Research output: Contribution to journal › Article › peer-review
Application of Raman spectroscopy for identification of rinneite (K3NaFeCl6) in inclusions in minerals. / Grishina, Svetlana; Koděra, Peter; Goryainov, Sergey et al.
In: Journal of Raman Spectroscopy, Vol. 51, No. 12, 12.2020, p. 2505-2516.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Application of Raman spectroscopy for identification of rinneite (K3NaFeCl6) in inclusions in minerals
AU - Grishina, Svetlana
AU - Koděra, Peter
AU - Goryainov, Sergey
AU - Oreshonkov, Aleksandr
AU - Seryotkin, Yurii
AU - Šimko, František
AU - Polozov, Alexander G.
PY - 2020/12
Y1 - 2020/12
N2 - Solid daughter phases in fluid and salt melt inclusions in minerals provide important clues to characterization of mineral-forming processes. The analysis of the fluid inclusions often requires the exposure of the daughter minerals. Rinneite (K3NaFeCl6), which is a hygroscopic mineral, decomposes in air and cannot thus be identified by conventional methods. A combined approach has been applied for investigation of synthetic and natural rinneite to acquire its diagnostic Raman spectrum for a nondestructive identification. We used natural rinneite inclusions in halite, suitable for applying a complex of methods, to clear up the reference spectrum. Improved high-resolution X-ray diffraction (XRD) data obtained from natural rinneite inclusion are comparable with that of previously published, with similar unit cell dimensions. Polarized Raman spectra of natural inclusions were obtained using different geometries and polarization of the incident and scattered light. Interpretation of experimental Raman spectra was performed within the framework of lattice dynamics simulations and group analysis. Individual spectral bands are interpreted in terms of Raman-active vibrational modes of K3NaFeCl6 structural units. Raman spectrum of synthetic rinneite with main peaks at 75, 91, 103, 143, 167, 171, 187, and 239 cm−1 agrees well with the spectra of rinneite inclusions in halite from the Nepa potash deposit and rinneite daughter minerals in salt melt inclusions hosted by quartz veinlets from the porphyry gold systems in the Central Slovakia Volcanic Field. This provides a firm basis for any future identification of this mineral worldwide, using nondestructive Raman spectroscopy.
AB - Solid daughter phases in fluid and salt melt inclusions in minerals provide important clues to characterization of mineral-forming processes. The analysis of the fluid inclusions often requires the exposure of the daughter minerals. Rinneite (K3NaFeCl6), which is a hygroscopic mineral, decomposes in air and cannot thus be identified by conventional methods. A combined approach has been applied for investigation of synthetic and natural rinneite to acquire its diagnostic Raman spectrum for a nondestructive identification. We used natural rinneite inclusions in halite, suitable for applying a complex of methods, to clear up the reference spectrum. Improved high-resolution X-ray diffraction (XRD) data obtained from natural rinneite inclusion are comparable with that of previously published, with similar unit cell dimensions. Polarized Raman spectra of natural inclusions were obtained using different geometries and polarization of the incident and scattered light. Interpretation of experimental Raman spectra was performed within the framework of lattice dynamics simulations and group analysis. Individual spectral bands are interpreted in terms of Raman-active vibrational modes of K3NaFeCl6 structural units. Raman spectrum of synthetic rinneite with main peaks at 75, 91, 103, 143, 167, 171, 187, and 239 cm−1 agrees well with the spectra of rinneite inclusions in halite from the Nepa potash deposit and rinneite daughter minerals in salt melt inclusions hosted by quartz veinlets from the porphyry gold systems in the Central Slovakia Volcanic Field. This provides a firm basis for any future identification of this mineral worldwide, using nondestructive Raman spectroscopy.
KW - daughter mineral
KW - Fe-oxyhydroxides
KW - fluid inclusion
KW - rinneite
KW - weathering
KW - FLUIDS
KW - SIBERIA
KW - IRON
KW - CRYSTAL
KW - DEPOSIT
KW - FERRIHYDRITE
KW - SPECTRA
KW - SALT MELT
KW - TRANSFORMATIONS
UR - http://www.scopus.com/inward/record.url?scp=85092100880&partnerID=8YFLogxK
U2 - 10.1002/jrs.6005
DO - 10.1002/jrs.6005
M3 - Article
AN - SCOPUS:85092100880
VL - 51
SP - 2505
EP - 2516
JO - Journal of Raman Spectroscopy
JF - Journal of Raman Spectroscopy
SN - 0377-0486
IS - 12
ER -
ID: 25614067