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vol.61 número2REVERSE PHASE HPLC AND DERIVATIVE SPECTROPHOTOMETRIC METHODS FOR SIMULTANEOUS ESTIMATION OF FENBENDAZOLE AND NICLOSAMIDE IN PHARMACEUTICAL DOSAGE FORMA NOVEL ACENTRIC CHAR SULFATE INORGANIC-ORGANIC HYBRID FRAMEWORK: PHOTOLUMINESCENT, NLO AND SEMICONDUCTOR PROPERTIES índice de autoresíndice de assuntospesquisa de artigos
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Journal of the Chilean Chemical Society

versão On-line ISSN 0717-9707

Resumo

MA, FA-XUE et al. FOUR-DIMENSIONAL INCOMMENSURATELY MODULATED STRUCTURE OF THULIUM POLYPHOSPHATE. J. Chil. Chem. Soc. [online]. 2016, vol.61, n.2, pp.3005-3008. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072016000200031.

Single crystal of rare-earth polyphosphate Tm(PO3)3 has been grown under high temperature molten-salt method and structurally characterized by single crystal X-ray diffraction analysis. Using the four-dimensional superspace formalism for aperiodic structures, we performed the crystal structure refinement of Tm(PO3)3 as (3+1)-dimensional incommensurately modulated structure with monoclinic superspace group C2/c(0, 0.358, 0)s0 and α = 14.0620 (12) Å, b = 6.6612 (6) Å, c = 10.0191 (9) Å, β = 127.6043 (9)°, V = 743.51 (11) Å3, Z = 4, Mr = 405.8, Dc = 3.626 g/cm3, F(000) = 744, μ(MoKα) = 12.60 mm'1, R = 0.048 and ωR = 0.050. The structure features infinite chains of corner-sharing PO4 tetrahedra which are affected by positional modulation running along the b-axis. The final structure model was reasonable and did not show any unusual features.

Palavras-chave : Crystal growth; Crystal structure; X-ray diffraction; Polyphosphate; Incommensurately modulated structure.

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