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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2004
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46434613 |
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| _version_ | 1866814284476973056 |
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| author | H.P.S. Corrêa |
| author_facet | H.P.S. Corrêa |
| contents | Refinement of monoclinic ReO2 structure from XRD by rietveld method H.P.S. Corrêa I.P. Cavalcante L.G. Martinez C.G.P. Orlando M.T.D. Orlando Física, Astronomía y Matemáticas ReO2 presents two crystalline variants, with monoclinic and orthorhombic structures. The former is metastableand irreversibly transforms to an orthorhombic structure above 460oC. The structure of the latter wasdetermined from studies on monocrystalline samples, whereas for the monoclinic variant there are no singlecrystals available so far. It was found only one monoclinic variant and the structure associated with this variantis based on studies on polycrystals. We analyzed a monoclinic oxide powder sample by X-ray diffraction andrefined its pattern by means of the Rietveld Method. We obtained that the monoclinic variant belongs to spacegroup P21=c, with lattice parameters a = 5:615(3), b = 4:782(2), c = 5:574(2) ° A, ¯ = 120:13(1)o. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434613 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3B Vol.34 |
| format | Artículo científico |
| id | redalyc_46434613 |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Refinement of monoclinic ReO2 structure from XRD by rietveld method H.P.S. Corrêa Física, Astronomía y Matemáticas Refinement of monoclinic ReO2 structure from XRD by rietveld method H.P.S. Corrêa I.P. Cavalcante L.G. Martinez C.G.P. Orlando M.T.D. Orlando Física, Astronomía y Matemáticas ReO2 presents two crystalline variants, with monoclinic and orthorhombic structures. The former is metastableand irreversibly transforms to an orthorhombic structure above 460oC. The structure of the latter wasdetermined from studies on monocrystalline samples, whereas for the monoclinic variant there are no singlecrystals available so far. It was found only one monoclinic variant and the structure associated with this variantis based on studies on polycrystals. We analyzed a monoclinic oxide powder sample by X-ray diffraction andrefined its pattern by means of the Rietveld Method. We obtained that the monoclinic variant belongs to spacegroup P21=c, with lattice parameters a = 5:615(3), b = 4:782(2), c = 5:574(2) ° A, ¯ = 120:13(1)o. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434613 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3B Vol.34 |
| title | Refinement of monoclinic ReO2 structure from XRD by rietveld method |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46434613 |