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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1107/S1600576718003977
|2 doi
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|a pubmed25n0951.xml
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|a (DE-627)NLM285404636
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|a (NLM)29896058
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Wang, Weiwei
|e verfasserin
|4 aut
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|a Investigation of high-pressure planetary ices by cryo-recovery. II. High-pressure apparatus, examples and a new high-pressure phase of MgSO4·5H2O
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Revised 18.03.2024
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|a published: Electronic-eCollection
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|a Citation Status PubMed-not-MEDLINE
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|a An apparatus is described for the compression of samples to ∼2 GPa at temperatures from 80 to 300 K, rapid chilling to 80 K whilst under load and subsequent recovery into liquid nitro-gen after the load is released. In this way, a variety of quenchable high-pressure phases of many materials may be preserved for examination outside the high-pressure sample environment, with the principal benefit being the ability to obtain high-resolution powder diffraction data for phase identification and structure solution. The use of this apparatus, in combination with a newly developed cold-loadable low-temperature stage for X-ray powder diffraction (the PheniX-FL), is illustrated using ice VI (a high-pressure polymorph of ordinary water ice that is thermodynamically stable only above ∼0.6 GPa) as an example. A second example using synthetic epsomite (MgSO4·7H2O) reveals that, at ∼1.6 GPa and 293 K, it undergoes incongruent melting to form MgSO4·5H2O plus brine, contributing to a long-standing debate on the nature of the high-pressure behaviour of this and similar highly hydrated materials. The crystal structure of this new high-pressure polymorph of MgSO4·5H2O has been determined at 85 K in space group Pna21 from the X-ray powder diffraction pattern of a sample recovered into liquid nitro-gen and is found to differ from that of the known ambient-pressure phase of MgSO4·5H2O (pentahydrite, space group ), consisting of corner-sharing MgO6-SO4 ion pairs rather than infinite corner-sharing chains
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|a Journal Article
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|a cryo-recovery
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|a epsomite
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|a high pressure
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|a magnesium sulfate pentahydrate
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|a planetary ices
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|a Fortes, A Dominic
|e verfasserin
|4 aut
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|a Dobson, David P
|e verfasserin
|4 aut
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| 700 |
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|a Howard, Christopher M
|e verfasserin
|4 aut
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| 700 |
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|a Bowles, John
|e verfasserin
|4 aut
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| 700 |
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|a Hughes, Neil J
|e verfasserin
|4 aut
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| 700 |
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|a Wood, Ian G
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of applied crystallography
|d 1998
|g 51(2018), Pt 3 vom: 01. Juni, Seite 692-705
|w (DE-627)NLM098121561
|x 0021-8898
|7 nnns
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| 773 |
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|g volume:51
|g year:2018
|g number:Pt 3
|g day:01
|g month:06
|g pages:692-705
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|u http://dx.doi.org/10.1107/S1600576718003977
|3 Volltext
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|h 692-705
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