Spontaneous Oxygen Isotope Exchange between Carbon Dioxide and Oxygen-Containing Minerals: Do the Minerals "breathe" CO2?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F16%3A00466998" target="_blank" >RIV/61388955:_____/16:00466998 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/acs.jpcc.5b11306" target="_blank" >http://dx.doi.org/10.1021/acs.jpcc.5b11306</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.5b11306" target="_blank" >10.1021/acs.jpcc.5b11306</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spontaneous Oxygen Isotope Exchange between Carbon Dioxide and Oxygen-Containing Minerals: Do the Minerals "breathe" CO2?

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Spontaneous Oxygen Isotope Exchange between Carbon Dioxide and Oxygen-Containing Minerals: Do the Minerals "breathe" CO2?

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Svazek periodika

120

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

508-516

Kód UT WoS článku

000368562200061

EID výsledku v databázi Scopus

2-s2.0-84954455811