Structural investigation of cooperite (PtS) crystals

The single-crystal structure of cooperite, a natural platinum sulfide PtS, is studied by X-ray diffraction supported by high-resolution scanning transmission electron microscopy and X-ray spectrum microanalysis. It is found that, in addition to the main reflections corresponding to the known tetrago...

Full description

Saved in:
Bibliographic Details
Published in:Crystallography reports 2016-03, Vol.61 (2), p.193-202
Main Authors: Rozhdestvina, V. I., Udovenko, A. A., Rubanov, S. V., Mudrovskaya, N. V.
Format: Article
Language:English
Subjects:
CHEMICAL COMPOSITION
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystallography and Scattering Methods
MONOCRYSTALS
Physics
Physics and Astronomy
PLATINUM SULFIDES
SPACE GROUPS
STOICHIOMETRY
Structure of Inorganic Compounds
TETRAGONAL LATTICES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The single-crystal structure of cooperite, a natural platinum sulfide PtS, is studied by X-ray diffraction supported by high-resolution scanning transmission electron microscopy and X-ray spectrum microanalysis. It is found that, in addition to the main reflections corresponding to the known tetragonal cell ( a = 3.47 and c = 6.11 Å; space group P 4 2 / mmc ), many weak reflections with intensities I ≤ 60 σ ( I ) are clearly observed. These reflections fit the tetragonal cell (space group I 4/ mmm ) with doubled parameters. In structures with small ( P 4 2 / mmc ) and large ( I 4/ mmm ) cells, the S atoms occupy statistically two special positions. It is shown that the chemical composition of the cooperite crystals deviates from the stoichiometric composition: sulfur-deficient specimens predominate.
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774516020176