Titre du document / Document title
Kegelite : infrared spectroscopy and a structural hypothesis
Auteur(s) / Author(s)
BRAITHWAITE R. S. W. ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
Univ. Manchester inst. sci. technology, chemistry dep., Manchester M60 1QD, ROYAUME-UNI
Résumé / Abstract
The infrared spectrum of kegelite has been measured and is discussed. The infrared spectra of 1:1 molar mixtures of leadhillite with pyrophyllite or with muscovite resemble the spectrum of kegelite, the chemical formula of which is a 1:1 stoichiometric sum of those of pyrophyllite and of the leadhillite polymorphs. Kegelite is not a physical mixture of these species, but its structure may be an interlayering of phyllosilicate and leadhillite-like structures within the unit cell. The unit cell parameters of pyrophyllite-1 Tc and the leadhillite polymorphs are compatible with each other and can be combined to give a cell with parameters close to those of the kegelite cell. A structural model for kegelite on these bases is suggested, which is also consistent with its thermal analysis. The formula of kegelite can be written as Pb
8(SO
4)
2(CO
3)
4(OH)
4(AlOH)
4(SiO
10)
2Revue / Journal Title
Mineralogical Magazine
ISSN 0026-461X
CODEN MNLMBB
Source / Source
1991, vol. 55, n
o1, pp. 127-134 [8 page(s) (article)] (1 p.)
Langue / Language
Anglais
Editeur / Publisher
Mineralogical Society, London, ROYAUME-UNI
(1969)
(Revue)
Mots-clés anglais / English Keywords
Unit cell ;
Pyrophyllite ;
Unit cell ;
Crystalline structure ;
Crystal structure ;
Phyllosilicate ;
Sheet silicates ;
Pyrophyllite ;
Infrared spectrum ;
Infrared spectra ;
Unit cell ;
Pyrophyllite ;
Crystalline structure ;
Crystal structure ;
Phyllosilicate ;
Sheet silicates ;
Muscovite ;
Infrared spectrum ;
Infrared spectra ;
Crystalline structure ;
Crystal structure ;
Phyllosilicate ;
Sheet silicates ;
Muscovite ;
Infrared spectrum ;
Infrared spectra ;
Unit cell ;
Crystalline structure ;
Crystal structure ;
Phyllosilicate ;
Sheet silicates ;
Muscovite ;
Infrared spectrum ;
Infrared spectra ;
Mots-clés français / French Keywords
Kegelite ;
Maille élémentaire ;
Pyrophyllite ;
Kegelite ;
Maille élémentaire ;
Structure cristalline ;
Phyllosilicate ;
Pyrophyllite ;
Spectre IR ;
Kegelite ;
Maille élémentaire ;
Pyrophyllite ;
Structure cristalline ;
Phyllosilicate ;
Muscovite ;
Spectre IR ;
Structure cristalline ;
Phyllosilicate ;
Muscovite ;
Spectre IR ;
Formule structurale ;
Kegelite ;
Maille élémentaire ;
Structure cristalline ;
Phyllosilicate ;
Muscovite ;
Spectre IR ;
Mots-clés espagnols / Spanish Keywords
Celdilla cristalina ;
Pirofilita ;
Celdilla cristalina ;
Estructura cristalina ;
Filosilicato ;
Pirofilita ;
Espectro IR ;
Celdilla cristalina ;
Pirofilita ;
Estructura cristalina ;
Filosilicato ;
Muscovita ;
Espectro IR ;
Estructura cristalina ;
Filosilicato ;
Muscovita ;
Espectro IR ;
Celdilla cristalina ;
Estructura cristalina ;
Filosilicato ;
Muscovita ;
Espectro IR ;
Localisation / Location
INIST-CNRS, Cote INIST : 3052,
Nº notice refdoc (ud4) : 19600335
