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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 |0 PUB:(DE-HGF)16 |2 PUB:(DE-HGF) |
336 | 7 | _ | |a Output Types/Journal article |2 DataCite |
336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
336 | 7 | _ | |a ARTICLE |2 BibTeX |
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336 | 7 | _ | |a article |2 DRIVER |
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. |
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588 | _ | _ | |a Dataset connected to Pubmed |
700 | 1 | _ | |a Hake, J.-F. |b 1 |u FZJ |0 P:(DE-Juel1)130461 |
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 |q 1<152 - 157 |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 |
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914 | 1 | _ | |a Nachtrag |y 2006 |
915 | _ | _ | |0 StatID:(DE-HGF)0020 |a No peer review |
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