Author(s):
1. Manzoor Ahmad Badar:
Department of Physics, University of Sargodha,Sargodha, Pakistan
2. Safdar Hussain:
Department of Physics, University of Sargodha,Sargodha, Pakistan
3. Shanawer Niaz:
Department of Physics, University of Sargodha,Sargodha, Pakistan
4. Saifur Rehman:
Department of Earth Sciences, University of Sargodha,Sargodha, Pakistan
Abstract:
Samples of emerald collected from carbonate-talc rocks in Mingora and Charbagh mines in Swat valley were investigated by powder X-ray diffraction method. Qualitative phase analyses of the samples showed the presence of emerald as major phase with quartz, talc and magnesite as minor phases in Mingora, and emerald as major phase with traces of quartz and talc in Charbagh sample. Lattice parameters were determined by employing CuKa radiations using a computer program 'Powder'. The lattice parameters of the Mingora and Charbagh specimens (with CuKa wavelength = 0.15418 nm) are: a = 9.258 ± 0.009 (Å), c = 9.191 ± 0.017 (Å) and a = 9.259 ± 0.005 (Å), c = 9.214 ± 0.006 (Å) compared to NBS (National Bureau of Standards) beryl data a = 9.215 Å, c =9.192Å. The deviations in the unit cell dimensions (especially the increase in a) of the samples are attributed to the presence of additional components (Cr, Fe, Na and Mg) detected by X-ray fluorescence method.
Page(s):
13-24
DOI:
DOI not available
Published:
Journal: Journal of Himalayan Earth Sciences, Volume: 50, Issue: 1A, Year: 2017
Keywords:
Lattice parameters
,
Powder diffraction
,
Swat Valley
,
Emerald
,
Mingora
References:
References are not available for this document.
Citations
Citations are not available for this document.