Počet záznamů: 1
Spontaneous Oxygen Isotope Exchange between Carbon Dioxide and Oxygen-Containing Minerals: Do the Minerals "breathe" CO2?
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SYSNO ASEP 0466998 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Spontaneous Oxygen Isotope Exchange between Carbon Dioxide and Oxygen-Containing Minerals: Do the Minerals "breathe" CO2? Tvůrce(i) Civiš, Svatopluk (UFCH-W) RID, ORCID, SAI
Bouša, Milan (UFCH-W) RID, ORCID
Zukal, Arnošt (UFCH-W) RID
Knížek, Antonín (UFCH-W) ORCID, RID, SAI
Kubelík, Petr (UFCH-W) RID, ORCID
Rojík, P. (CZ)
Nováková, Jana (UFCH-W) RID
Ferus, Martin (UFCH-W) ORCID, RIDZdroj.dok. Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 120, č. 1 (2016), s. 508-516Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Absorption spectroscopy ; Infrared spectrometers ; Oxygen Vědní obor RIV CF - Fyzikální chemie a teoretická chemie CEP LD14115 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LD13060 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA14-12010S GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000368562200061 EID SCOPUS 84954455811 DOI 10.1021/acs.jpcc.5b11306 Anotace The spontaneous isotopic exchange of oxygen atoms between dry powdered Ti16O2-containing minerals and gaseous C18O2 was studied using gas-phase high-resolution Fourier transform infrared absorption spectroscopy (FTIR) of carbon dioxide isotopologues. The absorption rovibrational spectra of all measured carbon dioxide isotopologues were assigned and then used for quantification of the time-dependent isotope exchange of oxygen atoms (16O) from the surface crystalline lattice of the solid mineral samples with (18O) oxygen atoms from gaseous C18O2. Similar to our previous studies devoted to the isotopic exchange activity of titanium dioxide, we determined that rutile, montmorillonite, siderite, calcite, and basaltic minerals also exhibit unexpectedly significant oxygen mobilities between solid and gas phases. The rate of formation of gaseous C16O2 is found to be highly dependent on the nature of the mineral sample. Our previous studies together with the results presented here suggest that such crystal-surface oxygen isotope mobilities can be explained by two mechanisms: the cluster-like structure of finely powdered materials or the existence of oxygen-deficiency sites in the structure of the surface crystal lattice. © 2015 American Chemical Society. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2017
Počet záznamů: 1