES
NEODYMIUM COMPOUNDS
SOLID SOLUTIONS
STRONTIUM COMPOUNDS
TITANATES
X-RAY DIFFRACTION
ZIRCONATES