Premium
SrIr 9 In 18 – A Structurally Complex Intermetallic Compound with Sr@Ir 4 In 12 , Ir@In 8 and Ir@In 9 Building Units
Author(s) -
Heying Birgit,
Hoffmann RolfDieter,
Kösters Jutta,
Pöttgen Rainer
Publication year - 2020
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201900174
Subject(s) - crystallography , iridium , trigonal prismatic molecular geometry , intermetallic , trigonal crystal system , crystal structure , materials science , single crystal , indium , coordination number , infrared spectroscopy , chemistry , octahedron , metallurgy , alloy , ion , catalysis , organic chemistry , biochemistry
Single crystals of SrIr 9 In 18 were obtained by induction melting of the elements in a glassy carbon crucible followed by annealing at 1070 K. SrIr 9 In 18 was structurally characterized by X‐ray powder and single crystal diffraction: P 4 m 2, a = 811.21(5), c = 854.49(5) pm, wR 2 = 0.0511, 1223 F 2 values, and 46 variables. The structure is of a new type. The basic building units are Ir@In 8 (distorted square‐prismatic, square anti ‐prismatic and bicapped trigonal prismatic coordination) and Ir@In 9 (distorted trigonal prismatic coordination) polyhedra, which condense to a three‐dimensional network, which leaves large cavities for the strontium cations, which are coordinated to four iridium and twelve indium atoms. The [Ir 9 In 18 ] 2– polyanionic network is stabilized through Ir–In (267–290 pm) and In–In (302–354 pm) bonding.