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Thermochemistry of Metal Nitrides in the Ca/Zn/N System
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AbstractThe energetics of ternary oxide formation is reasonably well understood, but little is known of the energetics of ternary nitride formation. We have developed new procedures for high‐temperature oxide melt solution calorimetry on metal nitrides and employed them to study compounds in the Ca/Zn/N system. The calorimetry utilized the easy reduction of MoO3 in the solvent to supply a pathway for rapid oxidation of “N3–” to N2 gas. These experiments represent the first high‐temperature solution calorimetry of ternary metal nitrides. The results indicate that Ca3N2 acts as a basic nitride analogous to CaO in oxide systems, while Zn3N2 acts as an acidic nitride (“N3–” acceptor) in this ternary nitride system.
Title: Thermochemistry of Metal Nitrides in the Ca/Zn/N System
Description:
AbstractThe energetics of ternary oxide formation is reasonably well understood, but little is known of the energetics of ternary nitride formation.
We have developed new procedures for high‐temperature oxide melt solution calorimetry on metal nitrides and employed them to study compounds in the Ca/Zn/N system.
The calorimetry utilized the easy reduction of MoO3 in the solvent to supply a pathway for rapid oxidation of “N3–” to N2 gas.
These experiments represent the first high‐temperature solution calorimetry of ternary metal nitrides.
The results indicate that Ca3N2 acts as a basic nitride analogous to CaO in oxide systems, while Zn3N2 acts as an acidic nitride (“N3–” acceptor) in this ternary nitride system.
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