Dielectric behaviors at microwave frequencies and Mössbauer effects of chalcedony, agate, and zultanite

doi:10.1088/1674-1056/24/5/059101

Abstract In this study, dielectric properties within 8–12 GHz microwave frequencies, inductively coupled plasma-atomic emission spectrometry, Fourier transform infrared spectrometry, synchronized two thermal analyses, and ⁵⁷Fe Mössbauer spectroscopy analysis of chalcedony, agate, and zultanite samples from Turkey are presented. Agate and chalcedony show the same nine vibrational absorption peaks obtained unlike zultanite from FTIR spectra in the 350 cm^-1 to 4000 cm^-1 range, ε' values of chalcedony, agate and zultanite derived at 10.5 GHz were 4.67, 4.41, and 7.34, respectively, ε' and ε" values of the studied samples at the microwave frequencies are related to the percentage weight of their constituent parts in their chemical compositions. ⁵⁷Fe Mössbauer spectroscopy results confirm the existence of iron-containing islands in the crystal structure of zultanite, agate, and chalcedony samples, equipped them with magnetic features typical for magnetic nanoparticles including superparamagnetism. The presence of iron-containing islands significantly affects the magnetic, dielectric, and optical properties of studied samples that are not observed for pure minerals without any foreign inclusions.

Keywords: zultanite agate chalcedony microwave dielectric properties Mössbauer effects

Received: 07 August 2014
Revised: 18 October 2014
Accepted manuscript online:

PACS:	91.60.Mk	(Optical properties)
	78.20.Ci	(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
	75.20.En	(Metals and alloys)
	91.25.F-	(Rock and mineral magnetism)

Fund: Project Project LO1305 and Operational Program Education for Competitiveness-European Social Fund of the Ministry of Education, Youth and Sports of the Czech Republic (Grant No. CZ.1.07/2.3.00/20.0155), and the Internal Student Grant IGA of Palacky University in Olomouc, Czech Republic (Grant No. IGA PrF 2014017).

Corresponding Authors: Levent Paralı
E-mail: levent.parali@cbu.edu.tr

About author: 91.60.Mk; 78.20.Ci; 75.20.En; 91.25.F-

Cite this article:

Levent Parali, İsrafil Şabikoğlu, Jiri Tucek, Jiri Pechousek, Petr Novak, Jakub Navarik Dielectric behaviors at microwave frequencies and Mössbauer effects of chalcedony, agate, and zultanite 2015 Chin. Phys. B 24 059101

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Dielectric behaviors at microwave frequencies and Mössbauer effects of chalcedony, agate, and zultanite

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