A Raman spectroscopic comparison of calcite and dolomite

Sun, Junmin; Wu, Zhuangchun; Cheng, Hongfei; Zhang, Zhanjun; Frost, Ray L.

doi:10.1016/j.saa.2013.08.014

Cited by 141 publications

(78 citation statements)

References 18 publications

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“…The carbonaceous component spectra are consistent with disordered graphitic bands at 1580 and 1350 cm −1 , and the bands positioned at 465, 204, and 128 cm −1 correlate well with α ‐quartz . Finally, the bands positioned at 1087, 713, 282, and 156 cm −1 are consistent with calcite, and gypsum bands observed at 1009, 669, 626, 606, 497, and 419 cm −1 . No observed changes in the spectra were recorded with time suggesting little to no photodecomposition of the sample occurred.…”

Section: Resultssupporting

confidence: 59%

Shell-isolated nanoparticle-enhanced Raman spectroscopy characterization of oxide ores during thiosulfate-mediated gold leaching

Smith

Baron²,

Choi

et al. 2016

J. Raman Spectrosc.

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An applied approach for in situ characterization of oxide ore samples exposed to a thiosulfate‐based leaching solution with shell‐isolated nanoparticle‐enhanced Raman spectroscopy (SHINERS) is discussed. Differences in passive layer growth during thiosulfate leaching were observed in the SHINERS spectra between the untreated and pressure oxidation (POX)‐treated oxide ore samples received from Barrick Gold Corporation. The SHINERS spectra revealed that the passive layer at the untreated oxide ore–electrolyte interface contains metal sulfides and significant quantities of polysulfide chains bold(boldSboldn/boldSboldn2−bold) of variable lengths after longer exposure to the leaching solution. However, the passive layer observed with the POX‐treated sample was found to be predominantly metal sulfides with only a small quantity of polysulfide chains. From these results, it was concluded that the POX pretreatment process may successfully destroy or inactivate minerals found in the ore that are responsible for catalysing thiosulfate decomposition into polysulfides which results in low gold extraction efficiencies. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Resultssupporting

confidence: 59%

Shell-isolated nanoparticle-enhanced Raman spectroscopy characterization of oxide ores during thiosulfate-mediated gold leaching

Smith

Baron²,

Choi

et al. 2016

J. Raman Spectrosc.

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“…As can be seen, the spectra were very similar an contained a strong band at 1086 cm À1 in addition to two rather smaller ones at 712 and 281 cm À1 . These wavenumbers indicate that the compound responsible for the white pigment in these specimens is calcium carbonate in calcite form [23] (see Table 1) and rule out the presence of the other above-mentioned carbonates. Therefore, the white zone must correspond to the preparatory layer.…”

Section: White Colourmentioning

confidence: 65%

“…3). These bands are typical of calcium carbonate in the form of calcite [23] and are due to the following C-O bond vibrations in CO 3 2À groups: m 1 (A 1g ) symmetric stretching in the band at 1086 cm À1 , m 4 (E g ) in-plane deformation in that at 712 cm À1 and m 13 (E g ) skeletal vibration in that at 281 cm À1 .…”

Section: Supportmentioning

confidence: 98%

Raman microspectroscopic analysis of decorative pigments from the Roman villa of El Ruedo (Almedinilla, Spain)

Mateos

Cosano

Mora

et al. 2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…The application of Raman spectroscopy to finger-print carbonates is well documented [20,21,33,34], as is the issue of excessive background noise associated commonly with laser induced fluorescence, which is frequently encountered when dealing with natural calcite crystals and which at its extreme makes it impossible to obtain valid Raman spectra. In addition, sample morphology, defect structure, crystallinity and grain size/porosity variability can also generate excessive background scattering [35,36].…”

Section: Laser Raman Analysismentioning

confidence: 99%

Sourcing limestone masonry for restoration of historic buildings, a spectroscopic pilot study

Hopkinson

Rutt

Kristová

et al. 2015

Journal of Cultural Heritage

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This study presents a combined Fourier transform (FT) mid-infrared, laser Raman and Commission Internationale d’Eclairage (CIE) L*a*b* system analysis of quarry-derived impure limestone and fallen masonry from a medieval listed building situated in the south east of England, to ascertain how spectroscopic information can be collectively employed to identify the most exacting possible replacement stone source. Data shows that subtle differences in [Al] and [Fe3+] octahedral and tetrahedral site occupancy in glauconite group clays registered in the mid-infrared [3530cm-1/3620cm-1] absorption ratio exerts some influence on L*Cab*hab* values. Increases in L* and Cab are associated with decreasing clay content. The overall weakness of correlations between infrared and visible range spectral attributes indicates multiple contributing sources to overall color. Evidence indicates that the degree of laser Raman induced background noise is related to the overall calcite content and that activators of fluorescence at 785nm excitation wave length may also contribute to rock color. The results are utilized to define closest matching quarry samples to the fallen masonry

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A Raman spectroscopic comparison of calcite and dolomite

Cited by 141 publications

References 18 publications

Shell-isolated nanoparticle-enhanced Raman spectroscopy characterization of oxide ores during thiosulfate-mediated gold leaching

Shell-isolated nanoparticle-enhanced Raman spectroscopy characterization of oxide ores during thiosulfate-mediated gold leaching

Raman microspectroscopic analysis of decorative pigments from the Roman villa of El Ruedo (Almedinilla, Spain)

Sourcing limestone masonry for restoration of historic buildings, a spectroscopic pilot study

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