Infrared Spectra for Mineral Identification

Taylor, Dennis; Nenadic, Charles M.; Crable, John V.

doi:10.1080/0002889708506215

Cited by 39 publications

(35 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…VNIR-SWIR and IR spectroscopy has been used for qualitative and quantitative analysis for several decades (Taylor et al 1970;Stark et al 1986). Both are based on characteristic vibrations of chemical bonds in molecules, as well as electronic processes (the latter affects only radiation at 400 to 1,000 nm) (Ben-Dor et al 1999).…”

Section: Spectroscopymentioning

confidence: 99%

Reflectance Spectroscopy as a Tool for Monitoring Contaminated Soils

Schwartz¹,

Eshel²,

Ben‐Dor³

2011

Soil Contamination

View full text Add to dashboard Cite

Section: Spectroscopymentioning

confidence: 99%

Reflectance Spectroscopy as a Tool for Monitoring Contaminated Soils

Schwartz¹,

Eshel²,

Ben‐Dor³

2011

Soil Contamination

View full text Add to dashboard Cite

“…In this study, six minerals in Table 1, Kaolinite, Mulite, Muscovite, Pyrophyllite, Montmorillonite and Amorphous silica, were selected as typical interference minerals for investigation. Among the fourteen minerals in the Table, these six minerals are most often quoted as the interference minerals for quartz determination in past IR studies 5,11,13,16,17,[20][21][22][23] . They are commonly used as industrial materials and therefore thought to come into existence in many working environments.…”

Section: Spectrum Measurement Of Interference Mineralsmentioning

confidence: 99%

“…The interference minerals which are known to have a band close to 800 cm -1 are listed in Table 1 5,11,[13][14][15][16][17][18][19][20][21][22][23] . In this study, six minerals in Table 1, Kaolinite, Mulite, Muscovite, Pyrophyllite, Montmorillonite and Amorphous silica, were selected as typical interference minerals for investigation.…”

Section: Spectrum Measurement Of Interference Mineralsmentioning

confidence: 99%

Determining of Crystalline Silica in Respirable Dust Samples by Infrared Spectrophotometry in the Presence of Interferences

Ojima

2003

Journal of Occupational Health

View full text Add to dashboard Cite

Determining of Crystalline Silica in Respirable Dust Samples by Infrared Spectrophotometry in the Presence of Interferences: Jun Ojima. National Institute of Industrial Health—Infrared Spectrophotometry (IR) is now widely used to determine crystalline silica in industrial dust samples. Though the IR method has many advantages when dealing with respirable dust samples, some serious analytical errors are often caused by interference minerals contamination. These minerals have a characteristic absorption band corresponding in position to the analytical peak for crystalline silica. In this paper, six typical interference minerals (Kaolinite, Mullite, Muscovite, Pyrophyllite, Montmorillonite and Amorphous silica) were pre‐size controlled to respirable range and their infrared spectra were measured by means of an FT‐IR with the well known potassium bromide tablet technique. The effects of these interference minerals on the Japanese OEL or the administrative control level for respirable dust which depend on the silica content were calculated and expressed in figures. The measured absorption coefficients of the interference minerals and quartz were 1.36–6.98 Abs/mg and 24.46 Abs/mg, respectively. The absorption band height ratios of each interference minerals were also measured. Then the efficiency and applicability of two spectrum correction methods for the interference minerals, absorbance ratio method and difference spectrum method were examined by using artificially mixed samples (standard interference mineral + standard quartz). By comparing the quantifying results for the mixture samples, it was revealed that the interfered spectra were almost corrected successfully when using the difference spectrum method, whereas correction by the absorbance ratio method resulted in apparent negative errors. Furthermore, the difference spectrum method was proven to be superior to the absorbance ratio method in applicability.

show abstract

“…IR bands at 3420 and 1640 cm -1 are characteristic for OH molecules (Yamagishi et al, 1997). In addition, all bands under 1080 cm -1 represent chalcedonic quartz components (Taylor et al, 1970;Stockton and Fritsch, 1978). In some published papers (Mc Creery, 2005;Colomban and Prinsloo, 2009), relationship between main bands and vibrational modes of [SiO4] 4-tetrahedron in Raman and IR spectra have been interpreted as follows: Raman active symmetric stretching modes occur between 800 and 1050 cm-1 ; asymmetric IR active stretching between 900 and 1200 cm -1 ; symmetric Raman and IR active bending modes between 400 and 600 cm -1 ; asymmetric IR active bending modes between 500 and 700 cm -1 ; Raman and IR active rotational libration modes about 300 cm -1 ; and Raman and IR active transitional libration modes between 100 and 200 cm -1 (McCreery, 2005;Colomban and Prinsloo, 2009).…”

Section: Discussionmentioning

confidence: 97%

Optical and Cathodoluminescence Investigations of the Green Microcrystalline (Chrysoprase) Quartz

Hatipoğlu¹,

Yardımcı²

2014

JLA

View full text Add to dashboard Cite

Gem-quality green cryptocrystalline silica formation is relatively rare in nature, and has an interesting mineralogical crystallization and irradiation response of the fine fibrous silica. Chemical analyses of the green material reveal remarkable concentrations of some trace elements, such as nickel, iron, and chrome. They are certainly responsible for producing of the individual color production and irradiation luminescence response. Optical absorption spectroscopy shows that the dark green coloration is due to light transmittance at 528 nm in the visible region as a result of absorbance peak at 645 nm and about 360-410 nm absorbance band gap. These optical absorbance gaps are due to not only Ni ion content (4600 ppm) but also, Fe ion (13600 ppm) and Cr ion (823 ppm) contents. The cathodoluminescence spectra of the green material were taken into consideration in this study, and they were evaluated using "surpher, grapher, and axum" of the computer programs. In the spectra of alternative current cathodoluminescence with two-dimension, one major spectral emission band appears at readable intensity and magnitude in 90 Hz in the yellow wavelength region at 585 nm. In addition, the two-dimension cathodoluminescence spectra show that only the other major spectral emission band of cathodoluminescence appears at 90 Hz frequency in the green wavelength region at 530 nm.

show abstract

Infrared Spectra for Mineral Identification

Cited by 39 publications

References 3 publications

Reflectance Spectroscopy as a Tool for Monitoring Contaminated Soils

Reflectance Spectroscopy as a Tool for Monitoring Contaminated Soils

Determining of Crystalline Silica in Respirable Dust Samples by Infrared Spectrophotometry in the Presence of Interferences

Optical and Cathodoluminescence Investigations of the Green Microcrystalline (Chrysoprase) Quartz

Contact Info

Product

Resources

About