Hydrothermal syntheses, structures, and magnetic properties of (NH{sub 4}){sub 2}NaVF{sub 6} and Na{sub 3}VF{sub 6}

Journal Article · Sat Aug 15 00:00:00 EDT 2009 · Journal of Solid State Chemistry

OSTI ID:21370541

Lijie, He; Hongming, Yuan; Keke, Huang; Chen, Yan; Guanghua, Li; Qiaoru, He; Yang, Yu ^[1]

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1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012 (China)

The single crystals of perovskite fluorides (NH{sub 4}){sub 2}NaVF{sub 6} and Na{sub 3}VF{sub 6} were synthesized under mild hydrothermal conditions. The structures of the compounds were determined by means of single-crystal and powder X-ray diffraction analyses, respectively. (NH{sub 4}){sub 2}NaVF{sub 6} has a cubic elpasolite-type structure and crystallizes in the space group Fm3-bar m with lattice constant a=8.495(0) A. Rietveld refinement indicates that Na{sub 3}VF{sub 6} has a monoclinic structure and is in space group P2{sub 1}/n. The compounds were characterized by scanning electron microscopy, thermogravimetric and differential thermal analysis, and variable temperature magnetic susceptibility. With the temperature decreasing, the magnetic studies of the compounds showed the magnetic ordering was related to the crystallographic features and isolated magnetic units. - Graphical Abstract: The single crystals of perovskite fluorides (NH{sub 4}){sub 2}NaVF{sub 6} and Na{sub 3}VF{sub 6} were synthesized under mild hydrothermal conditions. (NH{sub 4}){sub 2}NaVF{sub 6} has a cubic elpasolite-type structure and crystallizes in the space group Fm3-barm with lattice constant a=8.495(0) A. The compound of Na{sub 3}VF{sub 6} has a monoclinic structure and in space group P2{sub 1}/n. The hydrothermal synthesis, structural characterization and magnetic properties of the two compounds were investigated.

• OSTI ID: 21370541
• Journal Information: Journal of Solid State Chemistry, Vol. 182, Issue 8; Other Information: DOI: 10.1016/j.jssc.2009.03.024; PII: S0022-4596(09)00137-6; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMMONIUM COMPOUNDS
CRYSTALLOGRAPHY
DIFFERENTIAL THERMAL ANALYSIS
FLUORIDES
HYDROTHERMAL SYNTHESIS
LATTICE PARAMETERS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MONOCLINIC LATTICES
MONOCRYSTALS
PEROVSKITE
SCANNING ELECTRON MICROSCOPY
SODIUM COMPOUNDS
SPACE GROUPS
THERMAL GRAVIMETRIC ANALYSIS
VANADIUM COMPOUNDS
X-RAY DIFFRACTION
ALKALI METAL COMPOUNDS
CHEMICAL ANALYSIS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
ELECTRON MICROSCOPY
FLUORINE COMPOUNDS
GRAVIMETRIC ANALYSIS
HALIDES
HALOGEN COMPOUNDS
MAGNETIC PROPERTIES
MICROSCOPY
MINERALS
OXIDE MINERALS
PEROVSKITES
PHYSICAL PROPERTIES
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SYMMETRY GROUPS
SYNTHESIS
THERMAL ANALYSIS
TRANSITION ELEMENT COMPOUNDS