Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 337-347 |
| Seitenumfang | 11 |
| Fachzeitschrift | Contributions to Mineralogy and Petrology |
| Jahrgang | 138 |
| Ausgabenummer | 4 |
| Publikationsstatus | Veröffentlicht - 1 Apr. 2000 |
Abstract
A review of published and newly measured densities for 40 hydrous silicate glasses indicates that the room-temperature partial molar volume of water is 12.0 ± 0.5 cm3/mol. This value holds for simple or mineral compositions as well as for complex natural glasses, from rhyolite to tephrite compositions, prepared up to 10-20 kbar pressures and containing up to 7 wt% H2O. This volume does not vary either with the molar volume of the water-free silicate phase, with its degree of polymerization or with water speciation. Over a wide range of compositions, this constant value implies that the volume change for the reaction between hydroxyl ions and molecular water is zero and that, at least in glasses, speciation does not depend on pressure. Consistent with data from Ochs and Lange (1997, 1999), systematics in volume expansion for SiO2-M2O systems (M = H, Li, Na, K) suggests that the partial molar thermal expansion coefficient of H2O is about 4 x 10-5 K-1 in silicate glasses.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Geophysik
- Erdkunde und Planetologie (insg.)
- Geochemie und Petrologie
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in: Contributions to Mineralogy and Petrology, Jahrgang 138, Nr. 4, 01.04.2000, S. 337-347.
Publikation: Beitrag in Fachzeitschrift › Übersichtsarbeit › Forschung › Peer-Review
}
TY - JOUR
T1 - Water and the density of silicate glasses
AU - Richet, Pascal
AU - Whittington, Alan
AU - Holtz, François
AU - Behrens, Harald
AU - Ohlhorst, Susanne
AU - Wilke, Max
N1 - Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2000/4/1
Y1 - 2000/4/1
N2 - A review of published and newly measured densities for 40 hydrous silicate glasses indicates that the room-temperature partial molar volume of water is 12.0 ± 0.5 cm3/mol. This value holds for simple or mineral compositions as well as for complex natural glasses, from rhyolite to tephrite compositions, prepared up to 10-20 kbar pressures and containing up to 7 wt% H2O. This volume does not vary either with the molar volume of the water-free silicate phase, with its degree of polymerization or with water speciation. Over a wide range of compositions, this constant value implies that the volume change for the reaction between hydroxyl ions and molecular water is zero and that, at least in glasses, speciation does not depend on pressure. Consistent with data from Ochs and Lange (1997, 1999), systematics in volume expansion for SiO2-M2O systems (M = H, Li, Na, K) suggests that the partial molar thermal expansion coefficient of H2O is about 4 x 10-5 K-1 in silicate glasses.
AB - A review of published and newly measured densities for 40 hydrous silicate glasses indicates that the room-temperature partial molar volume of water is 12.0 ± 0.5 cm3/mol. This value holds for simple or mineral compositions as well as for complex natural glasses, from rhyolite to tephrite compositions, prepared up to 10-20 kbar pressures and containing up to 7 wt% H2O. This volume does not vary either with the molar volume of the water-free silicate phase, with its degree of polymerization or with water speciation. Over a wide range of compositions, this constant value implies that the volume change for the reaction between hydroxyl ions and molecular water is zero and that, at least in glasses, speciation does not depend on pressure. Consistent with data from Ochs and Lange (1997, 1999), systematics in volume expansion for SiO2-M2O systems (M = H, Li, Na, K) suggests that the partial molar thermal expansion coefficient of H2O is about 4 x 10-5 K-1 in silicate glasses.
UR - http://www.scopus.com/inward/record.url?scp=0034033083&partnerID=8YFLogxK
U2 - 10.1007/s004100050567
DO - 10.1007/s004100050567
M3 - Review article
AN - SCOPUS:0034033083
VL - 138
SP - 337
EP - 347
JO - Contributions to Mineralogy and Petrology
JF - Contributions to Mineralogy and Petrology
SN - 0010-7999
IS - 4
ER -