کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1333907 | 979117 | 2006 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Structural investigations of lead–strontium fluoroapatites Structural investigations of lead–strontium fluoroapatites](/preview/png/1333907.png)
Solid solutions in the system Pb(10−x)Srx(PO4)6F2, 0⩽x⩽10, were obtained as apatitic phases from aqueous medium. They were investigated by X-ray diffraction, chemical analysis and infrared (IR) spectroscopy. The results of the structural refinements indicated that the substitution of lead by strontium induces a regular decrease of the lattice constant “a” and a preferential strontium distribution in site M(1). A progressive shift of the F− ion position along the apatitic channel was detected and confirmed by IR evidence. The different character of the M–F and M–O interactions was invoked to justify the structural differences observed as a function of composition.
The structural refinements carried out on five Pb(10−x)Srx(PO4)6F2 samples evidence preferential distribution of cations in metal sites and a progressive shift of the F− ion.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 179, Issue 10, October 2006, Pages 3065–3072