Structure and thermal expansion of KGe{sub 2}(PO{sub 4}){sub 3}
- Univ. de Rennes (France). Lab. de Cristallochimie
- Faculte des Sciences, Rabat (Morocco)
KGe{sub 2}(Po{sub 4}){sub 3} has been prepared in both crystalline and vitreous forms. The NZP-type structure of the crystalline variety and its thermal expansion have been investigated by X-ray powder diffraction. The crystal structure has been refined by the Rietveld method in the space group R{bar 3}. The thermal expansion coefficients have been determined between room temperature and 600 C and compared to dilatometry measurements. The parameters a and c have a positive and isotropic behavior and the average macroscopic thermal expansion coefficient, <{alpha}>, is 10 {times} 10{sup {minus}6} C{sup {minus}1} at 600 C. A comparison with the thermal expansion of the related Li and Na compounds is reported.
- OSTI ID:
- 455232
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 1 Vol. 32; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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