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Natural analogue approaches to prediction of long-term behaviour of Ca2UO5∙2-3H2O X-phase : case study from Tulul Al Hammam site, Jordan. / Sokol, E. V.; Kokh, S. N.; Khoury, H. N. et al.

In: Arabian Journal of Geosciences, Vol. 10, No. 23, 512, 01.12.2017.

Research output: Contribution to journal › Article › peer-review

Harvard

Sokol, EV, Kokh, SN, Khoury, HN, Seryotkin, YV, Goryainov, SV, Novikova, SA & Sokol, IA 2017, 'Natural analogue approaches to prediction of long-term behaviour of Ca2UO5∙2-3H2O X-phase: case study from Tulul Al Hammam site, Jordan', Arabian Journal of Geosciences, vol. 10, no. 23, 512. https://doi.org/10.1007/s12517-017-3305-5

APA

Sokol, E. V., Kokh, S. N., Khoury, H. N., Seryotkin, Y. V., Goryainov, S. V., Novikova, S. A., & Sokol, I. A. (2017). Natural analogue approaches to prediction of long-term behaviour of Ca2UO5∙2-3H2O X-phase: case study from Tulul Al Hammam site, Jordan. Arabian Journal of Geosciences, 10(23), [512]. https://doi.org/10.1007/s12517-017-3305-5

Vancouver

Sokol EV, Kokh SN, Khoury HN, Seryotkin YV, Goryainov SV, Novikova SA et al. Natural analogue approaches to prediction of long-term behaviour of Ca2UO5∙2-3H2O X-phase: case study from Tulul Al Hammam site, Jordan. Arabian Journal of Geosciences. 2017 Dec 1;10(23):512. doi: 10.1007/s12517-017-3305-5

Author

Sokol, E. V. ; Kokh, S. N. ; Khoury, H. N. et al. / Natural analogue approaches to prediction of long-term behaviour of Ca2UO5∙2-3H2O X-phase : case study from Tulul Al Hammam site, Jordan. In: Arabian Journal of Geosciences. 2017 ; Vol. 10, No. 23.

BibTeX

@article{ac554c285b4d4619acc16ec304e70ebd,
title = "Natural analogue approaches to prediction of long-term behaviour of Ca2UO5∙2-3H2O X-phase: case study from Tulul Al Hammam site, Jordan",
abstract = "The Tulul Al Hammam area in central Jordan is an advantageous natural analogue site to study long-term U(VI) retention in ~ 1 Ma old U-bearing combustion metamorphic marbles with clinker-like mineralogy exposed to prolonged supergene alteration for at least ~ 100 kyr. The marbles contain abundant grains of high-temperature (ca. 800–850 °C) primary double Ca-U(VI) oxides (mainly Ca3UO6 and CaUO4), which are commonly replaced by hydrated calcium uranates with various impurities (Si, Fe, Al and F). A more hydrous natural analogue of X-phase (Ca2UO5·2-3H2O) occurs as a predominant secondary U compound after primary Ca-U(VI) oxides. The phase was studied by single-crystal XRD, SEM/EDX and electron microprobe (EPMA) analyses and Raman spectroscopy. It is a non-crystalline phase with a specific finger-like microtexture consisting of thin (no wider than 1–2 μm) lamellar particles. Its Raman spectrum shows a single strong band at 706–713 cm−1, sometimes coexisting with up to three weak diffuse bands (ν ~ 390, ~ 540 and 1355–1400 cm−1). The find of the natural X-phase (Ca2UO5·2-3H2O) is evidence of its long-term stability in a natural environment. It proves explicitly that the compound Ca2UO5·nH2O is a solubility-limiting phase in aged cements. The results have implications for geological disposal of radioactive wastes.",
keywords = "Cement, Central Jordan, Long-term U retention, Natural analogue site, Radwaste management, X-phase CaUO·2-3HO, URANIUM, CD, NORTHERN JORDAN, IMMOBILIZATION, X-phase Ca2UO5 center dot 2-3H(2)O, ORIGIN, HOT PARTICLES, ZN, SPECTROSCOPY, MAQARIN AREA, CEMENT PORE WATERS",
author = "Sokol, {E. V.} and Kokh, {S. N.} and Khoury, {H. N.} and Seryotkin, {Yu V.} and Goryainov, {S. V.} and Novikova, {S. A.} and Sokol, {I. A.}",
note = "Publisher Copyright: {\textcopyright} 2017, Saudi Society for Geosciences.",
year = "2017",
month = dec,
day = "1",
doi = "10.1007/s12517-017-3305-5",
language = "English",
volume = "10",
journal = "Arabian Journal of Geosciences",
issn = "1866-7511",
publisher = "Springer-Verlag GmbH and Co. KG",
number = "23",

}

RIS

TY - JOUR

T1 - Natural analogue approaches to prediction of long-term behaviour of Ca2UO5∙2-3H2O X-phase

T2 - case study from Tulul Al Hammam site, Jordan

AU - Sokol, E. V.

AU - Kokh, S. N.

AU - Khoury, H. N.

AU - Seryotkin, Yu V.

AU - Goryainov, S. V.

AU - Novikova, S. A.

AU - Sokol, I. A.

N1 - Publisher Copyright: © 2017, Saudi Society for Geosciences.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - The Tulul Al Hammam area in central Jordan is an advantageous natural analogue site to study long-term U(VI) retention in ~ 1 Ma old U-bearing combustion metamorphic marbles with clinker-like mineralogy exposed to prolonged supergene alteration for at least ~ 100 kyr. The marbles contain abundant grains of high-temperature (ca. 800–850 °C) primary double Ca-U(VI) oxides (mainly Ca3UO6 and CaUO4), which are commonly replaced by hydrated calcium uranates with various impurities (Si, Fe, Al and F). A more hydrous natural analogue of X-phase (Ca2UO5·2-3H2O) occurs as a predominant secondary U compound after primary Ca-U(VI) oxides. The phase was studied by single-crystal XRD, SEM/EDX and electron microprobe (EPMA) analyses and Raman spectroscopy. It is a non-crystalline phase with a specific finger-like microtexture consisting of thin (no wider than 1–2 μm) lamellar particles. Its Raman spectrum shows a single strong band at 706–713 cm−1, sometimes coexisting with up to three weak diffuse bands (ν ~ 390, ~ 540 and 1355–1400 cm−1). The find of the natural X-phase (Ca2UO5·2-3H2O) is evidence of its long-term stability in a natural environment. It proves explicitly that the compound Ca2UO5·nH2O is a solubility-limiting phase in aged cements. The results have implications for geological disposal of radioactive wastes.

AB - The Tulul Al Hammam area in central Jordan is an advantageous natural analogue site to study long-term U(VI) retention in ~ 1 Ma old U-bearing combustion metamorphic marbles with clinker-like mineralogy exposed to prolonged supergene alteration for at least ~ 100 kyr. The marbles contain abundant grains of high-temperature (ca. 800–850 °C) primary double Ca-U(VI) oxides (mainly Ca3UO6 and CaUO4), which are commonly replaced by hydrated calcium uranates with various impurities (Si, Fe, Al and F). A more hydrous natural analogue of X-phase (Ca2UO5·2-3H2O) occurs as a predominant secondary U compound after primary Ca-U(VI) oxides. The phase was studied by single-crystal XRD, SEM/EDX and electron microprobe (EPMA) analyses and Raman spectroscopy. It is a non-crystalline phase with a specific finger-like microtexture consisting of thin (no wider than 1–2 μm) lamellar particles. Its Raman spectrum shows a single strong band at 706–713 cm−1, sometimes coexisting with up to three weak diffuse bands (ν ~ 390, ~ 540 and 1355–1400 cm−1). The find of the natural X-phase (Ca2UO5·2-3H2O) is evidence of its long-term stability in a natural environment. It proves explicitly that the compound Ca2UO5·nH2O is a solubility-limiting phase in aged cements. The results have implications for geological disposal of radioactive wastes.

KW - Cement

KW - Central Jordan

KW - Long-term U retention

KW - Natural analogue site

KW - Radwaste management

KW - X-phase CaUO·2-3HO

KW - URANIUM

KW - CD

KW - NORTHERN JORDAN

KW - IMMOBILIZATION

KW - X-phase Ca2UO5 center dot 2-3H(2)O

KW - ORIGIN

KW - HOT PARTICLES

KW - ZN

KW - SPECTROSCOPY

KW - MAQARIN AREA

KW - CEMENT PORE WATERS

UR - http://www.scopus.com/inward/record.url?scp=85036597692&partnerID=8YFLogxK

U2 - 10.1007/s12517-017-3305-5

DO - 10.1007/s12517-017-3305-5

M3 - Article

AN - SCOPUS:85036597692

VL - 10

JO - Arabian Journal of Geosciences

JF - Arabian Journal of Geosciences

SN - 1866-7511

IS - 23

M1 - 512

ER -

ID: 9520798