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dc.contributor.authorKuva, Jukka
dc.contributor.authorSammaljärvi, J.
dc.contributor.authorParkkonen, Joni
dc.contributor.authorSiitari-Kauppi, M.
dc.contributor.authorLehtonen, M.
dc.contributor.authorTurpeinen, T.
dc.contributor.authorTimonen, Jussi
dc.contributor.authorVoutilainen, M.
dc.date.accessioned2019-02-21T07:48:14Z
dc.date.available2019-02-21T07:48:14Z
dc.date.issued2018
dc.identifier.citationKuva, J., Sammaljärvi, J., Parkkonen, J., Siitari-Kauppi, M., Lehtonen, M., Turpeinen, T., Timonen, J., & Voutilainen, M. (2018). Imaging connected porosity of crystalline rock by contrast agent-aided X-ray microtomography and scanning electron microscopy. <i>Journal of Microscopy</i>, <i>270</i>(1), 98-109. <a href="https://doi.org/10.1111/jmi.12661" target="_blank">https://doi.org/10.1111/jmi.12661</a>
dc.identifier.otherCONVID_27306147
dc.identifier.otherTUTKAID_75448
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/62911
dc.description.abstractWe set out to study connected porosity of crystalline rock using X‐ray microtomography and scanning electron microscopy with energy dispersive X‐ray spectroscopy (SEM‐EDS) with caesium chloride as a contrast agent. Caesium is an important radionuclide regarding the final deposition of nuclear waste and also forms dense phases that can be readily distinguished by X‐ray microtomography and SEM‐EDS. Six samples from two sites, Olkiluoto (Finland) and Grimsel (Switzerland), where transport properties of crystalline rock are being studied in situ, were investigated using X‐ray microtomography and SEM‐EDS. The samples were imaged with X‐ray microtomography, immersed in a saturated caesium chloride (CsCl) solution for 141, 249 and 365 days and imaged again with X‐ray microtomography. CsCl inside the samples was successfully detected with X‐ray microtomography and it had completely penetrated all six samples. SEM‐EDS elemental mapping was used to study the location of caesium in the samples in detail with quantitative mineral information. Precipitated CsCl was found in the connected pore space in Olkiluoto veined gneiss and in lesser amounts in Grimsel granodiorite. Only a very small amount of precipitated CsCl was observed in the Grimsel granodiorite samples. In Olkiluoto veined gneiss caesium was found in pinitised areas of cordierite grains. In the pinitised areas caesium was found in notable excess compared to chloride, possibly due to the combination of small pore size and negatively charged surfaces. In addition, elevated concentrations of caesium were found in kaolinite and sphalerite phases. The findings concerning the location of CsCl were congruent with X‐ray microtomography.fi
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherWiley-Blackwell Publishing Ltd.
dc.relation.ispartofseriesJournal of Microscopy
dc.rightsIn Copyright
dc.subject.otherröntgentutkimus
dc.subject.otherconnected porosity
dc.subject.othercrystalline rock
dc.subject.otherenergy dispersive X-ray spectrometry
dc.subject.otherscanning electron microscopy
dc.subject.otherX-ray microtomography
dc.titleImaging connected porosity of crystalline rock by contrast agent-aided X-ray microtomography and scanning electron microscopy
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201902111466
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2019-02-11T07:15:13Z
dc.description.reviewstatuspeerReviewed
dc.format.pagerange98-109
dc.relation.issn0022-2720
dc.relation.numberinseries1
dc.relation.volume270
dc.type.versionacceptedVersion
dc.rights.copyright© 2017 The Authors Journal of Microscopy © 2017 Royal Microscopical Society
dc.rights.accesslevelopenAccessfi
dc.subject.ysohuokoisuus
dc.subject.ysokivi
dc.subject.ysotomografia
dc.subject.ysospektrometria
dc.subject.ysoelektronimikroskopia
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p13541
jyx.subject.urihttp://www.yso.fi/onto/yso/p4467
jyx.subject.urihttp://www.yso.fi/onto/yso/p17798
jyx.subject.urihttp://www.yso.fi/onto/yso/p10177
jyx.subject.urihttp://www.yso.fi/onto/yso/p18917
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1111/jmi.12661


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