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The Texture and Heat Treatment of Hydrated Tin (IV) Oxides

  • B. J. Dalgleish
  • D. Dollimore
  • D. V. Nowell

Abstract

Various preparations of hydrated tin (IV) oxides are reported. These are classed as α- or β- stannic acids according to their stability in concentrated hydrochloric acid. Precipitation in the cold gives α- stannic acid, whilst preparations at high temper­ature result in β- stannic acid; the former being of smaller particles than those of the latter.

The surface texture of these preparations have been character­ised from their nitrogen adsorption isotherms. They have been subjected to thermogravimetric analysis (TG), differential thermal analysis (DTA) and X-ray diffraction. There is no formation of stoichiometric hydrates in the oxide system but water is adsorbed on the particles which can be identified as small crystallites of cassiterites (SnO2).

Keywords

Adsorption Isotherm Differential Thermal Analysis Ammonium Chloride Concentrate Hydrochloric Acid Nitrogen Adsorption Isotherm 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • B. J. Dalgleish
    • 1
  • D. Dollimore
    • 1
  • D. V. Nowell
    • 1
  1. 1.The Chemistry Department, Halfield Polytechnic and The Chemistry DepartmentUniversity of SalfordUK

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