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Decoupage du ternaire ytterbium-indium-soufre description cristallographique des phases presentes
- Source :
- Materials Research Bulletin. 28:213-219
- Publication Year :
- 1993
- Publisher :
- Elsevier BV, 1993.
-
Abstract
- In the ternary Yb-In-S system two phases were identified and their structure determinated on single crystal by X-ray diffraction. Yb[sub 4/3]In[sub 4/3]S[sub 4] belongs to a solid solution, it has a cubic structure intermediate between spinel and NaCl type. All metal sites are incompletely occupied. Yb[sub 18]In[sub 7.33]S[sub 36] is hexagonal. Yb[sup III] atoms have two types of environment with sevenfold prismatic and sixfold octahedral coordination. However, the octahedral sites are occupied also by In[sup III] atoms. Large channels around the threefold and sixfold axes are occupied by In[sup 1] or are empty. The two structures are analyzed. They have the particularity to have octahedral sites occupied by Yb[sup III] and In[sup III] statistically disordered. The most similar radii of Yb[sup III] and In[sup III] atoms are likely the reason of the existence of the hexagonal phase not found for other rare earth atoms and also of the presence of a large solid solution, domain for the first phase.
- Subjects :
- chemistry.chemical_classification
Chemistry
Crystal chemistry
Mechanical Engineering
Inorganic chemistry
Hexagonal phase
Crystal structure
Condensed Matter Physics
Crystallography
Octahedron
Mechanics of Materials
X-ray crystallography
General Materials Science
Single crystal
Inorganic compound
Solid solution
Subjects
Details
- ISSN :
- 00255408
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Materials Research Bulletin
- Accession number :
- edsair.doi...........779da5c51e89751890e248504dc4c7b6
- Full Text :
- https://doi.org/10.1016/0025-5408(93)90154-6