SrPt3In2 – an orthorhombically distorted coloring variant of SrIn5. Issue 30 (10th July 2019)

• Record Type: Journal Article
• Authors: Muts, Ihor R.; Hlukhyy, Viktor; Galadzhun, Yaroslav V.; Solokha, Pavlo; Seidel, Stefan; Hoffmann, Rolf-Dieter; Pöttgen, Rainer; Zaremba, Vasyl' I.
• Is Part Of: Dalton transactions. Volume 48:Issue 30(2019)
• Page Start: 11411
• Page End: 11420
• Publication Date: 2019-07-10
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9dt01808e
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The new intermetallic phase SrPt3 In2 was synthesized by induction-melting of the elements in a sealed tantalum ampoule followed by long-term annealing for crystal growth. Abstract : The new intermetallic phase SrPt3 In2 was synthesized by induction-melting of the elements in a sealed tantalum ampoule followed by long-term annealing for crystal growth. The SrPt3 In2 structure was refined from single crystal X-ray diffraction data: Imma, a = 1674.7(6), b = 921.2(4), c = 971.2(4) pm, w R 2 = 0.0551, 1192 F 2 values and 55 variables. Electronic structure calculations indicate strong covalent Pt–In bonding and a substantial charge transfer from the strontium atoms to the three-dimensional [Pt3 In2 ] δ − polyanionic network. The strontium atoms fill larger cavities within the network and the bonding of strontium to the polyanion is of the electrostatic type. The Bader charge calculations classify SrPt3 In2 as a ternary platinide. The close relationship between the SrPt3 In2 structure and the aristotype CaCu5 is discussed on the basis of a group–subgroup scheme in the Bärnighausen formalism along with other CaCu5 coloring variants and superstructures.