Journal ArticleDOI
Coordination sites of metals in tetrahedrite minerals determined by exafs
Reads0
Chats0
TLDR
In this paper, the results of multi-element EXAFS spectroscopy have been used in the investigation of a chemically and structurally complex mineralogical system, and the results have shown the value of multispectral spectrograms in the analysis of complex mineral structures.About:
This article is published in Journal of Solid State Chemistry.The article was published on 1989-10-01. It has received 29 citations till now. The article focuses on the topics: Tetrahedrite & Tetrahedral molecular geometry.read more
Citations
More filters
Journal ArticleDOI
Oxidation state variations in copper minerals studied with Cu 2p X-ray absorption spectroscopy
TL;DR: In this paper, the 2p absorption spectra of divalent and monovalent copper minerals are presented, and the differences in the spectra can be used to distinguish between the two oxidation states, which has been applied to copper sulphide tetrahedrite complexes.
Journal ArticleDOI
Structural stability of the synthetic thermoelectric ternary and nickel-substituted tetrahedrite phases
Tristan Barbier,Pierric Lemoine,Stéphanie Gascoin,Oleg I. Lebedev,Andreas Kaltzoglou,Paz Vaqueiro,Anthony V. Powell,Ronald I. Smith,Emmanuel Guilmeau +8 more
TL;DR: In this article, the purity and structural stability of the high thermoelectric performance Cu12Sb4S13 and Cu10.4Ni1.6Sb 4S13 tetrahedrite phases were studied at high temperature by Rietveld refinement using high resolution X-ray powder diffraction data, DSC/TG measurements and high resolution transmission electron microscopy.
Journal ArticleDOI
Sulphide mineral surfaces: theory and experiment
TL;DR: In this paper, the surface geometry of metal sulphide minerals is investigated using a range of theoretical models and methods, ranging from isolated cluster to full lattice, and from atomistic to fully quantum mechanical.
Journal ArticleDOI
Geological applications of synchrotron radiation
TL;DR: In this paper, a review of recent work in synchrotron-based, Earth sciences research can be found, with special attention being given to X-ray absorption studies; Xray diffraction and Xray fluorescence microprobe applications are considered more briefly.
Journal ArticleDOI
The role of Fe2+ and Fe3+ in synthetic Fe-substituted tetrahedrite
TL;DR: Tetrahedrites with the composition between Cu12Sb4S13 and Cu10Fe2Sb 4S13 were synthesized at 457 °C and 500 °C from the elements and carefully studied by Mossbauer spectroscopy of 57Fe.
References
More filters
Journal ArticleDOI
Theory of the extended x-ray absorption fine structure
TL;DR: In this article, a theory of the absorption fine structure starting from theoretically obtained electron-atom scattering phase shifts is presented, where the electron scattering is treated using a spherical wave expansion which takes into account the finite size of the atoms.
Journal ArticleDOI
A rapid, exact curved-wave theory for EXAFS calculations
S J Gurman,N Binsted,I Ross +2 more
TL;DR: A simplified version of the exact curved-wave theory of EXAFS is described in this article, where the simplifications arise from the angle-averaging process which is necessary when analysing data from polycrystalline or amorphous samples.
Journal ArticleDOI
Thickness effect on the extended-x-ray-absorption-fine-structure amplitude
Edward A. Stern,K. H. Kim +1 more
TL;DR: In this article, a series of copper foils of varying thicknesses were measured to determine the most accurate values of EXAFS amplitude for copper metal which agree well with theory as corrected for the many-body overlap effect.
Journal ArticleDOI
The crystal structure refinement of chalcopyrite, CuFeS2
S. R. Hall,J. M. Stewart +1 more
TL;DR: The crystal structure of chalcopyrite, CuFeS2, has been refined to an R value of 0.031 using multiple sets of 4-circle diffractometer data and full-matrix least-squares procedures.
Journal ArticleDOI
The crystal structure of tetrahedrite, Cu12Sb4S13
TL;DR: In this article, the absolute configuration of the tetrahedrite structure was established and the least squares refinement in this study reduced an initial disagreement index of 27.9% to 3.9%, and thus confirmed the correctness of the structure.