Mineralogical characteristics of kyanite from Prilepec, Republic of Macedonia

Sijakova-Ivanova, Tena and Robeva-Čukovska, Lidija (2014) Mineralogical characteristics of kyanite from Prilepec, Republic of Macedonia. Geologica Macedonica, 28 (2). pp. 115-120. ISSN 0352 – 1206/ 1857 – 8586 (online)

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Abstract

This paper gives mineralogical characteristics of kyanite from village of Prilepec, R. Macedonia. Several samples were collected for research. The kyanite was identified by Scanning electron microscopy (SEM), coupled with an energy dispersive X-ray spectrometer (EDS), X-ray diffraction (XRD) and Infra red spectroscopy (IR). The use of these three methods showed that they are very useful methods for rapid mineral analysis contributing important analytical information.The results of the X-ray powder pattern, SEM analysis and Infra red spectroscopy enable straightforward identification of the studied mineral sample as kyanite. Kyanite is located east of village of Prilepec in micashist rocks which have lepidoblastic structure and schistose texture. It occurs in blue thin-bladed triclinic crystals and crystalline aggregates. Cleavage is perfect on {100}, good on {010}. Fracture is splintery. Kyanite is transparent to translucent. Lustre is vitreous or sub-vitreous. Hardness lengthwise 4–5, crosswize 6–7. Density 3.53–3.67 g/cm3 .The colour is blue. Origin on blue colouris due to the charge-transfer process Fe2+ → Fe3+, Fe2+ Ti4+ or Cr3+. In our samples concentration of Fe is 0.05–0.18 wt%, Ti concentration is 0.03– 0.11 wt%, while Cr concentration is 0.02–0.13 wt%.

Item Type: Article
Subjects: Natural sciences > Other natural sciences
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Tena Sijakova Ivanova
Date Deposited: 22 Jan 2015 13:26
Last Modified: 22 Jan 2015 13:26
URI: http://eprints.ugd.edu.mk/id/eprint/12017

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