MAl4Ir2 (M = Ca, Sr, Eu): superstructures of the KAu4In2 type
نویسندگان
چکیده
Abstract Three new iridium aluminum intermetallics CaAl 4 Ir 2 , SrAl and EuAl were synthesized from the elements using silica or tantalum ampoules. They crystallize in tetragonal crystal system with space group P 4/ ncc lattice parameters of a = 782.20(1) c 779.14(2) pm for 797.62(1) 772.75(2) finally 791.78(5) 773.31(5) . All compounds isostructurally adopt structure type that can be derived KAu In structure. To compare structures crystallographic point view, group–subgroup relation between as well Sn have been established Bärnighausen formalism. Finally, quantum-chemical calculations conducted, showing all three title compounds, polyanionic [Al ] δ – network exists significant (polar) bonding interactions, while respective Ca + Sr Eu cations are located octagonal channels. Graphical abstract
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ژورنال
عنوان ژورنال: Monatshefte Fur Chemie
سال: 2022
ISSN: ['1434-4475', '0026-9247']
DOI: https://doi.org/10.1007/s00706-022-03005-8