Title :
Crystal structure of Mongolian phosphorite minerals and mechanochemistry
Author :
Batdemberel, G. ; Amgalan, J. ; Sangaa, D. ; Chadraabal, Sh ; Jargalbat, P.
Author_Institution :
Sch. of Mater. Sci., Mongolian Univ. of Sci. & Technol., Ulaanbaatar, Mongolia
Abstract :
We have carried out crystal structure investigations of natural and mechanochemically activated samples of Burenkhan, Tsakhir uul and Aldarkhan phosphorite deposits (The Nord Mongolia) by X-ray, neutron and synchrotron powder diffraction techniquies. We have determined the exact mineral contents of the phosphorite ore and crystallochemical formula of each mineral. It was established that natural samples of Tsakhir uul and Aldarkhan phosphorite deposits contain flourite (CaF2) among the main ore minerals (Ca5(PO4)3F and SiO2). However, in the sample of Tsakhir uul amount of CaF2 is more than in the Aldarkhan sample. It was shown that as a result of mechanochemical activations any new crystal phases formed. However, occured strong distortion in the crystal lattice of flourapatite, especially, in the PO4 -tetrahedrons that possibly lead to increasing of the lattice energy and to better solubility of apatite after mechanochemical activation.
Keywords :
X-ray diffraction; calcium compounds; crystal structure; distortion; lattice energy; neutron diffraction; quartz; solubility; Aldarkhan phosphorite; Ca5(PO4)3F-SiO2-CaF2; Mongolian phosphorite minerals; Tsakhir uul phosphorite; X-ray diffraction; crystal lattice; crystal structure; crystallochemical formula; distortion; flourapatite; lattice energy; mechanochemistry; neutron diffraction; phosphorite ore; solubility; synchrotron radiation diffraction; Mongolian phosphorite; Rietveld merhod; X-ray diffraction; crystal structure; mechanochemistry;
Conference_Titel :
Strategic Technology (IFOST), 2010 International Forum on
Conference_Location :
Ulsan
Print_ISBN :
978-1-4244-9038-7
Electronic_ISBN :
978-1-4244-9036-3
DOI :
10.1109/IFOST.2010.5667927
