High-Temperature Oxide and Hydroxide Vapor Species of Technetium

@inproceedings{Gibson1993HighTemperatureOA,
  title={High-Temperature Oxide and Hydroxide Vapor Species of Technetium},
  author={John K. Gibson},
  year={1993}
}
In order to better characterize the high-temperature chemistry of technetium, its oxide was exposed to low pressures ( ~ 10 Pa) of oxygen and/or water vapor up to 1100°C in a platinum Knudsen cell reactor. The resulting volatile products were identified mass spectrometrically. The significant technetium vapor species identified from the mass spectra were the following: Tc03(g), Tc207(g), Tc03(0H)(g), Tc2Os(g) and Tc02(0H)3(g); the last two of these were previously unreported. The identification… 

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References

SHOWING 1-10 OF 21 REFERENCES

Knudsen Effusion Mass Spectrometric Determination of Metal Hydroxide Stabilities

Knudsen effusion mass spectrometric measurements of gaseous equilibria in vapors of Cr and Fe oxides, with admission of hydrogen or deuterium into an effusion cell, have been conducted. From the

Technetium Volatilization During HLLW Vitrification

The volatilization of technetium in the course of high-level waste vitrification may be considerable, depending on process variations. A series of experiments has been performed in order to gain more

MASS SPECTROMETRIC STUDY OF THE RHENIUM--OXYGEN SYSTEM.

Rhenium, having the second highest melting point among the metals, is used for refractory containers. Thermodynamic values for rhenium oxide is determined by mass spectrometry and X ray diffraction.

Advanced Inorganic Chemistry 8th Ed.