کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1331140 | 978997 | 2010 | 6 صفحه PDF | دانلود رایگان |
New bismuth calcium silicon oxide Ca4Bi4.3(SiO4)(HSiO4)5O0.95, with apatite structure has been synthesized. The structure was refined from powder X-ray diffraction data. The refinement revealed that the phase has P63/m (176) space group with unit cell parameters a=b=9.6090(7) Å, c=7.0521(7) Å, V=563.9 Å3 and c/a=0.734. The Rwp factor at Rietveld refinement was equal to 0.082. The synthesized phase has an unusual quantity of cation vacancies in a crystal lattice. Mechanisms of compensation of the excess charge of a lattice are considered and checked experimentally using the FT-IR spectroscopy, the thermal analysis and the XPS analysis.
The fragment Ca4Bi4.3(SiO4)(HSiO4)5O0.95 structure along c-axis in polygonal mode.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 183, Issue 7, July 2010, Pages 1484–1489