A study of natural metamict yttrium niobate as analogue of actinide ceramic waste form

C. Qiuxiang; A.I. Isakov; L. Xiaodong; S.V. Krivovichev; B.E. Burakov

doi:10.1557/opl.2014.660

A study of natural metamict yttrium niobate as analogue of actinide ceramic waste form

C. Qiuxiang, A.I. Isakov, L. Xiaodong, S.V. Krivovichev, B.E. Burakov

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Scopus citations

Abstract

© 2014 Materials Research Society. Natural metamict mineral found as large (1-3 cm in size) homogeneous grains (as assumed, former single crystals), was investigated by X-ray powder diffraction (pXRD), high-temperature pXRD, scanning electron microscopy (SEM) and electron microprobe analysis (EMPA). The average chemical composition obtained by EMPA is (wt. %): Nb2O5 - 42.6; Ta2O5 - 4.4; TiO2 - 9.2; UO3 - 4.4; ThO2 - 1.0; MnO - 1.3; FeO - 19.4; Y2O3 - 16.6. The untreated (original) sample is X-ray amorphous. The sample remained amorphous after annealing at 400 °C for 1 hour. The sample became almost fully crystalline after annealing at 700 °C for 1 hour with an X-ray diffraction pattern similar to that of Fe-columbite (ICCD: 01 074-7356). Further annealing at 1000 °C and higher temperatures caused changes in the phase composition of the sample. It was proposed that under self-irradiation a single-phase U-Th-beari

Original language	English
Title of host publication	Symposium NW – Scientific Basis for Nuclear Waste Management XXXVII
Publisher	Cambridge University Press
Pages	313-318
Number of pages	6
Volume	1665
ISBN (Print)	9781605116426
DOIs	https://doi.org/10.1557/opl.2014.660
State	Published - 1 Jul 2014

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title = "A study of natural metamict yttrium niobate as analogue of actinide ceramic waste form",

abstract = "{\textcopyright} 2014 Materials Research Society. Natural metamict mineral found as large (1-3 cm in size) homogeneous grains (as assumed, former single crystals), was investigated by X-ray powder diffraction (pXRD), high-temperature pXRD, scanning electron microscopy (SEM) and electron microprobe analysis (EMPA). The average chemical composition obtained by EMPA is (wt. %): Nb2O5 - 42.6; Ta2O5 - 4.4; TiO2 - 9.2; UO3 - 4.4; ThO2 - 1.0; MnO - 1.3; FeO - 19.4; Y2O3 - 16.6. The untreated (original) sample is X-ray amorphous. The sample remained amorphous after annealing at 400 °C for 1 hour. The sample became almost fully crystalline after annealing at 700 °C for 1 hour with an X-ray diffraction pattern similar to that of Fe-columbite (ICCD: 01 074-7356). Further annealing at 1000 °C and higher temperatures caused changes in the phase composition of the sample. It was proposed that under self-irradiation a single-phase U-Th-beari",

author = "C. Qiuxiang and A.I. Isakov and L. Xiaodong and S.V. Krivovichev and B.E. Burakov",

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doi = "10.1557/opl.2014.660",

language = "English",

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A study of natural metamict yttrium niobate as analogue of actinide ceramic waste form. / Qiuxiang, C.; Isakov, A.I.; Xiaodong, L.; Krivovichev, S.V.; Burakov, B.E.

Symposium NW – Scientific Basis for Nuclear Waste Management XXXVII . Vol. 1665 Cambridge University Press, 2014. p. 313-318.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - A study of natural metamict yttrium niobate as analogue of actinide ceramic waste form

AU - Qiuxiang, C.

AU - Isakov, A.I.

AU - Xiaodong, L.

AU - Krivovichev, S.V.

AU - Burakov, B.E.

PY - 2014/7/1

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N2 - © 2014 Materials Research Society. Natural metamict mineral found as large (1-3 cm in size) homogeneous grains (as assumed, former single crystals), was investigated by X-ray powder diffraction (pXRD), high-temperature pXRD, scanning electron microscopy (SEM) and electron microprobe analysis (EMPA). The average chemical composition obtained by EMPA is (wt. %): Nb2O5 - 42.6; Ta2O5 - 4.4; TiO2 - 9.2; UO3 - 4.4; ThO2 - 1.0; MnO - 1.3; FeO - 19.4; Y2O3 - 16.6. The untreated (original) sample is X-ray amorphous. The sample remained amorphous after annealing at 400 °C for 1 hour. The sample became almost fully crystalline after annealing at 700 °C for 1 hour with an X-ray diffraction pattern similar to that of Fe-columbite (ICCD: 01 074-7356). Further annealing at 1000 °C and higher temperatures caused changes in the phase composition of the sample. It was proposed that under self-irradiation a single-phase U-Th-beari

AB - © 2014 Materials Research Society. Natural metamict mineral found as large (1-3 cm in size) homogeneous grains (as assumed, former single crystals), was investigated by X-ray powder diffraction (pXRD), high-temperature pXRD, scanning electron microscopy (SEM) and electron microprobe analysis (EMPA). The average chemical composition obtained by EMPA is (wt. %): Nb2O5 - 42.6; Ta2O5 - 4.4; TiO2 - 9.2; UO3 - 4.4; ThO2 - 1.0; MnO - 1.3; FeO - 19.4; Y2O3 - 16.6. The untreated (original) sample is X-ray amorphous. The sample remained amorphous after annealing at 400 °C for 1 hour. The sample became almost fully crystalline after annealing at 700 °C for 1 hour with an X-ray diffraction pattern similar to that of Fe-columbite (ICCD: 01 074-7356). Further annealing at 1000 °C and higher temperatures caused changes in the phase composition of the sample. It was proposed that under self-irradiation a single-phase U-Th-beari

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DO - 10.1557/opl.2014.660

M3 - Conference contribution

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SP - 313

EP - 318

BT - Symposium NW – Scientific Basis for Nuclear Waste Management XXXVII

PB - Cambridge University Press

ER -

A study of natural metamict yttrium niobate as analogue of actinide ceramic waste form

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