Determination of Tetrahedral Aluminium in Mica by Infra-Red Absorption Analysis

Lyon, R. J. P.; Tuddenham, W. M.

doi:10.1038/185374a0

Cited by 28 publications

(8 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The number of tetrahedral aluminum in micas can be estimated by the shape of the absorption band in the region of 9-10/z or 1000-1110 cm -~ (Lyon and Tuddenham, 1960). Judging the shape of the absorption band in the corresponding region of the mica clay spectrum, about oneeighth of Si in the tetrahedral positions is substituted by A1, which agrees with the structural formula of the mica clay.…”

Section: Pei-lin T1ensupporting

confidence: 53%

A Purple-Colored 1M Mica Clay From Silverton, Colorado

Tien

1969

Clays and clay miner.

View full text Add to dashboard Cite

Abstract-A purple-colored clay of 1M mica polymorph in association with lead-zinc ore was collected from an abandoned mine dump near Silverton. Colorado. Electron micrographs show that the crystallites of the clay are less than 2/x in size and have poorly developed hexagonal outlines. Differential thermal and i.r. absorption analyses indicate similarity with those of muscovite. The structural formula of the 1M mica polymorph is (Ki.45 Nao.o2) (Al3.Ts Mgo.19) (Si6.90 Alt.mo) 020 (OH)4. The purple color may be related to trace amounts of manganese in the clay.

show abstract

Section: Pei-lin T1ensupporting

confidence: 53%

A Purple-Colored 1M Mica Clay From Silverton, Colorado

Tien

1969

Clays and clay miner.

View full text Add to dashboard Cite

show abstract

“…Nor is it surprising that no general relation between lattice vibrations and isomorphous substitution can be established for all silicates by combining our data with those of others (e.g. Lyon and Tuddenham, 1960;Milkey, 1960;Stubican and Roy, 1961a,b;Farmer and Russell, 1964;Flanigen et al, 1971). All that can be said definitely at present is that the vibrations within a silicate crystal are cooperative and are, therefore, affected by the replacement of one ion by another in any part of the crystal.…”

Section: Effect Of Isomorphous Substitution On Si-o Vibrationsmentioning

confidence: 79%

Effect of Swelling on the Infrared Absorption Spectrum of Montmorillonite

Lerot

1976

Clays and clay miner.

View full text Add to dashboard Cite

Abstract--The i.r. spectra of mixtures of different Na-montmorillonites were determined at several water contents between 2 and 22 g of water/g of montmorillonite. It was found that Si-O absorption is represented by four closely-spaced bands, one of which is pleochroic. The pleochroic band appeared only at higher water contents. All of these bands, excepting that with the highest wave number, shifted in frequency with increasing isomorphous substitution. None of them shifted in frequency with increasing water content.The absorption coefficient for the principal Si-O absorption decreased with increasing isomorphous substitution but increased with increasing water content. Niether isomorphous substitution nor water content appeared to have any significant effect on absorption due to O-H stretching or H-O-H bending in the interlayer water.At a critical water content for each montmorillonite, an abrupt change occurred in the absorption coefficient for the principal SilO absorption. This change was ascribed to a sudden rearrangement of the particles.

show abstract

“…As reported by Farmer (1974), the strongest transmittance IR bands observed for phyllosilicates are due to SiO 4 and M 2 or 3 ÀOH (M = Al,Mg,Fe) vibrations. The SiO 4 stretching and bending vibrations occur near 9À10 mm (~1000À1100 cm À1 ) and 20 mm (500 cm À1 ) in silicate minerals and are both influenced by substitution for Si in the tetrahedral sites (Lyon & Tuddenham, 1960;Farmer & Palmieri, 1975).…”

Section: Mid-infrared Spectra Of Phyllosilicatesmentioning

confidence: 99%

Reflectance and emission spectroscopy study of four groups of phyllosilicates: smectites, kaolinite-serpentines, chlorites and micas

Bishop¹,

Lane²,

Dyar³

et al. 2008

Clay miner.

419

372

View full text Add to dashboard Cite

Coordinated visible/near-infrared reflectance/mid-infrared reflectance and emissivity spectra of four groups of phyllosilicates were undertaken to provide insights into the differences within and among groups of smectites, kaolinite-serpentines, chlorites and micas. Identification and characterization of phyllosilicates via remote sensing on Earth and Mars can be achieved using the OH combination bands in the 2.2–2.5 μm region and the tetrahedral SiO4 vibrations from ~8.8–12 μm (~1140–830 cm–1) and ~20–25 μm (500–400 cm–1). The sharp and well resolved OH combination bands in the 2.2–2.5 μm region provide unique fingerprints for specific minerals. Al-rich phyllosilicates exhibit OH combination bands near 2.2 μm, while these bands are observed near 2.29–2.31, 2.33–2.34 μm and near 2.35–2.37 μm for Fe3+-rich, Mg-rich and Fe2+-rich phyllosilicates, respectively. When a tetrahedral substitution of Al or Fe3+ for Si occurs, the position of the Si(Al,Fe)O4 stretching mode absorption shifts. Depending on the size of the cation, the Si(Al,Fe)O4 bending mode near 500 cm–1 is split into multiple bands that may be distinguished via hyperspectral remote sensing techniques. The tetrahedral SiO4 vibrations are also influenced by the octahedral cations, such that Al-rich, Fe-rich and Mg-rich phyllosilicates can be discriminated in reflectance and emissivity spectra based on diagnostic positions of the stretching and bending bands. Differences among formation conditions for these four groups of phyllosilicates are also discussed. Hyperspectral remote sensing can be used to identify specific phyllosilicates using electronic and vibrational features and thus provide constraints on the chemistry and formation conditions of soils.

show abstract

Determination of Tetrahedral Aluminium in Mica by Infra-Red Absorption Analysis

Cited by 28 publications

References 1 publication

A Purple-Colored 1M Mica Clay From Silverton, Colorado

A Purple-Colored 1M Mica Clay From Silverton, Colorado

Effect of Swelling on the Infrared Absorption Spectrum of Montmorillonite

Reflectance and emission spectroscopy study of four groups of phyllosilicates: smectites, kaolinite-serpentines, chlorites and micas

Contact Info

Product

Resources

About