High-pressure synthesis of SmGe3
Author:
Hübner Julia-Maria1ORCID, Carrillo-Cabrera Wilder1, Cardoso-Gil Raul1, Koželj Primož1, Burkhardt Ulrich1, Etter Martin2, Akselrud Lev1, Grin Yuri1, Schwarz Ulrich1ORCID
Affiliation:
1. Max-Planck-Institut für Chemische Physik fester Stoffe , Nöthnitzer Straße 40 , 01187 Dresden , Germany 2. Deutsches Elektronen Synchrotron , Notke Straße 85 , 22607 Hamburg , Germany
Abstract
Abstract
The new samarium germanide SmGe3 is obtained by high-pressure high-temperature synthesis of pre-reacted mixtures of samarium and germanium at a pressure of 9.5 GPa and temperatures between 1073 and 1273 K. SmGe3 decomposes at 470(5) K into SmGe2, α-Sm3Ge5 and a hitherto unknown phase. SmGe3 exhibits a superstructure of the cubic Cu3Au-type. Transmission electron microscopy measurements of crystalline particles and prepared lamellae indicate a high density of defects on the nanoscale. Selected area electron diffraction and elaborate X-ray powder diffraction measurements consistently indicate a 2a
0 × 2a
0 × 2a
0 superstructure adopting space group
F
m
3
¯
m
$Fm\overline{3}m$
with a = 8.6719(2) Å.
Funder
International Max Planck Research School for Chemistry and Physics of Quantum Materials
Publisher
Walter de Gruyter GmbH
Subject
Inorganic Chemistry,Condensed Matter Physics,General Materials Science
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