Synthesis, crystal structures, magnetic and electric transport properties of Eu{sub 11}InSb{sub 9} and Yb{sub 11}InSb{sub 9}

Journal Article · Sun Jul 15 04:00:00 EDT 2007 · Journal of Solid State Chemistry

OSTI ID:21015877

Shengqing, Xia ^[1]; Hullmann, Jonathan ^[1]; Bobev, Svilen ^[1]; Ozbay, Arif ^[2]; Nowak, Edmund R ^[2]; Fritsch, Veronika ^[3]

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1. Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (United States)
2. Department of Physics and Astronomy, University of Delaware, Newark, DE 19716 (United States)
3. Physikalisches Institut, Universitaet Karlsruhe (Thailand), 76128 Karlsruhe (Germany)

Two new rare-earth metal containing Zintl phases, Eu{sub 11}InSb{sub 9} and Yb{sub 11}InSb{sub 9} have been synthesized by reactions of the corresponding elements in molten In metal to serve as a self-flux. Their crystal structures have been determined by single crystal X-ray diffraction-both compounds are isostructural and crystallize in the orthorhombic space group Iba2 (No. 45), Z=4 with unit cell parameters a=12.224(2) A, b=12.874(2) A, c=17.315(3) A for Eu{sub 11}InSb{sub 9}, and a=11.7886(11) A, b=12.4151(12) A, c=16.6743(15) A for Yb{sub 11}InSb{sub 9}, respectively (Ca{sub 11}InSb{sub 9}-type, Pearson's code oI84). Both structures can be rationalized using the classic Zintl rules, and are best described in terms of discrete In-centered tetrahedra of Sb, [InSb{sub 4}]{sup 9-}, isolated Sb dimers, [Sb{sub 2}]{sup 4-}, and isolated Sb anions, Sb{sup 3-}. These anionic species are separated by Eu{sup 2+} and Yb{sup 2+} cations, which occupy the empty space between them and counterbalance the formal charges. Temperature-dependent magnetic susceptibility and resistivity measurements corroborate such analysis and indicate divalent Eu and Yb, as well as poorly metallic behavior for both Eu{sub 11}InSb{sub 9} and Yb{sub 11}InSb{sub 9}. The close relationships between these structures and those of the monoclinic {alpha}-Ca{sub 21}Mn{sub 4}Sb{sub 18} and Ca{sub 21}Mn{sub 4}Bi{sub 18} are also discussed. - Graphical abstract: Reported are the synthesis, the structure and the magnetic and electronic properties of two new rare-earth Zintl phases, Eu{sub 11}InSb{sub 9} and Yb{sub 11}InSb{sub 9}. The close relationships between these structures and those of the monoclinic {alpha}-Ca{sub 21}Mn{sub 4}Sb{sub 18} and Ca{sub 21}Mn{sub 4}Bi{sub 18} are also discussed.

• OSTI ID: 21015877
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 7 Vol. 180; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ANTIMONIDES
ANTIMONY IONS
EUROPIUM COMPOUNDS
EUROPIUM IONS
INDIUM COMPOUNDS
MAGNETIC SUSCEPTIBILITY
MONOCLINIC LATTICES
MONOCRYSTALS
ORTHORHOMBIC LATTICES
SPACE GROUPS
SYNTHESIS
TEMPERATURE DEPENDENCE
X-RAY DIFFRACTION
YTTERBIUM COMPOUNDS
YTTERBIUM IONS