The Y2S3–La2S3–GeS2 system at 770 K

The isothermal section of the Y2S3–La2S3–GeS2 system at 770 K was investigated. The existence of a solid solution Y4xLa4–4xGe3S12 (x = 0–0.75) was established for the first time. The crystal structure of the Y2La2Ge3S12 compound was studied by X-ray powder method (space group R3c, Pearson symbol hR3...

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Bibliographic Details
Published in:Journal of alloys and compounds 2017-03, Vol.698, p.739-742
Main Authors: Smitiukh, O.V., Marchuk, O.V., Olekseyuk, I.D., Gulay, L.D.
Format: Article
Language:English
Subjects:
Atomic structure
Atoms & subatomic particles
Chalcogenides
Crystal structure
Polyhedra
Rare earth compounds
Rare earth elements
Solid solutions
Tetrahedra
X-ray powder diffraction
Yttrium compounds
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Summary:The isothermal section of the Y2S3–La2S3–GeS2 system at 770 K was investigated. The existence of a solid solution Y4xLa4–4xGe3S12 (x = 0–0.75) was established for the first time. The crystal structure of the Y2La2Ge3S12 compound was studied by X-ray powder method (space group R3c, Pearson symbol hR38, a = 1.92587(9) nm, c = 0.79121(5) nm, RI = 0.0812). Rare-earth atoms M (Y, La) form two types of coordination polyhedra [M1S26S33] and [M2S12S21S32S42] in the crystal structure of Y2La2Ge3S12, and Ge atoms center [GeS11S21S31S41] tetrahedra. •Isothermal section of the Y2S3–La2S3–GeS2 system was investigated.•The existence of a solid solution Y4xLa4–4xGe3S12 was established.•The crystal structure of the Y2La2Ge3S12 compound was determined.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2016.12.283