Structural and textural characterization of a novel spatially coherent crystalline nanocomposite obtained from a melt of KBr, RbCl, RbBr, KI, RbI, and KCl salts
Por:
Cordero-Borboa A.E., Mijangos R.R., Flores-Morales L.
Publicada:
1 jul 2008
Resumen:
Large crystal bulks, grown by the Czochralski technique from a melt prepared by mixing equal molar fractions of KBr, RbCl, RbBr, KI, RbI, and KCl salts, are characterized by X-ray diffractometry and atomic force microscopy. The bulk material consists of a highly textured aggregation of crystallites of two different face-centered-cubic-solid solutions with unit-cell sizes of 7.247 +/- 0.001 and 6.536 +/- 0.005 angstrom, in molar fractions of 1/3 and 2/3, respectively. These solutions are discussed to be the binary KI(34.4%):RbI(65.6%) and the quaternary KBr(42.7%):RbCl(33.2%):RbBr(8.1%)KCl(16.0%) mixed phases, respectively. Most of the crystallites, no matter the phase they belong to, are spatially coherent to each other. Freshly cleaved {100}-faces show surface domains, surrounded by canyons, and surface steps. These domains are plenty of knolls (1.8 +/- 0.1 knolls/mu m(2)) with a corresponding average knoll-profile full-width-at-half-maximum-value of 0.054 +/- 0.003 mu m, suggesting t
Filiaciones:
Cordero-Borboa A.E.:
Univ Nacl Autonoma Mexico, Inst Fis, Dept Mat Condensada, Mexico City 01000, DF, Mexico
Mijangos R.R.:
Centro de Investigación en Física, Universidad de Sonora, A.P. 5-88, Sonora, Hermosillo 83190, Mexico
Flores-Morales L.:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Fis, Mexico City 04510, DF, Mexico
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