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High-Pressure Synthesis of an Alkali Metal–Transition Metal Laves Phase: KAg2

✍ Scribed by M. Hasegawa; T. Atou; J.V. Badding

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
228 KB
Volume
130
Category
Article
ISSN
0022-4596

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✦ Synopsis

A new C14 Laves phase was synthesized by direct reaction of potassium and silver at high pressure in a diamond anvil cell. The structure was refined by Rietveld analysis on powder diffraction data in the space group P6 3 /mmc to an R F value of 0.034. The lattice parameters are a ‫؍‬ 5.589(5) and c ‫؍‬ 9.476(1). Formation of this phase under pressure is in agreement with predictions based on Miedema's rules. A novel double-sided laser heating system was developed for the synthesis of KAg 2 .

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## Abstract The title compound is synthesized from mixtures of LiH and Pt in the presence of BH~3~NH~3~ (multi‐anvil device, <8 GPa, 450—500 °C, 60 min) and characterized by powder XRD and IR spectroscopy.