Crystal structure and physical properties of a novel ternary compound La15MoxGe9

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

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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.

Original languageEnglish (US)
Pages (from-to)612-616
Number of pages5
JournalChemical Physics Letters
StatePublished - Sep 2019

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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