VAPOR PRESSURES IN THE LIQUID SYSTEM RB20-B203. DERIVED THERMODYNAMIC DATA AND A STRUCTURAL INTERPRETATION

Abstract

By use of the transpiration method, the vapor pressures of the liquid system Rb2O-B2O3 between pure B2O3 and Rb2O . B2O3 were measured. The vapor over the entire composition range was an equimolar mixture of Rb2O and B2O3. Data from other sources indicate that the vapor molcule should be RbBO2. The activity of the RbBO2 in the melts showed a pronounced discontinuity at about 15 mole percent Rb2O. The activity and other thermodynamic data were compatible with a liquid structure based on Biscoe and Warren's theory, which describes the structures of alkali borate glasses. The activity of the RbBO2 in the melts and the vapor pressure of the RbBO2 above the melts could be decreased by the addition to the melt of oxygen-complexing cations.

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Document Details

Document Type
Technical Report
Publication Date
Jun 06, 1962
Accession Number
AD0278573

Entities

People

  • C. E. Adams
  • J. T. Quan

Organizations

  • Naval Radiological Defense Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Chemical Analysis
  • Chemical Synthesis
  • Chemistry
  • Critical Temperature
  • Crystal Structure
  • Enthalpy
  • Free Energy
  • Health Services
  • Heat Energy
  • Infrared Spectra
  • Ionic Liquids
  • Materials Science
  • Measurement
  • Physical Chemistry
  • Physical Properties
  • Silica Glass
  • Transitions

Fields of Study

  • Chemistry

Readers

  • Combustion science or combustion engineering.
  • Materials Science and Engineering.
  • Polar and Arctic Studies