| Journal: | Revista mexicana de física |
| Database: | PERIÓDICA |
| System number: | 000460811 |
| ISSN: | 0035-001X |
| Authors: | Delgado, Gerzon E1 Quintero, Miguel1 |
| Institutions: | 1Universidad de Los Andes, Facultad de Ciencias, Mérida. Venezuela |
| Year: | 2022 |
| Season: | Mar-Abr |
| Volumen: | 68 |
| Number: | 2 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, teórico |
| English abstract | Sample of the quaternary phase CuAlGeSe4, a part of I-III-IV-⃞-VI4 semiconductor system, was synthesized by the melt and annealing technique and analyzed using X-ray powder diffraction data. The indexing and refinement of the pattern indicate that this compound crystallizes in the tetragonal system, space group I 4 - ( N 82 ) with unit cell parameters: α = 5.5646(3) Å, c = 10.682(2) Å, V = 330.77(5) Å3. The space group was established from a cationic and anionic distribution analysis in the tetragonal space groups: I 4 - 2 d (N◦ 122), I 4 - 2 2 m (N◦ 121), and I 4 - 2 (N◦ 82), for an ordered structure in this material. The Rietveld refinement, performed with the starting model: Cu 2c, Al 2b, Ge 2d, ⃞2a, and Se 8g, converged to R exp = 7.2%, R P = 7.4%, R wp = 9.6%, and χ 2 = 1.7 |
| Disciplines: | Física y astronomía |
| Keyword: | Física de materia condensada, Calcogenuro, Difracción de rayos X en polvo, Estructura cristalina |
| Keyword: | Condensed matter physics, Chalcogenide, Powder X-ray diffraction, Crystal structure |
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