001     56074
005     20180211174935.0
024 7 _ |a pmid:15017085
|2 pmid
024 7 _ |a 10.1179/174892406X177266
|2 DOI
037 _ _ |a PreJuSER-56074
041 _ _ |a eng
082 _ _ |a 620
100 1 _ |a Birnbaum, U.
|b 0
|u FZJ
|0 P:(DE-Juel1)VDB5279
245 _ _ |a The hydrogen economy: technology, logistics and economics
260 _ _ |a London
|b Maney
|c 2006
300 _ _ |a 152 - 157
336 7 _ |a Journal Article
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336 7 _ |a Output Types/Journal article
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336 7 _ |a Journal Article
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336 7 _ |a ARTICLE
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336 7 _ |a JOURNAL_ARTICLE
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336 7 _ |a article
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440 _ 0 |a Energy Materials: Materials Science and Engineering for Energy Systems
|x 1748-9237
|0 16761
|y 3
|v 1
500 _ _ |a Record converted from VDB: 12.11.2012
520 _ _ |a The synthetic vanadinites (Pb(x)Ca(10-x))(VO4)6F2delta, 1 < x < 9, adopt a P6(3)/m apatite structure with 9.7590 (1) < or = a < or = 10.1179 (1) A and 7.0434 (3) < or = c < or = 7.4021 (1) A. The partitioning of calcium and lead over the AI(4f) and AII(6h) positions is nonstoichiometric with lead preferentially entering the larger AII site. High-resolution electron microscopy showed that samples annealed for 10 h at 1073 K are in disequilibrium with calcium- and lead-rich microdomains co-existing at unit-cell scales. For (Pb5Ca5)(VO4)6F2delta, sintering in excess of 2 weeks is required for the metals to order macroscopically. As annealing progresses, c/a, the partitioning coefficient kPb(AI/AII) and the AIO6 metaprism twist angle (phi) adjust cooperatively to enlarge the apatite channel, and thereby accommodate higher lead content. These results demonstrate that phi is a sensitive measure of disequilibrium and a useful device for monitoring changes in apatite topology as a function of composition.
536 _ _ |a Nachhaltige Entwicklung und Technik
|c P26
|2 G:(DE-HGF)
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588 _ _ |a Dataset connected to Pubmed
700 1 _ |a Hake, J.-F.
|b 1
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700 1 _ |a Linssen, J.
|b 2
|u FZJ
|0 P:(DE-Juel1)130470
700 1 _ |a Walbeck, M.
|b 3
|u FZJ
|0 P:(DE-Juel1)VDB1907
773 _ _ |a 10.1179/174892406X177266
|g Vol. 1, p. 152 - 157
|p 152 - 157
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|0 PERI:(DE-600)2391528-6
|t Energy materials
|v 1
|y 2006
|x 1748-9237
856 7 _ |u http://dx.doi.org/10.1179/174892406X177266
909 C O |o oai:juser.fz-juelich.de:56074
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913 1 _ |k P26
|v Nachhaltige Entwicklung und Technik
|l Nachhaltige Entwicklung und Technik
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914 1 _ |a Nachtrag
|y 2006
915 _ _ |0 StatID:(DE-HGF)0020
|a No peer review
920 1 _ |k STE
|l Programmgruppe Systemforschung und Technologische Entwicklung
|d 31.12.2006
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980 _ _ |a UNRESTRICTED
981 _ _ |a I:(DE-Juel1)IEK-STE-20101013
981 _ _ |a I:(DE-Juel1)VDB815


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