Crystal Structure and Magnetic Properties of the Binary Triuranium Pentatelluride U3Te5
Identifieur interne : 000355 ( France/Analysis ); précédent : 000354; suivant : 000356Crystal Structure and Magnetic Properties of the Binary Triuranium Pentatelluride U3Te5
Auteurs : O. Tougait [France] ; M. Potel [France] ; H. Noël [France]Source :
- Journal of Solid State Chemistry [ 0022-4596 ] ; 1998.
Abstract
The crystal structure of the binary uranium telluride U3Te5has 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 groupPnma(No. 62), with the unit cell parametersa=16.098(7) Å,b=4.210(2) Å,c=14.060(4) Å,Z=4. The structure has been refined to an agreement index ofR(F)=0.049 andRω(F)=0.050 for 50 variables and 1322 observations [I>3σ(I)]. The three nonequivalent uranium atoms are coordinated to eight tellurium atoms in bicapped trigonal prismatic arrangements. These prisms are stacked along thebaxis 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 ≈120 K with a significant spin reorientation around 45 K. In the paramagnetic region U3Te5follows a modified Curie–Weiss law with an effective magnetic moment of 2.69μB/U atom andχ0=3.0316×10−3emu/mol.
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DOI: 10.1006/jssc.1998.7857
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This compound crystallizes with a new structure type, in the orthorhombic space groupPnma(No. 62), with the unit cell parametersa=16.098(7) Å,b=4.210(2) Å,c=14.060(4) Å,Z=4. The structure has been refined to an agreement index ofR(F)=0.049 andRω(F)=0.050 for 50 variables and 1322 observations [I>3σ(I)]. The three nonequivalent uranium atoms are coordinated to eight tellurium atoms in bicapped trigonal prismatic arrangements. These prisms are stacked along thebaxis 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 ≈120 K with a significant spin reorientation around 45 K. In the paramagnetic region U3Te5follows a modified Curie–Weiss law with an effective magnetic moment of 2.69μB/U atom andχ0=3.0316×10−3emu/mol.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Région Bretagne</li></region><settlement><li>Rennes</li></settlement><orgName><li>Université de Rennes 1</li></orgName></list><tree><country name="France"><region name="Région Bretagne"><name sortKey="Tougait, O" sort="Tougait, O" uniqKey="Tougait O" first="O." last="Tougait">O. Tougait</name></region><name sortKey="Noel, H" sort="Noel, H" uniqKey="Noel H" first="H." last="Noël">H. Noël</name><name sortKey="Potel, M" sort="Potel, M" uniqKey="Potel M" first="M." last="Potel">M. Potel</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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