15-18 March 2021
DESY
Europe/Berlin timezone

The telluridogallates REGaTe2 (RE = La – Nd)

15 Mar 2021, 15:05
20m
DESY

DESY

Oral contribution Inorganic crystal structures Inorganic crystal structures

Speaker

Tobias Lindemann (Institute of Mineralogy, Crystallography and Materials Science)

Description

Starting from the elements, the new compounds with the composition REGaTe2 (RE = La - Nd) could be obtained, which crystallize in the non-centrosymmetric space group Pmc21. As a possible unique feature, the presence of monovalent Ga atoms can be found for these compounds, resulting in a description of these compounds according to RE(III)Ga(I)Te(-II)2. For this an investigation of the bond valence sums was carried out, which suggests the above distribution of oxidation states. Due to the relatively short atomic distances between the Ga and Te atoms, this compound can be understood as consisting of chain-like built-up polyanions [Ga(2-)Te(0)Te(1-)]3-, taking into account the Zintl concept.

Primary authors

Tobias Lindemann (Institute of Mineralogy, Crystallography and Materials Science) Oliver Oeckler (Leipzig University)

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