Crystal structure and magnetic properties of the binary triuranium pentatelluride U{sub 3}Te{sub 5}

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1998.7857· OSTI ID:669777

Tougait, O; Potel, M; Noel, H ^[1]

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1. Univ. de Rennes I (France). Lab. de Chimie du Solide et Inorganique Moleculaire

The crystal structure of the binary uranium telluride U{sub 3}Te{sub 5} has been determined for the first time from single-crystal X-ray diffraction data. This compound crystallizes with a new structure type, in the orthorhombic space group Pnma (No. 62), with the unit cell parameters a = 16.098(7) {angstrom}, b = 4.210(2) {angstrom}, c = 14.060(4) {angstrom}, Z = 4. The structure has been refined to an agreement index of R(F) = 0.049 and R{sub w}(F) = 0.050 for 50 variables and 1322 observations [I > 3{sigma}(I)]. The three nonequivalent uranium atoms are coordinated to eight tellurium atoms in bicapped trigonal prismatic arrangements. These prisms are stacked along the b axis by sharing their triangular faces and are linked by edge sharing to form a 6-fold capped triprism which is the repeating building unit of the structure. Magnetic measurements reveal ferromagnetic behavior below {approx}120 K with a significant spin reorientation around 45 K. In the paramagnetic region U{sub 3}Te{sub 5} follows a modified Curie-Weiss law with an effective magnetic moment of 2.69 {mu}{sub B}/U atom and {chi}{sub 0} = 3.0316 {times} 10{sup {minus}3} emu/mol.

• OSTI ID: 669777
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 139; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
CURIE-WEISS LAW
FERROMAGNETISM
LATTICE PARAMETERS
MAGNETIC PROPERTIES
PARAMAGNETISM
URANIUM TELLURIDES
X-RAY DIFFRACTION