Advances in Mössbauer, Raman, X-ray Diffraction and X-ray Photoelectron Spectroscopy of Minerals

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Crystallography and Physical Chemistry of Minerals & Nanominerals".

Deadline for manuscript submissions: closed (28 February 2024) | Viewed by 2108

Special Issue Editors


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Guest Editor
A. Chelkowski Institute of Physics, University of Silesia, 1 75 Pulku Piechoty St., 41-500 Chorzow, Poland
Interests: Fe oxides; mineral processing; high temperature transformation; mixed valence state; charge transfer; environment protection

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Guest Editor
Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia and Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A, PL-41500 Chorzow, Poland
Interests: silica; porous materials; metal nanoparticles; composites; mayenites; capturing agents
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Special Issue Information

Dear Colleagues,

Mössbauer, X-ray diffraction, and spectroscopy techniques have been widely used for investigating minerals for many years. As we know, the Mössbauer effect is beneficial for studying the iron content and the nature of the environment of iron atoms in Fe-bearing minerals or the determination of the Fe3+/Fe2+ ratio. Raman and infrared spectroscopy are usually applied to characterize organic and inorganic materials. Both techniques provide information about structural point defects, isomorphic substitution, as well as structural and chemical changes. X-ray diffraction is an indispensable tool in the structural characterization of not only minerals but many different materials. Finally, as a surface-sensitive technique, X-ray photoelectron spectroscopy is widely used to characterize surfaces, especially to identify the surroundings of the atom and estimate the chemical composition of the material. Lately, we have been able to reinvent these techniques oneself and introduce much more information about the investigated materials than in the past. Hopefully, this Special Issue will contribute to showcasing the new frontiers in minerals science by using these methods separately or together.

Prof. Dr. Mariola Kadziolka-Gawel
Prof. Dr. Mateusz Dulski
Guest Editors

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Keywords

  • Mössbauer spectroscopy of minerals
  • X-ray diffraction
  • X-ray photoelectron spectroscopy
  • Raman spectroscopy
  • mineral exploration
  • crystal structure
  • phase transformation
  • modeling
  • cation distribution and migration
  • mineral processing
  • novel mineral applications
  • structural features
  • surface area and modification
  • charge density
  • porous structures
  • metal capturing

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Published Papers (1 paper)

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Research

15 pages, 2129 KiB  
Article
Zn(NH3)2Cl2, a Mineral-like Anthropogenic Phase with Ammine Complexes from the Burned Dumps of the Chelyabinsk Coal Basin, South Urals, Russia: Crystal Structure, Spectroscopy and Thermal Evolution
by Andrey A. Zolotarev, Margarita S. Avdontceva, Rezeda M. Sheveleva, Igor V. Pekov, Natalia S. Vlasenko, Vladimir N. Bocharov, Maria G. Krzhizhanovskaya, Anatoly A. Zolotarev, Mikhail A. Rassomakhin and Sergey V. Krivovichev
Minerals 2023, 13(8), 1109; https://doi.org/10.3390/min13081109 - 21 Aug 2023
Cited by 2 | Viewed by 1612
Abstract
The mineral-like anthropogenic phase Zn(NH3)2Cl2, with ammine (NH30) complexes from the burned dumps of the Chelyabinsk coal basin (South Urals, Russia), has been investigated using single-crystal and high-temperature powder X-ray diffraction, and Raman and [...] Read more.
The mineral-like anthropogenic phase Zn(NH3)2Cl2, with ammine (NH30) complexes from the burned dumps of the Chelyabinsk coal basin (South Urals, Russia), has been investigated using single-crystal and high-temperature powder X-ray diffraction, and Raman and infrared (IR) spectroscopy. The anthropogenic Zn(NH3)2Cl2 is orthorhombic, Imma, a = 7.7399(6), b = 8.0551(5), c = 8.4767(8) Å, V = 528.49(7) Å3, R1 = 0.0388 at −73 °C. Its crystal structure is based upon isolated ZnN2Cl2 tetrahedra connected by hydrogen bonds (between NH3 groups and Cl atoms) into a three-dimensional network. Upon heating, the Zn(NH3)2Cl2 phase is stable up to about 150 °C, which is in good agreement with the data on the temperature of its formation. The crystal structure of Zn(NH3)Cl2 expands anisotropically with the strongest thermal expansion observed along the a axis. The thermal expansion of the structure is controlled by the changes in the hydrogen bonding system. The Raman and IR spectroscopic characteristics of this phase are close to those of the mineral ammineite, CuCl2(NH3)2. The studied anthropogenic phase, formed in the unique conditions of burned coal dumps, is identical to the synthetic Zn(NH3)2Cl2. Full article
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