The Crystal Structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 Compounds
The crystal structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 compounds was determined by X-ray powder diffraction method. The samples were prepared by solid-solid reactions of the elements at 1370 K. The compounds crystallize in the La3CuSiS7 structure type, space group P63, with the lattice and com...
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| Format: | Article |
| Language: | English |
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Vasyl Stefanyk Precarpathian National University
2022-03-01
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| Series: | Фізика і хімія твердого тіла |
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| Online Access: | https://journals.pnu.edu.ua/index.php/pcss/article/view/5148 |
| _version_ | 1811297562869628928 |
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| author | N.M. Blashko O.V. Smitiukh O.V. Marchuk |
| author_facet | N.M. Blashko O.V. Smitiukh O.V. Marchuk |
| author_sort | N.M. Blashko |
| collection | DOAJ |
| description | The crystal structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 compounds was determined by X-ray powder diffraction method. The samples were prepared by solid-solid reactions of the elements at 1370 K. The compounds crystallize in the La3CuSiS7 structure type, space group P63, with the lattice and computation parameters a = 1.01902(3) nm, c = 0.60661(2) nm, RI = 0.0673, RP = 0.1546 (for La3Pb0.1Ga1.6S7) and a = 1.00034(3) nm, c = 0.60587(3) nm, RI = 0.0847, RP = 0.1623 (for Pr3Pb0.1Ga1.6S7). The crystalline structure is described with hexagonal system, in which La(Pr) atoms center trigonal prisms with one additional atom. These prisms are formed by S atoms. The atoms of the statistical mixture M1(0.600 Ga + 0.090 Pb) and M2 (0.59(1) Ga + 0.095(7) Pb) are located practically in the centers of the octahedra of S atoms. Ga atoms are located in tetrahedra of S atoms. Asymmetric structure of the studied compounds points out their non-linear properties. Adding Pb atoms to the structure of La3Ga1.67S(Se)7 compounds increases the probability of formation of the ionic component of the inter-atomic bond, and this in turn improves thermoelectric properties. |
| first_indexed | 2024-04-13T06:06:16Z |
| format | Article |
| id | doaj.art-a310046370094070a02f35e37def9b16 |
| institution | Directory Open Access Journal |
| issn | 1729-4428 2309-8589 |
| language | English |
| last_indexed | 2024-04-13T06:06:16Z |
| publishDate | 2022-03-01 |
| publisher | Vasyl Stefanyk Precarpathian National University |
| record_format | Article |
| series | Фізика і хімія твердого тіла |
| spelling | doaj.art-a310046370094070a02f35e37def9b162022-12-22T02:59:15ZengVasyl Stefanyk Precarpathian National UniversityФізика і хімія твердого тіла1729-44282309-85892022-03-012319610010.15330/pcss.23.1.96-1005148The Crystal Structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 CompoundsN.M. Blashko0O.V. Smitiukh1O.V. Marchuk2Lesya Ukrainka Volyn National UniversityLesya Ukrainka Volyn National UniversityLesya Ukrainka Volyn National UniversityThe crystal structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 compounds was determined by X-ray powder diffraction method. The samples were prepared by solid-solid reactions of the elements at 1370 K. The compounds crystallize in the La3CuSiS7 structure type, space group P63, with the lattice and computation parameters a = 1.01902(3) nm, c = 0.60661(2) nm, RI = 0.0673, RP = 0.1546 (for La3Pb0.1Ga1.6S7) and a = 1.00034(3) nm, c = 0.60587(3) nm, RI = 0.0847, RP = 0.1623 (for Pr3Pb0.1Ga1.6S7). The crystalline structure is described with hexagonal system, in which La(Pr) atoms center trigonal prisms with one additional atom. These prisms are formed by S atoms. The atoms of the statistical mixture M1(0.600 Ga + 0.090 Pb) and M2 (0.59(1) Ga + 0.095(7) Pb) are located practically in the centers of the octahedra of S atoms. Ga atoms are located in tetrahedra of S atoms. Asymmetric structure of the studied compounds points out their non-linear properties. Adding Pb atoms to the structure of La3Ga1.67S(Se)7 compounds increases the probability of formation of the ionic component of the inter-atomic bond, and this in turn improves thermoelectric properties.https://journals.pnu.edu.ua/index.php/pcss/article/view/5148crystal structurex-ray methodsrare-earth metal chalcogenides |
| spellingShingle | N.M. Blashko O.V. Smitiukh O.V. Marchuk The Crystal Structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 Compounds Фізика і хімія твердого тіла crystal structure x-ray methods rare-earth metal chalcogenides |
| title | The Crystal Structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 Compounds |
| title_full | The Crystal Structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 Compounds |
| title_fullStr | The Crystal Structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 Compounds |
| title_full_unstemmed | The Crystal Structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 Compounds |
| title_short | The Crystal Structure of La3Pb0.1Ga1.6S7 and Pr3Pb0.1Ga1.6S7 Compounds |
| title_sort | crystal structure of la3pb0 1ga1 6s7 and pr3pb0 1ga1 6s7 compounds |
| topic | crystal structure x-ray methods rare-earth metal chalcogenides |
| url | https://journals.pnu.edu.ua/index.php/pcss/article/view/5148 |
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