Russian Journal of Physical Chemistry A

, Volume 91, Issue 13, pp 2613–2620 | Cite as

Dynamic Determination of Some Optical and Electrical Properties of Galena Natural Mineral: Potassium Ethyl Xanthate Solution Interface

  • D. Todoran
  • R. Todoran
  • E. M. Anitas
  • Zs. SzakacsEmail author
Structure of Matter and Quantum Chemistry


This paper presents results concerning optical and electrical properties of galena natural mineral and of the interface layer formed between it and the potassium ethyl xanthate solution. The applied experimental method was differential optical reflectance spectroscopy over the UV–Vis/NIR spectral domain. Computations were made using the Kramers–Kronig formalism. Spectral dependencies of the electron loss functions, determined from the reflectance data obtained from the polished mineral surface, display van Hove singularities, leading to the determination of its valence band gap and electron plasma energy. Time dependent measurement of the spectral dispersion of the relative reflectance of the film formed at the interface, using the same computational formalism, leads to the dynamical determination of the spectral variation of its optical and electrical properties. We computed behaviors of the dielectric constant (dielectric permittivity), the dielectric loss function, refractive index and extinction coefficient, effective valence number and of the electron loss functions. The measurements tend to stabilize when the dynamic adsorption-desorption equilibrium is reached at the interface level.


galena natural mineral–potassium ethyl xanthate interface adsorption differential optical reflectance spectroscopy Kramers–Kronig formalism electrical and optical properties 


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Copyright information

© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  • D. Todoran
    • 1
  • R. Todoran
    • 1
  • E. M. Anitas
    • 2
    • 3
  • Zs. Szakacs
    • 1
    Email author
  1. 1.Technical University of Cluj Napoca, North University Centre of Baia MareBaia Mare, MaramuresRomania
  2. 2.Joint Institute for Nuclear ResearchDubna, Moscow oblastRussia
  3. 3.Horia Hulubei National Institute of Physics and Nuclear EngineeringBucharest-MagureleRomania

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