Superstructure formation in the solid solution Sc3Pt3−xIn3 (x = 0–0.93)
Author:
Gulay Nataliya L.1, Hoffmann Rolf-Dieter1, Kösters Jutta1, Kalychak Yaroslav M.2, Seidel Stefan1, Pöttgen Rainer1
Affiliation:
1. Institut für Anorganische und Analytische Chemie , Universität Münster , Corrensstrasse 30, 48149 Münster , Germany 2. Department of Analytical Chemistry , Ivan Franko National University of Lviv , Kyryla i Mefodiya Street 6, 79005 Lviv , Ukraine
Abstract
Abstract
The equiatomic indide ScPtIn (ZrNiAl type, space group P
6
‾
$‾{6}$
2m) shows an extended solid solution Sc3Pt3–xIn3. Several samples of the Sc3Pt3–xIn3 series were synthesized from the elements by arc-melting and subsequent annealing, or directly in a high frequency furnace. The lowest platinum content was observed for Sc3Pt2.072(3)In3. All samples were characterized by powder X-ray diffraction and their lattice parameters and several single crystals were studied on the basis of precise single crystal X-ray diffractometer data. The correct platinum occupancy parameters were refined from the diffraction data. Decreasing platinum content leads to decreasing a and c lattice parameters. Satellite reflections were observed for the Sc3Pt3–xIn3 crystals with x = 0.31–0.83. These satellite reflections could be described with a modulation vector
(
1
3
,
1
3
,
γ
)
$\left(\frac{1}{3},\frac{1}{3},\gamma \right)$
(
γ
=
1
2
$\gamma =\frac{1}{2}$
c* for all crystals) and are compatible with trigonal symmetry. The interplay of platinum filled vs. empty In6 trigonal prisms is discussed for an approximant structure with space group P3m1.
Publisher
Walter de Gruyter GmbH
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science
Reference41 articles.
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