The new high-pressure hexagonal Laves phase of the YbZn2 compound

Salamatin, D. A.; Klementiev, Konstantin; Krasnorussky, V. N.; Magnitskaya, M. V.; Chtchelkachev, N M; Sidorov, V. A.; Semeno, A.V.; Bokov, A. V.; Kozin, M. G.; Николаев, А. В.; Salamatin, A. V.; Velichkov, A.; Mikhin, M. V.; Budzyński, M.; Tsvyashchenko, A. V.

doi:10.1016/j.jallcom.2023.169275

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“…Multiple high-pressure studies were conducted on various compounds holding RE and transition metal elements. This includes the HPHT synthesis of YbZn 2 ( Salamatin et al, 2023 ) and REFe 2 (RE = Pr, Nd, Yb) ( Cannon et al, 1972 ), the pressure-induced structural transitions in R 1-x Ni 2 (R = Y, Sm, Gd, Tb) ( Gratz et al, 1996 ), and the pressure-induced disordering of vacancies in RNi 2 (R = Y, Sm, Gd, Tb) ( Lindbaum et al, 2002 ). While useful, detailed studies on the HPHT synthesis of RE rhenium alloys have been scarce; therefore, it is essential to determine how the system behaves and develops at elevated conditions.…”

Section: Introductionmentioning

confidence: 99%

High-pressure high-temperature synthesis of NdRe2

Hussein,

Kazemiasl,

Hussaini

et al. 2024

Front. Chem.

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In this study, we report the synthesis of a new cubic neodymium-rhenium metallic alloy NdRe2 through the utilization of high pressure and laser heating in a diamond anvil cell. NdRe2 crystallizes in the Fd3¯m space group with a lattice parameter equal to 7.486 (2) Å and Z = 8 at 24 (1) GPa and 2,200 (100) K. It was studied using high-pressure single-crystal X-ray diffraction. The compound crystallizes in the cubic MgCu2 structure type. Its successful synthesis further proves that high-pressure high-temperature conditions can be used to obtain alloys holding a Laves phase structure. Ab initio calculations were done to predict the mechanical properties of the material. We also discuss the usage of extreme conditions to synthesize and study materials present in the nuclear waste.

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