|
|
|
|
| LEADER |
01000naa a22002652 4500 |
| 001 |
NLM212216791 |
| 003 |
DE-627 |
| 005 |
20231224015114.0 |
| 007 |
cr uuu---uuuuu |
| 008 |
231224s2011 xx |||||o 00| ||eng c |
| 024 |
7 |
|
|a 10.1107/S0909049511036326
|2 doi
|
| 028 |
5 |
2 |
|a pubmed24n0707.xml
|
| 035 |
|
|
|a (DE-627)NLM212216791
|
| 035 |
|
|
|a (NLM)21997913
|
| 040 |
|
|
|a DE-627
|b ger
|c DE-627
|e rakwb
|
| 041 |
|
|
|a eng
|
| 100 |
1 |
|
|a Wang, Ling
|e verfasserin
|4 aut
|
| 245 |
1 |
0 |
|a Titanium local structure in tektite probed by X-ray absorption fine structure spectroscopy
|
| 264 |
|
1 |
|c 2011
|
| 336 |
|
|
|a Text
|b txt
|2 rdacontent
|
| 337 |
|
|
|a ƒaComputermedien
|b c
|2 rdamedia
|
| 338 |
|
|
|a ƒa Online-Ressource
|b cr
|2 rdacarrier
|
| 500 |
|
|
|a Date Completed 08.02.2012
|
| 500 |
|
|
|a Date Revised 14.10.2011
|
| 500 |
|
|
|a published: Print-Electronic
|
| 500 |
|
|
|a Citation Status PubMed-not-MEDLINE
|
| 520 |
|
|
|a The local structure of titanium in tektites from six strewn fields was studied by Ti K-edge X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) in order to provide quantitative data on Ti-O distance and Ti coordination number. The titanium in tektites possessed different coordination environment types. XANES spectra patterns revealed resemblance to high-temperature TiO(2)-SiO(2) glass and TiO(2) anatase. All samples showed that the valence of Ti is 4+. Based on the Ti-O distances, coordination numbers and radial distribution function determined by EXAFS analyses, the tektites were classified into three types: type I, Ti occupies a four-coordinated tetrahedral site with Ti-O distances of 1.84-1.79 Å; type II, Ti occupies a five-coordinated trigonal bipyramidal or tetragonal pyramidal site with Ti-O distances of 1.92-1.89 Å; type III, Ti occupies a six-coordinated octahedral site with Ti-O distances of 2.00-1.96 Å. Although Ti occupies the TiO(6) octahedral site in most titanium minerals under ambient conditions, some tektites have four- and five-coordinated Ti. This study indicated that the local structure of Ti might change in impact events and the following stages
|
| 650 |
|
4 |
|a Journal Article
|
| 700 |
1 |
|
|a Yoshiasa, Akira
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Okube, Maki
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Takeda, Takashi
|e verfasserin
|4 aut
|
| 773 |
0 |
8 |
|i Enthalten in
|t Journal of synchrotron radiation
|d 1994
|g 18(2011), Pt 6 vom: 04. Nov., Seite 885-90
|w (DE-627)NLM09824129X
|x 1600-5775
|7 nnns
|
| 773 |
1 |
8 |
|g volume:18
|g year:2011
|g number:Pt 6
|g day:04
|g month:11
|g pages:885-90
|
| 856 |
4 |
0 |
|u http://dx.doi.org/10.1107/S0909049511036326
|3 Volltext
|
| 912 |
|
|
|a GBV_USEFLAG_A
|
| 912 |
|
|
|a SYSFLAG_A
|
| 912 |
|
|
|a GBV_NLM
|
| 912 |
|
|
|a GBV_ILN_40
|
| 912 |
|
|
|a GBV_ILN_350
|
| 912 |
|
|
|a GBV_ILN_2005
|
| 951 |
|
|
|a AR
|
| 952 |
|
|
|d 18
|j 2011
|e Pt 6
|b 04
|c 11
|h 885-90
|