| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | Ribeiro, S.J.L | |
| dc.creator | Dexpert-Ghys, J | |
| dc.creator | Piriou, B | |
| dc.creator | Mastelaro, V.R | |
| dc.date | 2014-05-27T11:17:54Z | |
| dc.date | 2016-10-25T18:13:11Z | |
| dc.date | 2014-05-27T11:17:54Z | |
| dc.date | 2016-10-25T18:13:11Z | |
| dc.date | 1993-12-01 | |
| dc.date.accessioned | 2017-04-06T00:44:52Z | |
| dc.date.available | 2017-04-06T00:44:52Z | |
| dc.identifier | Journal of Non-Crystalline Solids, v. 159, n. 3, p. 213-221, 1993. | |
| dc.identifier | 0022-3093 | |
| dc.identifier | http://hdl.handle.net/11449/64398 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/64398 | |
| dc.identifier | 10.1016/0022-3093(93)90225-M | |
| dc.identifier | WOS:A1993LK25800003 | |
| dc.identifier | 2-s2.0-0027625227 | |
| dc.identifier | http://dx.doi.org/10.1016/0022-3093(93)90225-M | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/886259 | |
| dc.description | The Raman, IR absorption and EXAFS spectra at the Ge K-edge and Pb LIII-edge of eight lead germanate glasses, with general formula xPbO(1-x)GeO2 with x = 0.20, 0.25, 0.33, 0.40, 0.50, 0.53, 0.56 and 0.60, have been measured. The occurrence of [GeO6] units besides [GeO4] could not be deduced unambiguously from the data. The vibrational and EXAFS data agree with a progressive depolymerization of the network. Starting from all Ge atoms linked to four bridging oxygens in GeO2 (x = 0), the number of tetrahedral units with one or two non-bridging oxygens increases with x. At low content, Pb2+ ions act as modifiers in the germanate structure, but to a lesser extent than an equivalent number of alkaline ions. © 1993. | |
| dc.language | eng | |
| dc.relation | Journal of Non-Crystalline Solids | |
| dc.rights | info:eu-repo/semantics/closedAccess | |
| dc.subject | Atoms | |
| dc.subject | Ions | |
| dc.subject | Light absorption | |
| dc.subject | Molecular structure | |
| dc.subject | Oxygen | |
| dc.subject | Alkaline ions | |
| dc.subject | Bridging oxygen | |
| dc.subject | Depolymerization | |
| dc.subject | Lead germanate glasses | |
| dc.subject | Nonbridging oxygens | |
| dc.subject | Glass | |
| dc.title | Structural studies in lead germanate glasses: EXAFS and vibrational spectroscopy | |
| dc.type | Otro | |
