Journal ArticleDOI
Polymorphism of silica
TLDR
In this article, it is shown that although cristobalite can be produced from pure quartz by heating it is not possible to produce tridymite in this fashion; a flux or mineralizer is required for tridymyite formation and even in this case cristsobalite is produced before any tridye is observed.Abstract:
A study of the stability relations of pure silica phases is described. It is shown that although cristobalite can be produced from pure quartz by heating it is not possible to produce tridymite in this fashion; a flux or mineralizer is required for tridymite formation and even in this case cristobalite is produced before any tridymite is observed. Thus it is concluded that the stability relations for the silica minerals proposed by Fenner are incorrect and that tridymite is not a stable phase in the pure silica system.read more
Citations
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Glass: The Nanotechnology Connection
TL;DR: In this paper, the authors review fundamental aspects of these connections with the intent of drawing attention to their role in both contemporary and future glass science and engineering and argue that many of the most useful and interesting behaviors of glass are born at the nanoscale, even when we initially do not notice it.
Journal ArticleDOI
Crystals and phase transitions in protohistoric glass materials
TL;DR: In this article, the crystalline material present in representative Bronze Age glasses and glassy materials from Northern and Central Italy are discussed based on textural, crystallographic, and chemical data.
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Microstructural Evolution on Firing Soda–Lime–Silica Glass Fluxed Whitewares
TL;DR: In this paper, the microstructural evolution of porcelains containing 0-25 wt% soda-lime-silica (SLS) waste glass was investigated, with a range of temperatures from 600° to 1400°C.
Journal ArticleDOI
Crystalline-like ordering in melt-quenched network glasses?
TL;DR: In this article, the authors present a rational discussion of the present perception of the relationship between the structures of vitreous and crystalline phases and that of the melt from which they are formed, and conclude that, whilst there are no unambiguous data that uniquely establish the presence of crystalline-like ordering in glasses, there is strong circumstantial evidence for its existence.
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Chemical, mineralogical and ceramic properties of kaolinitic materials from the Tresnuraghes mining district (Western Sardinia, Italy)
TL;DR: In this article, three main kaolinitic deposits, located in the Patalza, Salamura and Su Fongarazzu areas, respectively, were investigated in order to assess their potential in the ceramic industry.
References
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Book
An Introduction to the Rock-Forming Minerals
TL;DR: In this article, the authors define di-and ring silicates: olivine group humite group zircon sphene (titanite) garnet group, vesuvianite sillimanite, mullite, andalusite, kyanite topaz staurolite, chloritoid epidote group lawsonite, pumpellyite melilite group beryl, cordierite, tourmaline axinite.
Journal ArticleDOI
Oxygen mobility in silicon dioxide and silicate glasses: a review
TL;DR: In this article, the authors reviewed the literature concerning oxygen permeation and diffusion through amorphous and crystalline silicon dioxide, and silicate glasses, and collected data for diffusion coefficients to facilitate the assessment of probable dominant oxygen transport mechanisms, and associated rates.
Journal ArticleDOI
Network properties of crystalline polymorphs of silica
Carol S. Marians,Linn W. Hobbs +1 more
TL;DR: In this paper, a method for the study of structure in tetrahedrally coordinated networks is presented, where the local structure of the network under consideration is studied, giving a definition of that part of the structure which ought to be considered the local environment of a particular tetrahedral in the network.