Abstract
Crystals of disamarium rhenium (IV) pentoxide, Sm2ReO5, were obtained by subsolidus reaction of samariumsesquioxide and rheniumdioxide (ratio 1:1) in sealed Pt 10Rh tubes at 1673 K. The structure was determined by single-crystal X-ray diffraction. Sm2ReO5crystallizes in the tetragonal system with unit cell dimensionsa=8.646(3) Å andc=5.747(2) Å and space group P4/n(no. 85) withZ=4. The structure consists of isolated Re2O8groups and chains of edge-sharing Sm4O tetrahedra. The Re2O8groups and the (Sm4O) chains are inter-connected by common oxygen atoms to form a three-dimensional network. Each Re2O8group is composed of a pair of rhenium each surrounded by four oxygens with a short Re–Re distance of 2.251(1) Å indicating a metal–metal bond. Rhenium has the formal oxidation state of +4. The observed magnetizations in the temperature range 1.8<T<100 K exhibits antiferromagnetic ordering below 2.4(1) K and obey a Curie–Weiss law modified by a temperature-independent Van Vleck paramagnetism of samarium (3+) forT>4.5 K.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
