Crystal structure and physical properties of a novel ternary compound La15MoxGe9

Joanna Blawat; Weiwei Xie; Robert J. Cava; Tomasz Klimczuk

doi:10.1016/j.cplett.2019.06.065

Crystal structure and physical properties of a novel ternary compound La15MoxGe9

Abstract

We present the synthesis, structural characterization and physical properties measurements of a new compound, La15MoxGe9 in Mn5Si3-type derived structure with interstitial Mo. The sample was synthesized by arc-melting method. La15MoxGe9 crystallizes in non-centrosymmetric hexagonal structure P63mc (#186) with lattice parameters a = b = 15.495(5) Å and c = 6.917(2) Å. The refinement on single X-ray diffraction data show that interstitial atom Mo occupies two different Wyckoff positions (2a, 2b) with 0.19(2) Mo/per f.u. The specific heat properties were well studied. The obtained Sommerfeld coefficient and Debye temperature are: γ = 89.2(9) mJ/(mol K2) and ΘD = 190(5) K, respectively. La15MoxGe9 is the first compound in the ternary system La-Mo-Ge

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Keywords

GERMANIUM COMPOUNDS, PHYSICAL PROPERTIES, SPECIFIC HEAT

Details

Category:: Articles
Type:: artykuły w czasopismach
Published in:: CHEMICAL PHYSICS LETTERS no. 730, pages 612 - 616,
ISSN: 0009-2614
Language:: English
Publication year:: 2019
Bibliographic description:: Blawat J., Xie W., Cava R., Klimczuk T.: Crystal structure and physical properties of a novel ternary compound La15MoxGe9// CHEMICAL PHYSICS LETTERS -Vol. 730, (2019), s.612-616
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.cplett.2019.06.065
Verified by:: Gdańsk University of Technology