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EuAuGe Type Indides R AgIn ( R = Ca, Sr, La, Eu)
Author(s) -
Stein Sebastian,
Schmolke Kai Heinz,
Block Theresa,
Heletta Lukas,
Hoffmann RolfDieter,
Pöttgen Rainer
Publication year - 2017
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.201700152
Subject(s) - europium , crystallography , intermetallic , crystal structure , mössbauer spectroscopy , magnetic moment , structure type , chemistry , atom (system on chip) , magnetic susceptibility , indium , materials science , metallurgy , ion , condensed matter physics , physics , organic chemistry , alloy , computer science , embedded system
The equiatomic intermetallic phases CaAgIn [ a = 482.75(7), b = 750.0(1), c = 835.5(1) pm], SrAgIn [ a = 495.86(5), b = 794.71(9), c = 851.89(9) pm], LaAgIn [ a = 489.99(5), b = 767.93(9), c = 837.53(9) pm], and EuAgIn [ a = 493.02(7), b = 781.6(1), c = 844.2(1) pm] were synthesized from the elements in sealed niobum containers. They crystallize with the EuAuGe type structure, space group Imm 2. The four structures were refined from single‐crystal X‐ray data. The silver and indium atoms build up orthorhombically distorted, puckered Ag 3 In 3 hexagons, which are stacked in AA′ sequence, leading to direct Ag–Ag and In–In interlayer bonding (e.g. 303 and 304 pm in CaAgIn). Temperature dependent magnetic susceptibility measurements show a magnetic moment of 7.40(1) μ B per europium atom. EuAgIn orders antiferromagnetically at 5.7(5) K. The divalent nature of europium is also evident from 151 Eu Mössbauer spectra: δ = –10.50(1) mm · s –1 at 78 K.