A Novel Convenient Synthesis of Mixed-Valence Ti III /Ti IV Double Phosphates Starting with Titanium Nitride TiN
A new synthetic approach for the low- and mixed-valence double titanium phosphates starting with titanium nitride, TiN, and based on the controlled oxidation of a low-valent metal in the phosphate melt is presented. The reaction of the system M I 2 O - P 2 O 5 - TiN (M I = Na, K) in air (800-1050 °C...
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| Veröffentlicht in: | Zeitschrift für Naturforschung. B, A journal of chemical sciences A journal of chemical sciences, 2000-04, Vol.55 (3-4), p.291-298 |
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| Hauptverfasser: | , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | A new synthetic approach for the low- and mixed-valence double titanium phosphates starting with titanium nitride, TiN, and based on the controlled oxidation of a low-valent metal in the phosphate melt is presented. The reaction of the system M
I
2
O - P
2
O
5
- TiN (M
I
= Na, K) in air (800-1050 °C) leads to loss of nitrogen, N
2
, and results in the formation of a number of double phosphates: KTiP
2
O
7
, K
2
TiniTiIV(PO
4
)
3
, KTiOPO
4
, NaTiP
2
O
7
, NaTi
2
(PO
4
)
3
and a new mixed-valent diphosphate, NaTi
III
Ti
IV
(P
2
O
7
)
2
. The mixed-valent species K
2
Ti
III
Ti
IV
(PO
4
)
3
and NaTi
III
Ti
IV
(P
2
O
7
)
2
were characterized by single crystal X-ray diffraction. The described synthetic procedure is proposed as a simple and convenient method for the preparation of lowand mixed-valent phosphate materials |
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| ISSN: | 0932-0776 1865-7117 |
| DOI: | 10.1515/znb-2000-3-411 |