In:
Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 63, No. 2 ( 2008-2-1), p. 193-198
Kurzfassung:
The high-temperature modification of LuAgSn was obtained by arc-melting an equiatomic mixture of the elements followed by quenching the melt on a water-cooled copper crucible. HT-LuAgSn crystallizes with the NdPtSb-type structure, space group P6 3 mc: a = 463.5(1), c = 723.2(1) pm, wR2 = 0.0270, 151 F 2 , and 11 variables. The silver and tin atoms build up two-dimensional, puckered [Ag 3 Sn 3 ] networks (276 pm Ag-Sn) that are charge-balanced and separated by the lutetium atoms. The Ag-Sn distances between the [Ag 3 Sn 3 ] layers of 294 pm are much longer. Single crystals of isotypic DyAgSn (a = 468.3(1), c = 734.4(1) pm, wR 2 = 0.0343, 411 F 2 , and 11 variables) and HoAgSn (a = 467.2(1), c = 731.7(2) pm, wR 2 = 0.0318, 330 F 2 , and 11 variables) were obtained from arc-melted samples. Under high-pressure (up to 12.2 GPa) and high-temperature (up to 1470 K) conditions, no transitions to a ZrNiAl-related phase have been observed for DyAgSn, HoAgSn, and YbAgSn. HT-TmAgSn shows Curie-Weiss paramagnetism with μ eff = 7.53(1) μ B /Tm atom and θ P = −15.0(5) K. No magnetic ordering was evident down to 3 K. HT-LuAgSn is a Pauli paramagnet. Room-temperature 119 Sn Mössbauer spectra of HT-TmAgSn and HT-LuAgSn show singlet resonances with isomer shifts of 1.78(1) and 1.72(1) mm/s, respectively
Materialart:
Online-Ressource
ISSN:
1865-7117
,
0932-0776
DOI:
10.1515/znb-2008-0213
Sprache:
Englisch
Verlag:
Walter de Gruyter GmbH
Publikationsdatum:
2008
ZDB Id:
2078109-X
ZDB Id:
124635-5
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