Zobrazeno 1 - 9 of 9 pro vyhledávání: '"Ann Graeme-Barber"'
1
Metamictization of zircon: Raman spectroscopic study
Autor: Ming Zhang, Philippe Daniel, Hugues Leroux, Andrew M Clark, Ian Farnan, Ekhard K. H. Salje, Ann Graeme-Barber, Rodney C. Ewing
Publikováno v: Journal of Physics: Condensed Matter. 12:1915-1925
Raman spectroscopy of radiation-damaged natural zircon samples shows increased line broadening and shifts of phonon frequencies with increasing radiation dose. Stretching and bending frequencies of SiO4 tetrahedra soften dramatically with increasing
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6a962791761d9771a7115dc873aab5c9
https://doi.org/10.1088/0953-8984/12/8/333
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3
Calibration of excess thermodynamic properties and elastic constant variations associated with the alpha <-->beta phase transition in quartz
Autor: B. Wruck, Michael A. Carpenter, Martin T. Dove, Ann Graeme-Barber, Kevin S. Knight, Ekhard K. H. Salje
Publikováno v: American Mineralogist. 83:2-22
Spontaneous strains for the a ↔ b transition in quartz were determined from lattice parameter data collected by X-ray powder diffraction and neutron powder diffraction over the temperature range ;5‐1340 K. These appear to be compatible with previ
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::56fc2b27762e833b94ff3b0c6765f785
https://doi.org/10.2138/am-1998-1-201
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4
Exsolution and Al-Si disorder in alkali feldspars; their analysis by infrared spectroscopy
Autor: Michael A. Carpenter, S.J.B. Reed, Ian Parsons, Ekhard K. H. Salje, Ming Zhang, H. Kroll, Ann Graeme-Barber
Publikováno v: American Mineralogist. 82:849-857
An experimental method for the determination of Ab-Or exsolution and Al-Si ordering in alkali feldspar is described. Powder infrared spectroscopy was used to measure spectra in the spectral range between 50 and 1500 cm 21 using about 5 mg of sample m
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b049c41b021f9e0fbd7e58e521b58308
https://doi.org/10.2138/am-1997-9-1002
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5
Lattice parameters, spontaneous strain and phase transitions in Pb3(PO4)2
Autor: Ulli Bismayer, Ekhard K. H. Salje, Ann Graeme-Barber, Michael A. Carpenter
Publikováno v: Acta Crystallographica Section B Structural Science. 49:387-392
The temperature evolution of the lattice parameters of lead phosphate, Pb 3 (PO 4 ) 2 , indicates three lattice instabilities with anomalies near 530, 453 and ca 430 K. Only the phase transition at 453 K is ferroelastic with a spontaneous strain e=(e
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::155a2415d1be569d21c9d75ba203b1bc
https://doi.org/10.1107/s0108768192008127
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6
Experimental test of rate equations: time evolution of Al,Si ordering in anorthite CaAl2Si2O8
Autor: Michael A. Carpenter, Ann Graeme-Barber, B. Wruck, Ekhard K. H. Salje
Publikováno v: Journal of Physics: Condensed Matter. 5:2961-2968
The kinetic and equilibrium behaviour of the order parameter, Qod, of Al,Si ordering in anorthite has been compared with the results of current rate theories (Ising-type Glauber, Ising-type Kawasaki and Landau-type rate equations). Although all rate
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::540f4cf259ee38dc06fc42a065380f7a
https://doi.org/10.1088/0953-8984/5/18/018
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7
Kinetic rate laws derived from order parameter theory IV: Kinetics of Al,Si disordering in Na-feldspars
Autor: Ekhard K. H. Salje, B. Wruck, Ann Graeme-Barber
Publikováno v: Physics and Chemistry of Minerals. 17
The kinetic rate laws of Al-Si disordering under dry conditions (T = 1353K, 1253 K, 1223 K, 1183 K) and in the presence of water (p = 1 kbar, T = 1023 K, 1073 K, 1103 K) were studied both experimentally and theoretically. A gradual change of the degr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a83175df05c9ece44f272e7e07628176
https://doi.org/10.1007/bf00202240
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8
Thermodynamics of plagioclase III: Spontaneous strain at the $$I\overline 1 - P\overline 1$$ phase transition in Ca-rich plagioclase
Autor: Ann Graeme-Barber, Ekhard K. H. Salje, Simon A. T. Redfern
Publikováno v: Physics and Chemistry of Minerals. 16
The lattice parameters of anorthites An98Ab2 and An100 have been measured from 22 to 1100 K. The spontaneous strain arising from the $$I\overline 1 - P\overline 1$$ displacive transition in An98 follows second order Landau behaviour. The spontaneous
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5d272926336673668d47743e2da99c6a
https://doi.org/10.1007/bf00203199
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9
Phonon spectra of alkali feldspars: Phase transitions and solid solutions
Autor: Ann Graeme-Barber, B. Wruck, Michael A. Carpenter, Ming Zhang, Ekhard K. H. Salje
Publikováno v: ResearcherID
The phonon spectra ofIR-active vibrations in alkali feldspars have been systematically investigated in the spectral range 50-2000 cm-I at temperatures between 20 and 900 K. Samples with high degrees of Al-Si order display IR absorption line profiles
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82e3ac25de262fd02fb18e1b52dcb481
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:A1996TW23300012&KeyUID=WOS:A1996TW23300012
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