| Autor: |
D. Colaïtis, C. Chateau, J. Loriers, G. Bocquillon |
| Rok vydání: |
1977 |
| Předmět: |
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| Zdroj: |
Materials Research Bulletin. 12:403-413 |
| ISSN: |
0025-5408 |
| DOI: |
10.1016/0025-5408(77)90058-7 |
| Popis: |
The new X form of rare earth disilicates Ln/sub 2/Si/sub 2/O/sub 7/ (Ln = Lu,Yb,Tm) is described by means of X-ray powder data. The X-ray indexation is made using single microcrystal electronic diffraction. The investigation of structural relation between Ln/sub 2/Si/sub 2/O/sub 7/ and M/sub 2/A/sub 2/O/sub 7/ compounds as also the X-ray powder data of X-Ln/sub 2/Si/sub 2/O/sub 7/ show that this X form is isostructural with tetragonal Er/sub 2/Ge/sub 2/O/sub 7/. The rare earth coordination polyhedra and the (Si/sub 2/O/sub 7/)/sup 6 -/ configuration are compared with those actually known in neighbouring phases and discussed in terms of pressure effect. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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