The Phases of Silica PDF Download
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Author: Robert Browning Sosman
Publisher:
ISBN:
Category : Silica
Languages : en
Pages : 408
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Book Description
Author: Robert Browning Sosman
Publisher:
ISBN:
Category : Silica
Languages : en
Pages : 408
Get Book Here
Book Description
Author: Robert Browning Sosman
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 872
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 388
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Book Description
Author: Peter J. Heaney
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 1501509691
Category : Science
Languages : en
Pages : 624
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Book Description
Volume 29 of Reviews in Mineralogy provides an updated silica review which focuses on the most recent developments. This book describes the crystal structures and phase transitions of silica and its stuffed derivatives; bridges the relationship between the microstructural character of real silica minerals and the behavior of silica in the geological environment; covers Quantum mechanical considerations of the Si-O bond; shows how calculations based upon first-principles theory can explain and predict silica transitions at high temperatures and pressures; covers spectroscopic analyses of silica and how they reveal vibrational behaviors in response to variations in temperature, pressure, and composition and finally details the uses of silica for industrial purposes.
Author: lawrence h. van vlack
Publisher:
ISBN:
Category :
Languages : en
Pages : 31
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Book Description
Author: Wayne Alton Dollase
Publisher:
ISBN:
Category :
Languages : en
Pages : 256
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Book Description
Author: William Primak
Publisher: Gordon & Breach Publishing Group
ISBN:
Category : Nature
Languages : en
Pages : 212
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Book Description
Author: F. Liebau
Publisher: Springer Science & Business Media
ISBN: 3642500765
Category : Science
Languages : en
Pages : 484
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Book Description
As natural minerals, silica and silicates constitute by far the largest part of the earth's crust and mantle. They are equally important as raw materials and as mass produced items. For this reason they have been the subject of scientific research by geoscientists as well as by applied scientists in cement, ceramic, glass, and other industries. Moreover, intensive fun damental research on silicates has been carried out for many years because silicates are, due to their enormous variability, ideally suited for the study of general chemical and crystallographic principles. Several excellent books on mineralogy and cement, ceramics, glass, etc. give brief, usually descriptive synopses of the structure of silicates, but do not contain detailed discussions of their structural chemistry. A number of monographs on special groups of silicates, such as the micas and clay min erals, amphiboles, feldspars, and zeolites have been published which con tain more crystal chemical information. However, no modern text has been published which is devoted to the structural chemistry of silicates as a whole. Within the last 2 decades experimental and theoretical methods have been so much improved to the extent that not only have a large number of silicate structures been accurately determined, but also a better under standing has been obtained of the correlation between the chemical composition of a silicate and its structure. Therefore, the time has been reached when a modern review of the structural chemistry of silicates has become necessary.
Author: S.E. Calvert
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 23
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Book Description
In addition to the stable silica polymorph quartz, several metastable silica phases are present in Yucca Mountain. The conversion of these phases to quartz is accompanied by volume reduction and a decrease in the aqueous silica activity, which may destabilize clinoptilolite and mordenite. The primary reaction sequence for the silica phases is from opal or glass to disordered opal-CT, followed by ordering of the opal-CT and finally by the crystallization of quartz. The ordering of opal-CT takes place in the solid state, whereas the conversion of opal-CT takes place through dissolution-reprecipitation involving the aqueous phase. It is proposed that the rate of conversion of opal-CT to quartz is controlled by diffusion of defects out of a disordered surface layer formed on the crystallizing quartz. The reaction rates are observed to be dependent on temperature, pressure, degree of supersaturation, and pH. Rate equations selected from the literature appear to be consistent with observations at Yucca Mountain.
