Tolerance Factor for Huntite-Family Compounds
| Autor: | Maxim S. Molokeev, S. O. Kuznetsov |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Phase transition Materials science Huntite Ionic radius Solid-state physics Thermodynamics engineering.material Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Moment (mathematics) Phase (matter) 0103 physical sciences engineering 010306 general physics |
| Zdroj: | Physics of the Solid State. 62:2058-2062 |
| ISSN: | 1090-6460 1063-7834 |
| DOI: | 10.1134/s1063783420110190 |
| Popis: | 85 RM3(BO3)4 (R is the rare-earth element (Y, La–Lu) and M = Al, Sc, Cr, Fe, or Ga) compounds with the huntite structure have been analyzed. The analysis of the structures has made it possible to determine critical atomic displacements during the phase transition R32 ↔ P3121 and establish how these critical displacements can be controlled by varying the ionic radii. A tolerance factor has been derived and its threshold value below which the structure is stable in the R32 phase and above it, in the distorted P3121 phase, has been found. The formula has been tested on more than 30 huntite-family compounds and good agreement has been obtained. Therefore, it can be used with confidence to predict new compounds. At the moment, the tolerance factor has allowed us to establish previously unknown regularities in huntites. |
| Databáze: | OpenAIRE |
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