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Electron-microscopic investigation of chromium hydroxide in the process of precipitation

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Conclusions

  1. 1.

    The process of precipitation of Cr(OH)3 at constant pH was studied electron microscopically.

  2. 2.

    The precipitation process is a complex process, which proceeds through the formation of a crystalline phase in the initial period, with subsequent amorphization and crystallization of the amorphous stage during aging.

  3. 3.

    The absence of reflections of Cr(OH)3 on x-ray diffraction patterns is due to the effect of pseudomorphism.

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Literature cited

  1. 1.

    A. M.Rubinshtein, A. V. Sagalovich, A. L. Klyachko-Gurvich, A. A. Slinkin, G. A. Ashavskaya, and I. V. Mel'nikova, Izv. Akad. Nauk SSSR, Ser. khim., 1703 (1967).

  2. 2.

    A. M. Rubinshtein, M. I. Dashevskii, V. I. Yakerson, L. A. Gorskaya, and D. P. Shashkin, Izv. Akad. Nauk SSSR, Ser. khim., 1936 (1967).

  3. 3.

    Beilar, Jr., Collection: Syntheses of Inorganic Preparations [Russian translation], “Mir” (1966),p.3.

  4. 4.

    P. Selwood, Collection: Catalysis; Problems of Theory and Methods of Investigation [Russian translation], IL (1955), p. 444.

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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 27–29, January, 1968.

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Dashevskii, M.I., Slinkin, A.A., Fedorovskaya, É.A. et al. Electron-microscopic investigation of chromium hydroxide in the process of precipitation. Russ Chem Bull 17, 23–26 (1968). https://doi.org/10.1007/BF00914630

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Keywords

  • Precipitation
  • Reflection
  • Crystallization
  • Chromium
  • Hydroxide