dc.date.accessioned | 2018-08-12T12:20:49Z | |
dc.date.available | 2018-08-12T12:20:49Z | |
dc.date.created | 2016-07-08T13:44:38Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | Finch, Adrian A. Friis, Henrik Maghrabi, Mufeed . Defects in sodalite-group minerals determined from X-ray-induced luminescence. Physics and chemistry of minerals. 2016, 43(7), 481-491 | |
dc.identifier.uri | http://hdl.handle.net/10852/62870 | |
dc.description.abstract | The luminescence spectra of a suite of natural sodium framework silicates including four different sodalite variants and tugtupite have been collected during X-ray irradiation as a function of temperature between 20 and 673 K. The origin of the emission bands observed in these samples is attributed to F-centres (360 nm), paramagnetic oxygen defects (400 and 450 nm), S2 − ions (620 nm) and tetrahedral Fe3+ (730 nm). Luminescence in the yellow (550 nm) is tentatively attributed to Mn2+, and red luminescence in Cr-rich pink sodalite is possibly from Cr3+ activation. Sudden reduction in luminescence intensities of emission centres was observed for all minerals in the 60–120 K range. Since it is common to all the sodalite-group minerals, we infer it is a feature of the aluminosilicate framework. Sodalite luminescence has responses from substitutions on the framework (e.g. paramagnetic oxygen defects, Fe3+) which give sodalite properties akin to other framework silicates such as feldspar and quartz. However, the presence of the sodalite cage containing anions (such as F-centres, S2 − ions) imparts additional properties akin to alkali halides. The possibility of coupling between Fe3+ and S2 − is discussed. The overall luminescence behaviour of sodalite group can be understood in terms of competition between these centre types. | en_US |
dc.language | EN | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Defects in sodalite-group minerals determined from X-ray-induced luminescence | en_US |
dc.type | Journal article | en_US |
dc.creator.author | Finch, Adrian A. | |
dc.creator.author | Friis, Henrik | |
dc.creator.author | Maghrabi, Mufeed | |
cristin.unitcode | 185,28,8,3 | |
cristin.unitname | Mineralogisk forskningsgruppe | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 1366976 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physics and chemistry of minerals&rft.volume=43&rft.spage=481&rft.date=2016 | |
dc.identifier.jtitle | Physics and chemistry of minerals | |
dc.identifier.volume | 43 | |
dc.identifier.issue | 7 | |
dc.identifier.startpage | 481 | |
dc.identifier.endpage | 491 | |
dc.identifier.doi | http://dx.doi.org/10.1007/s00269-016-0816-7 | |
dc.identifier.urn | URN:NBN:no-65440 | |
dc.type.document | Tidsskriftartikkel | en_US |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0342-1791 | |
dc.identifier.fulltext | Fulltext https://www.duo.uio.no/bitstream/handle/10852/62870/1/Finch%2Bet%2Bal%2B2016_Sodalite%2BXEOL.pdf | |
dc.type.version | PublishedVersion | |