Structure, magnetic and electrical properties of CeIrSb and its hydride CeIrSbH{sub 0.8}

Journal Article · Wed Jul 15 04:00:00 EDT 2009 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2009.04.031· OSTI ID:21370489

Gaudin, Etienne; Chevalier, Bernard ^[1]; Hermes, Wilfried; Rodewald, Ute Ch ^[2]; Poettgen, Rainer ^[2]

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1. CNRS, Universite de Bordeaux, ICMCB, 87 avenue du Docteur Albert Schweitzer, 33608 Pessac Cedex (France)
2. Institut fuer Anorganische und Analytische Chemie, Westfaelische Wilhelms-Universitaet Muenster, Corrensstrasse 30, 48149 Muenster (Germany)

The ternary antimonide CeIrSb absorbs hydrogen under moderate temperature and pressure conditions (4 MPa and 573 K), leading to the hydride CeIrSbH{sub 0.8}. The crystal structures of both compounds have been investigated by X-ray diffraction on powders and single crystals: TiNiSi type, space group Pnma, a=735.07(7), b=456.93(4), c=792.8(1) pm, R1/wR2=0.0206/0.0395, 601 F{sup 2} values for CeIrSb and a=728.16(14), b=460.35(6), c=825.87(2) pm, R1/wR2=0.0322/0.0735, 528 F{sup 2} values for CeIrSbH{sub 0.8} with 20 variables per refinement. Hydrogenation induces both an increase of the cell volume V (+4%) and a strongly anisotropic expansion of the unit cell with a maximum of 4.3% in the c direction, leading to a significant increase of the Ce-Ir and Ce-Ce distances in this direction. The H-insertion into CeIrSb leads to a magnetic transition from intermediate valence to antiferromagnetic behavior (T{sub N}=7.0 K) evidenced by magnetization, electrical resistivity and specific heat measurements. This transition can be explained on the basis of the Doniach diagram considering the J{sub cf} interaction between the 4f(Ce) and conduction electrons. - Graphical Abstract: Cerium coordination in CeIrSb and CeIrSbH{sub 0.8}.

• OSTI ID: 21370489
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 7 Vol. 182; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALLOYS
ANISOTROPY
ANTIFERROMAGNETISM
ANTIMONY ALLOYS
ANTIMONY COMPOUNDS
ANTIMONY HYDRIDES
CERIUM ALLOYS
CERIUM COMPOUNDS
CERIUM HYDRIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGENATION
INTERMETALLIC COMPOUNDS
IRIDIUM ALLOYS
MAGNETISM
MONOCRYSTALS
NONMETALS
ORTHORHOMBIC LATTICES
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
PRESSURE RANGE
PRESSURE RANGE MEGA PA
PRESSURE RANGE MEGA PA 01-10
RARE EARTH ALLOYS
RARE EARTH COMPOUNDS
SCATTERING
SPACE GROUPS
SPECIFIC HEAT
SYMMETRY GROUPS
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT ALLOYS
X-RAY DIFFRACTION