Crystal structure of R^sub 3^Si^sub 1.75^Se^sub 7^ (R – 1.5 Y + 1.5 La)

The existence of the new quaternary compound R3Si1.75Se7 (R – 1.5 Y + 1.5 La) was established. Its crystal structure was studied by X-ray powder method (space group P63, Pearson symbol hР24–1.44, a = 1.05968(2) nm, c = 0.59995(2) nm, RI = 0.0414). Rare-earth atoms in the structure of this compound a...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2018-10, Vol.765, p.731
Main Authors: Smitiukh, OV, Marchuk, OV, Fedorchuk, AO, Grebenyuk, AG
Format: Article
Language:English
Subjects:
Atomic structure
Atoms & subatomic particles
Chemical bonds
Crystal structure
Diffraction
Organic chemistry
Prisms
Quantum chemistry
Rare earth elements
Trace elements
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The existence of the new quaternary compound R3Si1.75Se7 (R – 1.5 Y + 1.5 La) was established. Its crystal structure was studied by X-ray powder method (space group P63, Pearson symbol hР24–1.44, a = 1.05968(2) nm, c = 0.59995(2) nm, RI = 0.0414). Rare-earth atoms in the structure of this compound are localized in trigonal prisms with two additional atoms, SiIV atoms center tetrahedra, and SiII atoms lie in octahedra. Quantum chemical simulation of separate fragments of the structure of this mixed selenosilicate (II, IV) was performed.
ISSN:0925-8388
1873-4669