The Identification of Gibbsite and Bayerite by Laser Raman Spectroscopy

Huneke, James T.; Cramer, Roger E.; Alvarez, Robustiano; El‐Swaify, S. A.

doi:10.2136/sssaj1980.03615995004400010027x

Cited by 19 publications

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“…Raman bands between 2800 and 3700 cm 1 are characteristic of the (OH) stretching modes. 2,3,8,10,14,18 The low-wavenumber region between 200 and 1200 cm 1 consists of υ(OH) and (OH) modes (Table 1) showed infrared absorption bands at 3617, 3520, 3428 and 3380 cm 1 .…”

Section: Resultsmentioning

confidence: 99%

“…1 Bayerite is very rare in nature but can be easily synthesized in the laboratory. 2 Gibbsite, boehmite and diaspore form the main constituents of bauxite and laterites, with gibbsite often being the predominant mineral 3 and diaspore a minor component. 1,4,5 Bauxite deposits provide industry with raw materials as the major source of aluminium.…”

Section: Introductionmentioning

confidence: 99%

“…14 Huneke et al 2 recommended Raman spectroscopy as an advanced technique over x-ray diffraction in the study of the mixture of gibbsite and bayerite. Rodgers et al 15,16 characterized medium to strong bands of natural gibbsite and bayerite, which were assigned to the vibration of hydroxyl groups, particularly at the stretching and deformation regions, using Raman spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Raman spectra in characterizing gibbsite, bayerite, diaspore and boehmite

Ruan

Frost

Kloprogge

2001

J Raman Spectroscopy

250

172

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High-quality Raman spectra were used for the characterization of alumina phases of gibbsite, bayerite, diaspore and boehmite. The Raman spectrum of gibbsite shows four strong, sharp bands at 3617, 3522, 3433 and 3364 cm −1 in the hydroxyl stretching region. The spectrum of bayerite shows seven bands at 3664, 3652, 3552, 3542, 3450, 3438 and 3420 cm −1 . Five broad bands at 3445, 3363, 3226, 3119 and 2936 cm −1 and four broad and weak bands at 3371, 3220, 3085 and 2989 cm −1 are present in the Raman spectrum of the hydroxyl stretching region of diaspore and boehmite. The hydroxyl stretching bands are related to the surface structure of the minerals. The Raman spectra of bayerite, gibbsite and diaspore are complex whereas the Raman spectrum of boehmite shows only four bands in the low-wavenumber region. These bands are assigned to deformation and translational modes of the alumina phases. A comparison of the Raman spectrum of bauxite with those of boehmite and gibbsite showed the possibility of using Raman spectroscopy for on-line processing of bauxites that contain a mixture of alumina phases.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of Raman spectra in characterizing gibbsite, bayerite, diaspore and boehmite

Ruan

Frost

Kloprogge

2001

J Raman Spectroscopy

250

172

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“…Huneke et aL, 1980;Cooney et al, 1989. A diffuse spectrum obtained from a surface area of one fragment of the intertidal deposit (AU #3066) contained two major Raman lines ofglbbsite and none ofbayerite.…”

Section: R a M A N Spectramentioning

confidence: 99%

Bayerite, Nordstrandite, Gibbsite, Brucite, and Pseudoboehmite in Discharged Caustic Waste from Campbell Island, Southwest Pacific

Rodgers

1991

Clays and clay miner.

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“…Microscope sampling and both multichannel (diode-array) and monochannel (RCA 31034A photomultiplier) detectors were employed. Intense Raman lines were observed at 3420, 3541 and 3651 cm -1 identified as v (OH)-stretching modes of the hydroxide by Huneke et al (1980). These authors also reported that the lower frequency region of the bayerite spectrum contained only a few weak, broad bands which were generally non-reproducible due to excessive fluorescence and a high background noise level.…”

Section: Physical Propertiesmentioning

confidence: 91%

Bayerite, Al(OH)₃, from Raoul Island, Kermadec Group, South Pacific

1989

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Bayerite forms a cascading, travertine-like deposit over volcanic tuffs on Raoul Island in the South Pacific where it is produced from episodic discharge of spent, caustic aluminate solutions from a hydrogen generator. Textural evidence indicates microbial activity has possibly been involved in formation of the hydroxide, as well as sodium carbonate aluminate, present in minor amounts. X-ray powder diffraction and infrared spectral studies failed to give confident identification of the bayerite, the identity being confirmed by laser Raman spectroscopy. A high quality spectrum was obtained extending from 3280 to 3680 cm−1 and from 100 to 1000 cm−1.

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The Identification of Gibbsite and Bayerite by Laser Raman Spectroscopy

Cited by 19 publications

References 0 publications

Comparison of Raman spectra in characterizing gibbsite, bayerite, diaspore and boehmite

Comparison of Raman spectra in characterizing gibbsite, bayerite, diaspore and boehmite

Bayerite, Nordstrandite, Gibbsite, Brucite, and Pseudoboehmite in Discharged Caustic Waste from Campbell Island, Southwest Pacific

Bayerite, Al(OH)₃, from Raoul Island, Kermadec Group, South Pacific

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The Identification of Gibbsite and Bayerite by Laser Raman Spectroscopy

Cited by 19 publications

References 0 publications

Comparison of Raman spectra in characterizing gibbsite, bayerite, diaspore and boehmite

Comparison of Raman spectra in characterizing gibbsite, bayerite, diaspore and boehmite

Bayerite, Nordstrandite, Gibbsite, Brucite, and Pseudoboehmite in Discharged Caustic Waste from Campbell Island, Southwest Pacific

Bayerite, Al(OH)3, from Raoul Island, Kermadec Group, South Pacific

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Bayerite, Al(OH)₃, from Raoul Island, Kermadec Group, South Pacific