Geodesic
Mechanism of phase transformations $\gamma$- and $\delta$-$\mathrm{FeOOH}$ during heat treatment in solutions $\mathrm{MeOH}$ ($\mathrm{Me}$–$\mathrm{Na}$, $\mathrm{K}$): model of crystal-forming complexes
Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika, no. 7 (2012), pp. 98-106 Cet article a éte moissonné depuis la source Math-Net.Ru

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Transformations of nanodispersed ferrum (III) oxy hydroxides of $\gamma$- and $\delta$-modifications at heat treatment in the open air (temperature interval $25$–$900^\circ$С) as well as at hydrothermal treatment ($175$–$220^\circ$С) in water and water solutions $\mathrm{MeOH}$ ($\mathrm{Me}$–$\mathrm{Na}$, $\mathrm{K}$) with concentration $1\leqslant \mathrm{C_{MeOH}}\leqslant 5$ mole/dm$^3$ are studied by methods of $\mathrm{X}$-ray phase analysis, raster and transmission electronic microscopy, thermogravimetry, masspectroscopy and $\mathrm{X}$-ray fluorescence analysis. Spheres of phases $\alpha$-$\mathrm{FeOOH}$ and $\alpha$-$\mathrm{Fe_2O_3}$ formation are specified. Possible structure of crystal-forming complexes formed in solutions and reactions running during their fusion in different atomically rough planes $\alpha$-$\mathrm{FeOOH}$ and $\alpha$-$\mathrm{Fe_2O_3}$ is considered. In terms of a model of crystal-forming complexes experimentally stated dependencies crystal habits as well as phase and disperse structure of formed products on parameters of hydrothermal treatment are explained.
Keywords: hydrothermal treatment, ferrum (III) oxy hydroxides, water solution $\mathrm{MeOH}$.
Mots-clés : phase transformations 
@article{VYURM_2012_7_a13,
     author = {V. Sh. Mirasov and R. R. Klescheva and V. A. German and D. G. Kleschev and Yu. I. Ryabkov},
     title = {Mechanism of phase transformations $\gamma$- and $\delta$-$\mathrm{FeOOH}$ during heat treatment in solutions $\mathrm{MeOH}$ ($\mathrm{Me}${\textendash}$\mathrm{Na}$, $\mathrm{K}$): model of crystal-forming complexes},
     journal = {Vestnik \^U\v{z}no-Uralʹskogo gosudarstvennogo universiteta. Seri\^a, Matematika, mehanika, fizika},
     pages = {98--106},
     year = {2012},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VYURM_2012_7_a13/}
}
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V. Sh. Mirasov; R. R. Klescheva; V. A. German; D. G. Kleschev; Yu. I. Ryabkov. Mechanism of phase transformations $\gamma$- and $\delta$-$\mathrm{FeOOH}$ during heat treatment in solutions $\mathrm{MeOH}$ ($\mathrm{Me}$–$\mathrm{Na}$, $\mathrm{K}$): model of crystal-forming complexes. Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika, no. 7 (2012), pp. 98-106. http://geodesic.mathdoc.fr/item/VYURM_2012_7_a13/

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