Published November 2008 | Version v1
Journal article Metadata-only

High-pressure modifications of CaZn2, SrZn2, SrAl2, and BaAl2: Implications for Laves phase structural trends

Creators

  • 1. Department of Chemistry, Indian Institute of Technology, Kharagpur 721302 (India)
  • 2. Department of Chemistry and Biochemistry, Arizona State University, P.O. Box 871604 Tempe, AZ 85287-1604 (United States)
  • 3. Structural Chemistry, Stockholm University, 10691 Stockholm (Sweden)

Description

High-pressure forms of intermetallic compounds with the composition CaZn2, SrZn2, SrAl2, and BaAl2 were synthesized from CeCu2-type precursors (CaZn2, SrZn2, SrAl2) and Ba21Al40 by multi-anvil techniques and investigated by X-ray powder diffraction (SrAl2 and BaAl2), X-ray single-crystal diffraction (CaZn2), and electron microscopy (SrZn2). Their structures correspond to that of Laves phases. Whereas the dialuminides crystallize in the cubic MgCu2 (C15) structure, the dizincides adopt the hexagonal MgZn2 (C14) structure. This trend is in agreement with the structural relationship displayed by sp bonded Laves phase systems at ambient conditions. - Graphical abstract: CeCu2-type polar intermetallics can be transformed to Laves phases upon simultaneous application of pressure and temperature. The observed structures are controlled by the valence electron concentration

Availability note (English)

Available from http://dx.doi.org/10.1016/j.jssc.2008.07.036

Additional details

Identifiers

DOI
10.1016/j.jssc.2008.07.036;
PII
S0022-4596(08)00421-0;

Publishing Information

Journal Title
Journal of Solid State Chemistry
Journal Volume
181
Journal Issue
11
Journal Page Range
p. 3016-3023
ISSN
0022-4596
CODEN
JSSCBI

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40082350
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ALUMINIUM ALLOYS; BARIUM ALLOYS; CALCIUM ALLOYS; ELECTRON MICROSCOPY; INTERMETALLIC COMPOUNDS; LAVES PHASES; MONOCRYSTALS; PRECURSOR; STRONTIUM ALLOYS; X-RAY DIFFRACTION; ZINC ALLOYS
Descriptors DEC
ALLOYS; COHERENT SCATTERING; CRYSTALS; DIFFRACTION; MICROSCOPY; SCATTERING

Optional Information

Copyright
Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.