The new nickel tellurite chloride compound Ni15Te12O34Cl10 - synthesis, crystal structure and magnetic properties

Summary, in English

A new nickel tellurite oxohalide, Ni15Te12O34Cl10, has been prepared by chemical vapour transport reactions and the crystal structure was determined by single-crystal X-ray diffraction. The compound crystallizes in the triclinic space group P (1) over bar with the pseudomonoclinic cell parameters a = 10.3248(6) angstrom, b = 10.3249(6) angstrom, c = 11.6460(8) angstrom, alpha = 73.782(6)degrees, beta = 73.782(6)degrees, gamma = 63.51(2)degrees, Z = 1, R-1 = 0.0264. The Ni2+ ions have octahedral [NiO6] and [NiO4Cl2] coordinations, the Te4+ ions have one-sided [TeO3] and [TeO4] coordinations. The crystal structure can be described as consisting of nickel oxide ribbons extending along (001) that are connected by corner sharing [TeO3] and [TeO4] groups to build the open framework structure. The chlorine atoms and the Te-lone pairs are facing voids in the oxide framework. The new compound undergoes two successive antiferromagnetic ordering transitions at similar to 50 K and similar to 10 K. The Curie-Weiss temperature obtained from detailed evaluation of the high-temperature magnetic susceptibilities is positive indicating predominant ferromagnetic superexchange interactions between the Ni magnetic moments.

• Författare: Dong Zhang; Mats Johnsson; Sven Lidin; Reinhard K. Kremer
• Avdelning/ar: Centrum för analys och syntes
• Publiceringsår: 2013
• Språk: Engelska
• Sidor: 1394-1399
• Publikation/Tidskrift/Serie: Dalton Transactions
• Volym: 42
• Issue: 5
• Länkar: http://dx.doi.org/10.1039/c2dt32158k
• Dokumenttyp: Artikel i tidskrift
• Förlag: Royal Society of Chemistry
• Ämne: Chemical Sciences
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 1477-9234