Synthesis, Structural Study and Thermal Expansion of Cesium Dititanium Tris(Phosphate)
The new phosphate CsTi2(PO4)3 was synthesized by precipitating method and characterized by scanning electron microscopy with energy-dispersive X-ray microanalyzer, X-ray powder diffraction and IR-spectroscopy. The structure refinement of the phosphate was carried out by a Rietveld analysis. CsTi2(PO...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
al-Farabi Kazakh National University
2010-11-01
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| Series: | Eurasian Chemico-Technological Journal |
| Online Access: | http://ect-journal.kz/index.php/ectj/article/view/498 |
| Summary: | The new phosphate CsTi2(PO4)3 was synthesized by precipitating method and characterized by scanning electron microscopy with energy-dispersive X-ray microanalyzer, X-ray powder diffraction and IR-spectroscopy. The structure refinement of the phosphate was carried out by a Rietveld analysis. CsTi2(PO4)3 crystallizes with the cubic system (space group Ia 3d), its unit-cell parameters: a = 19.909(5) Å, V = 7892(1) Å3. It has the framework structure formed by TiO6 octahedra and PO4 tetrahedra, the two type positions of Cs+ cations are in the cavities of the structure. CsTi2(PO4)3 structure features are discussed. The results of the undertaken study showed that cesium dititanium tris(phosphate) crystal structure differs from its isoformulic analogues CsZr2(PO4)3 and AM2(PO4)3 (A = Na, K, Rb; M = Ti, Zr), crystallizing in the trigonal system (space group R3c) with the kosnarite type. Thermal expansion of the CsTi2(PO4)3 was studied: aa = 7.85 . 10-6 oC-1, aV = 23.5 .10-6 oC-1 in the range 25–800 oC. |
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| ISSN: | 1562-3920 2522-4867 |