Eu2Ru3Si5 and Eu2Ir3Ga5 – first europium compounds with U2Mn3Si5-type structure but different europium valence

Autor:	Stefan Seidel, Thomas Harmening, Jutta Kösters, Aylin Koldemir, Wilma Pröbsting, Simon Engelbert, Rainer Pöttgen
Rok vydání:	2023
Předmět:	General Chemistry
Zdroj:	Zeitschrift für Naturforschung B. 78:293-300
ISSN:	1865-7117 0932-0776
Popis:	The silicide Eu2Ru3Si5 was synthesized from the elements in a sealed tantalum tube in a high-frequency furnace, while the gallide Eu2Ir3Ga5 was obtained by arc-melting. Both structures were refined from single-crystal X-ray diffractometer data: P4/mnc, a = 1072.69(8), c = 569.55(5) pm, wR = 0.0453, 617 F 2 values, 31 variables for Eu2Ru3Si5 and a = 1122.18(7), c = 583.17(4) pm, wR = 0.0546, 729 F 2 values, 31 variables for Eu2Ir3Ga4.95(1). The gallide shows small defects on one 8h site. The transition metal atoms in Eu2Ru3Si5 and Eu2Ir3Ga5 have octahedral p element coordination. These Ru@Si6 respectively Ir@Ga6 polyhedra are condensed to three-dimensional [Ru3Si5]6− respectively [Ir3Ga5]4− polyanionic networks. The ground states of Eu(III) in Eu2Ru3Si5 and Eu(II) in Eu2Ir3Ga5 were determined by 151Eu Mössbauer spectroscopy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e2f59184b2648faf079389cb8da800e4 https://doi.org/10.1515/znb-2023-0009 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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