FT-Raman and infrared spectroscopic study of aragonite-strontianite (CaxSr1 − xCO3) solid solution

Alía, J. M.; Díaz-de-Mera, Yolanda; Edwards, Howell G. M.; Martin, P.; Sánchez‐Pernaute, Andrés

doi:10.1016/s1386-1425(97)00175-3

Cited by 64 publications

(58 citation statements)

References 23 publications

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“…This effect has been used to estimate concentrations of different ions within a solid structure with the same orientation [17]. Systematic variations of spectral bands are also particularly useful in the analysis of minerals, as band shifts can be linked to solid solution composition [18]. Figure 1.…”

Section: Background To Raman Spectroscopymentioning

confidence: 99%

“…Therefore, isotopic substitution is reflected in the Raman spectra as a shift in the spectral bands upon incorporation of different isotopes into a vibrating group. For example, 100 at.% enrichment of 30 Si or 18 O into the mineral phase alpha-quartz produces shifts in the Raman bands of up to 20 cm −1 and 50 cm −1 , respectively [9]. Raman spectroscopy is not as sensitive to isotopic composition as more traditional methods for examining isotope incorporation such as mass spectrometry.…”

Section: Isotopes In Raman Spectroscopymentioning

confidence: 99%

“…These can be assigned to molecular groups with specific isotopic compositions, called isotopologues. For example, the carbonate symmetrical stretching band in calcite at 1086 cm −1 is split into four bands upon 18 O substitution into the carbonate group [24]. Each of these bands corresponds to the different isotopologue of the carbonate group, namely C 16 Figure 2.…”

Section: Isotopes In Raman Spectroscopymentioning

confidence: 99%

“…We can also trace isotope incorporation in the dissolved components, for example 18 O incorporation into oxyanions. Experiments show that substitution of 18 O into aqueous phosphate ions produce distinct new bands at lower wavenumbers that reflect the presence of new isotopologue species [47], as observed for phosphate-bearing crystals [26].…”

Section: Examining the Properties Of Ions In Solution Using Raman Spementioning

confidence: 99%

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Tracing Mineral Reactions Using Confocal Raman Spectroscopy

Geisler

2018

Minerals

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Raman spectroscopy is a powerful tool used to identify mineral phases, study aqueous solutions and gas inclusions as well as providing crystallinity, crystallographic orientation and chemistry of mineral phases. When united with isotopic tracers, the information gained from Raman spectroscopy can be expanded and includes kinetic information on isotope substitution and replacement mechanisms. This review will examine the research to date that utilizes Raman spectroscopy and isotopic tracers. Beginning with the Raman effect and its use in mineralogy, the review will show how the kinetics of isotope exchange between an oxyanion and isotopically enriched water can be determined in situ. Moreover, we show how isotope tracers can help to unravel the mechanisms of mineral replacement that occur at the nanoscale and how they lead to the formation of pseudomorphs. Finally, the use of isotopic tracers as an in situ clock for mineral replacement processes will be discussed as well as where this area of research can potentially be applied in the future.

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Section: Background To Raman Spectroscopymentioning

confidence: 99%

Section: Isotopes In Raman Spectroscopymentioning

confidence: 99%

Section: Isotopes In Raman Spectroscopymentioning

confidence: 99%

Section: Examining the Properties Of Ions In Solution Using Raman Spementioning

confidence: 99%

See 2 more Smart Citations

Tracing Mineral Reactions Using Confocal Raman Spectroscopy

Geisler

2018

Minerals

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“…The changing chemical composition of the mixed carbonate phase is also characterized by the modifi ed energetics of various vibration modes of the carbonate ion by Fourier transform infrared (FTIR) spectroscopy ( Figure S8a,b, Supporting Information). From x = 0 to x = 0.3, vibration modes ν 3 E ′, ν 1 A 1 ′, and ν 4 E ′ increase in energy linearly with x due to a net increase in charge density with higher molar fraction of Ca 2+ withdrawing electron density from antibonding molecular orbitals in the carbonate ion [ 27 ] (Figure S8c, Supporting Information).…”

Section: Evolution Of the Bi-2212 Phasementioning

confidence: 99%

On the Mechanism of Cuprate Crystal Growth: The Role of Mixed Metal Carbonates

Green

Boston

Glatzel

et al. 2015

Adv Funct Materials

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The mechanism of formation of the superconductor Bi2Sr2CaCu2O8+x (Bi‐2212) has been an open question since its discovery in 1988. By controlling crystal growth through the use of biopolymers as multivalent cation chelating agents, it is demonstrated through X‐ray diffraction and thermogravimetric analysis, that it is the formation of a mixed metal carbonate eutectic that promotes the formation of the target phase. X‐ray diffraction experiments, supported by infrared spectroscopy, identify this phase as (Sr1−x Ca x )CO3. This knowledge allows to further reduce the eutectic melting point by the incorporation of a biopolymer rich in potassium ions, resulting in the scalable formation of Bi‐2212 at a temperature 50 °C lower than has been achieved previously.

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Fourier transform Raman spectroscopic study of Ba(SO4)x(CrO4)1−x solid solution

Alía

Edwards

Fernández

et al. 1999

J. Raman Spectrosc.

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solid solution (nature : hashemite) gel-grown crystals were studied using Fourier transform Ba(SO 4 ) x (CrO 4 ) 1-x Raman spectroscopy. The complex Raman spectrum of the end-member was studied in detail by means of BaCrO 4 bandshape analysis and component Ðtting procedures. Important e †ects of the crystalline Ðeld (both static and dynamic) were observed that could explain the evolution of the chromate anion Raman-active internal modes under the inÑuence of a second anion. SigniÐcant modiÐcations were likewise detected in the sulphate anion normal modes. The hindrance of the sulphate intermolecular couplings (dynamic e †ect of the crystalline Ðeld) when chromate anion replaces it in the unit cell could be the cause of the reported observations. It was possible to propose a qualitative assignment of the observed barium chromate Raman-active lattice modes by studying the evolution of such bands with the anion content. The six bands observed in the region 80-200 cm-1 of the barium chromate Raman spectrum can be interpreted as anion libration (one band), chromate anion translational vibrations (two bands) and barium-oxygen vibrations (three bands).

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FT-Raman and infrared spectroscopic study of aragonite-strontianite (CaxSr1 − xCO3) solid solution

Cited by 64 publications

References 23 publications

Tracing Mineral Reactions Using Confocal Raman Spectroscopy

Tracing Mineral Reactions Using Confocal Raman Spectroscopy

On the Mechanism of Cuprate Crystal Growth: The Role of Mixed Metal Carbonates

Fourier transform Raman spectroscopic study of Ba(SO4)x(CrO4)1−x solid solution

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