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Ca 2 Pd 2 In and Ca 2 Pt 2 In with Monoclinic HT‐Pr 2 Co 2 Al Type Structure
Author(s) -
Muts Ihor R.,
Zaremba Vasyl I.,
Rodewald Ute Ch.,
Hermes Wilfried,
Pöttgen Rainer
Publication year - 2007
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.200700304
Subject(s) - tantalum , crystallography , palladium , monoclinic crystal system , transition metal , metal , chemistry , atom (system on chip) , indium , crystal structure , trigonal crystal system , intermetallic , x ray crystallography , materials science , diffraction , catalysis , physics , biochemistry , organic chemistry , alloy , computer science , embedded system , optics
The metal‐rich indides Ca 2 Pd 2 In and Ca 2 Pt 2 In were synthesised from the elements in sealed tantalum ampoules in an induction furnace. Both samples were investigated by X‐ray powder and single crystal diffraction: HT‐Pr 2 Co 2 Al type, C 2/ c , a = 1017.6(5), b = 574.1(3), c = 812.7(3) pm, β = 104.54(2)°, wR2 = 0.0344, 590 F 2 values for Ca 2 Pd 2 In and a = 1004.3(3), b = 568.9(1), c = 813.1(2) pm, β = 104.25(2)°, wR2 = 0.0435, 654 F 2 values for Ca 2 Pt 2 In with 25 variables per refinement. The structure contain Pd 2 (272 pm) and Pt 2 (264 pm) dumb‐bells with a trigonal prismatic coordination for each transition metal atom. These AlB 2 related slabs are condensed via common edges. Together the palladium and indium atoms build up three‐dimensional [Pd 2 In] and [Pt 2 In] polyanionic networks in which the calcium atoms fill larger channels. The bonding of calcium to the network proceeds via shorter Ca–Pd and Ca–Pt contacts. Ca 2 Pd 2 In and Ca 2 Pt 2 In are Pauli paramagnets.