REACTIONS OF NIOBIUM OXYCHLORIDES WITH ALKALI CHLORIDES AND THERMAL STABILITY OF PENTACHLOROOXYNIOBATES (in Russian)
Journal Article
·
· Zh. Neorgan. Khim.
OSTI ID:4148289
Studies of niobium oxychloride reaction with alkali chlorides showed that at atmospheric pressure and 150 to 500 deg C temperature niobium oxychlorides do not react with NaCl. Niobium oxychlorides react with K, Rb, and Cs chlorides forming pentachlorooxyniobates Me/sub 2/NbOCl/sub 5/ and tetrachlorooxyniobates MeNbOCl/sub 4/ where Me is K, Rb, and Cs cations with melting points 500, 570, and 640 deg C, respectively. Melt disgrams were constructed for KCl-NbOCl/sub 3/ and CsCl--NbOCl/sub 3/. The vapor pressure of NbOCl/sub 3/ over pentachlorooxyniobates was studied as a function of temperature. It is shown that the stability decreases with the ion radius of compounds Cs/sub 2/NbOCl/sub 5/ > Rb/sub 2/NbOCl/sub 5/ > K/sub 2/NbOCl/sub 5/. Certain thermodynamic functions of pentachlorooxyniobates andd tetrachlorooxyniobates were determined. (R.V.J.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-001693
- OSTI ID:
- 4148289
- Journal Information:
- Zh. Neorgan. Khim., Journal Name: Zh. Neorgan. Khim. Vol. Vol: 8
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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