| Autor: |
El-Yacoubi, A., Brochu, R., Serghini, A., Lou?r, M., Alami Talbi, M., Lou?r, D. |
| Zdroj: |
Powder Diffraction; June 1997, Vol. 12 Issue: 2 p76-80, 5p |
| Abstrakt: |
A new mixed lead thorium phosphate, Pb0.5Th2(PO4)3, has been isolated in the system PbO?ThO2?P2O5. Its crystal structure (monoclinic symmetry, a=17.459(1) ?, b=6.8451(4) ?, c=8.1438(5) ?, ?=101.247(5)?, space group C2/c) has been determined from conventional monochromatic X-ray powder diffraction data. The structure is related to the MITh2(PO4)3structure type. Lead atoms are located in the channels parallel to the caxis, out of the twofold axis for 0.97 ?, and are statistically distributed on a quarter of crystallographic positions. The thermal stability of this material is greater than that of the monazite-type compound PbTh(PO4)2. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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