La2U2Se9: an ordered lanthanide/actinide chalcogenide with a novel structure type

Inorganic Chemistry
Daniel E BugarisJames A Ibers

Abstract

The compound La(2)U(2)Se(9) was obtained in high yield from the stoichiometric reaction of the elements in an Sb(2)Se(3) flux at 1123 K. The compound, which crystallizes in a new structure type in space group Pmma of the orthorhombic system, has a three-dimensional structure with alternating U/Se and La/Se layers attached via three independent, infinite polyselenide chains. The U atom has a monocapped square antiprismatic coordination of Se atoms, whereas one La atom is bicapped square prismatic and the other La atom is trigonal prismatic. La(2)U(2)Se(9) displays an antiferromagnetic transition at T(N) = 5 K; above 50 K, the paramagnetic behavior can be fit to the Curie-Weiss law, yielding a mu(eff) of 3.10(1) mu(B)/U. The low-temperature specific heat of La(2)U(2)Se(9) exhibits no anomalous behavior near the Neel temperature that might indicate long-range magnetic ordering or a phase transition. X-ray absorption near-edge structure (XANES) spectra have confirmed the assignment of formal oxidation states of +III for lanthanum and +IV for uranium in La(2)U(2)Se(9).

References

Oct 1, 1985·Physical Review. B, Condensed Matter·H RudigierO Vogt
Oct 15, 1985·Physical Review. B, Condensed Matter·B T TholeJ Esteva
Jan 1, 1986·Physical Review. B, Condensed Matter·J E Gordon, R Troc
Jul 16, 2005·Analytical and Bioanalytical Chemistry·Hans J NilssonDavid K Shuh
Oct 5, 2007·Inorganic Chemistry·Geng Bang JinThomas E Albrecht-Schmitt
Dec 25, 2007·Acta Crystallographica. Section A, Foundations of Crystallography·George M Sheldrick
Sep 1, 2009·Inorganic Chemistry·Geng Bang JinJames A Ibers

❮ Previous
Next ❯

Citations

Dec 24, 2013·Inorganic Chemistry·Ming-Yan Chung, Chi-Shen Lee
Feb 18, 2015·Journal of the American Chemical Society·Matthias W LöbleRalph A Zehnder
Aug 30, 2014·Advanced Materials·Wei-Qun ShiZhi-Fang Chai
Jul 22, 2014·Chemistry : a European Journal·Manuel Sturzbecher-HoehneRebecca J Abergel
Apr 14, 2010·Dalton Transactions : an International Journal of Inorganic Chemistry·Daniel E Bugaris, James A Ibers
Jun 11, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Thaige P GompaHenry S La Pierre
Sep 16, 2015·Environmental Science & Technology·Sirine C FakraJillian F Banfield

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.