Thumbnail
Access Restriction
Open

Author Ward, Matthew D. ♦ Chan, Ian Y. ♦ Malliakas, Christos D. ♦ Lee, Minseong ♦ Choi, Eun Sang ♦ Ibers, James A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ ATOMS ♦ CHROMIUM IONS ♦ CRYSTALS ♦ CURIE-WEISS LAW ♦ MAGNETIC FIELDS ♦ MAGNETISM ♦ MONOCLINIC LATTICES ♦ ORTHORHOMBIC LATTICES ♦ SYNTHESIS ♦ TEMPERATURE DEPENDENCE ♦ URANIUM IONS
Abstract The compound Cr{sub 4}US{sub 8} has been synthesized at 1073 K and its crystal structure has been determined at 100 K. The structure is modulated with a two-fold commensurate supercell. The subcell may be indexed in an orthorhombic cell but weak supercell reflections lead to the monoclinic superspace group P2{sub 1}/c(α0γ)0s with two Cr sites, one U site, and four S sites. The structure comprises a three-dimensional framework of CrS{sub 6} octahedra with channels that are partially occupied by U atoms. Each U atom in these channels is coordinated by eight S atoms in a bicapped trigonal-prismatic arrangement. The magnetic behavior of Cr{sub 4}US{sub 8} is complex. At temperatures above ~120 K at all measured fields, there is little difference between field-cooled and zero field-cooled data and χ(T) decreases monotonously with temperature, which is reminiscent of the Curie–Weiss law. At lower temperatures, the temperature dependence of χ(T) is complex and strongly dependent on the magnetic field strength. - Graphical abstract: Structure of Cr{sub 4}US{sub 8} viewed down the a axis. - Highlights: • At 1073 K Cr{sub 4}US{sub 8} was synthesized and at 100 K its crystal structure was determined. • The 3D structure comprises CrS{sub 6} octahedra with channels partially occupied by U. • The magnetic behavior of Cr{sub 4}US{sub 8} is complex.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-01-15
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 233


Open content in new tab

   Open content in new tab