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http://hdl.handle.net/2122/6403
DC Field | Value | Language |
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dc.contributor.authorall | Del Gaudio, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Behrens, H.; Institut für Mineralogie, Leibniz Universität Hannover | en |
dc.date.accessioned | 2010-12-16T11:13:27Z | en |
dc.date.available | 2010-12-16T11:13:27Z | en |
dc.date.issued | 2009-07-23 | en |
dc.identifier.uri | http://hdl.handle.net/2122/6403 | en |
dc.description.abstract | The effect of pressure on melt viscosity was investigated for five compositions along the join An(CaAl2Si2O8)–Di(CaMgSi2O6) and four alkali silicates containing lithium, sodium, and potassium in constant ratio of ∼ 1:1:1, but alkali-silica ratios are varying. The experiments were performed in an internally heated gas pressure vessel at pressures from 50 to 400 MPa in the viscosity range from 108 to 1011.5 Pa⋅s using parallel plate viscometry. The polymerized An composition shows a negative pressure dependence of viscosity while the other, more depolymerized compositions of the join An–Di have neutral to positive pressure coefficients. The alkali silicates display neutral to slightly positive pressure coefficients for melt viscosity. These findings in the high viscosity range of 108–1011 Pa⋅s, where pressure appears to be more efficient than in low viscous melts at high temperature, are consistent with previous results on the viscosity of polymerized to depolymerized melts in the system NaAlSi3O8–CaMgSi2O6 by Behrens and Schulze [ H. Behrens and F. Schulze, Am. Mineral. 88, 1351 (2003) ]. Thus we confirm that the sign of the pressure coefficient for viscosity is mainly related to the degree of melt polymerization in silicate and aluminosilicate melts. | en |
dc.description.sponsorship | DFG Grant n.°BE1720/9 | en |
dc.language.iso | English | en |
dc.publisher.name | American Institute of Physics | en |
dc.relation.ispartof | The Journal of Chemical Physics | en |
dc.relation.ispartofseries | 4/131(2009) | en |
dc.subject | viscosity | en |
dc.subject | polymerisation | en |
dc.subject | anorthite | en |
dc.subject | diopside | en |
dc.title | An experimental study on the pressure dependence of viscosity in silicate melts | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | 044504-14 | en |
dc.identifier.URL | http://jcp.aip.org/resource/1/jcpsa6/v131/i4/p044504_s1?isAuthorized=no | en |
dc.subject.INGV | 04. Solid Earth::04.08. Volcanology::04.08.99. General or miscellaneous | en |
dc.identifier.doi | 10.1063/1.3169455 | en |
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dc.description.obiettivoSpecifico | 2.3. TTC - Laboratori di chimica e fisica delle rocce | en |
dc.description.journalType | JCR Journal | en |
dc.description.fulltext | open | en |
dc.contributor.author | Del Gaudio, P. | en |
dc.contributor.author | Behrens, H. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.department | Institut für Mineralogie, Leibniz Universität Hannover | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | - |
crisitem.author.dept | Liebniz Universitat Hannover | - |
crisitem.author.orcid | 0000-0002-0977-1237 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
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Del Gaudio - viscosity P effect.pdf | Article | 639.49 kB | Adobe PDF | View/Open |
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