Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/4834
DC Field | Value | Language |
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dc.contributor.authorall | Iezzi, G.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
dc.contributor.authorall | Liu, Z. | en |
dc.contributor.authorall | Della Ventura, G. | en |
dc.date.accessioned | 2008-12-16T07:26:30Z | en |
dc.date.available | 2008-12-16T07:26:30Z | en |
dc.date.issued | 2009 | - |
dc.identifier.uri | http://hdl.handle.net/2122/4834 | en |
dc.description.abstract | high-pressure behavior of three synthetic amphiboles crystallized with space group P21/m at room conditions in the system Li2O–Na2O–MgO–SiO2–H2O has been studied by in situ synchrotron infrared absorption spectroscopy. The amphiboles have compositions ANa B(NaxLi1 ¡ xMg1) CMg5 Si8 O22(OH)2 with x = 0.6, 0.2 and 0.0, respectively. The high-P experiments up to 32 GPa were carried out on the U2A beamline at Brookhaven National Laboratory (NY, USA) using a diamond anvil cell under non-hydrostatic or quasi-hydrostatic conditions. The two most intense absorption bands in the OH-stretching infrared spectra can be assigned to two non-equivalent O–H dipoles in the P21/m structure, bonded to the same local environment M1M3Mg3–OH–ANa, and pointing toward two diVerently kinked tetrahedral rings. In all samples these bands progressively merge to give a unique symmetrical absorption with increasing pressure, suggesting a change in symmetry from P21/m to C2/m. The pressure at which the transition occurs appears to be linearly correlated to the aggregate B-site dimension. The infrared spectra collected for amphibole B(Na0.2Li0.8Mg1) in the frequency range 50 to 1,400 cm¡1 also show a series of changes with increasing pressure. The data reported here support the inference of Iezzi et al. (Am Miner 91:479–482, 2006a) regarding a new high-pressure C2/m amphibole polymorph characterized by two equivalent and kinked double-chains, stable at very high-pressure. | en |
dc.language.iso | English | en_US |
dc.publisher.name | Springer | en_US |
dc.relation.ispartof | Physics and Chemistry of Minerals | en_US |
dc.relation.ispartofseries | /36 (2009) | en_US |
dc.relation.isversionof | http://www.springerlink.com/content/100449/?p=9ed04048f0984ce0b83071cf68db968a&pi=39 | en_US |
dc.subject | High-pressure | en |
dc.subject | B-site dimension | en |
dc.title | Synthetic ANaB(NaxLi1 ¡ xMg1)CMg5Si8O22(OH)2 (with x = 0.6, 0.2 and 0) P21/m amphiboles at high pressure: a synchrotron infrared study | en_US |
dc.type | article | en |
dc.description.status | Published | en_US |
dc.type.QualityControl | Peer-reviewed | en_US |
dc.description.pagenumber | 343–354 | en_US |
dc.subject.INGV | 04. Solid Earth::04.01. Earth Interior::04.01.04. Mineral physics and properties of rocks | en |
dc.identifier.doi | 10.1007/s00269-008-0282-y | en_US |
dc.description.obiettivoSpecifico | 2IT. Laboratori analitici e sperimentali | en_US |
dc.description.journalType | JCR Journal | en_US |
dc.description.fulltext | reserved | en |
dc.contributor.author | Iezzi, G. | - |
dc.contributor.author | Liu, Z. | - |
dc.contributor.author | Della Ventura, G. | - |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en_US |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Università degli studi G. D'annunzio, Chieti Pescara, Italy | - |
crisitem.author.dept | Dipartimento di Scienze Geologiche Università Roma Tre | - |
crisitem.author.orcid | 0000-0001-6277-961X | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
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