INVESTIGATION OF METAMICT AND ANNEALED NATURAL PYROCHLORES BY X-RAY ABSORPTION SPECTROSCOPY.

R. B. Greegor; F. W. Lytle; B. C. Chakoumakos; G. R. Lumpkin; R. C. Ewing

INVESTIGATION OF METAMICT AND ANNEALED NATURAL PYROCHLORES BY X-RAY ABSORPTION SPECTROSCOPY.

R. B. Greegor, F. W. Lytle, B. C. Chakoumakos, G. R. Lumpkin, R. C. Ewing

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

15 Scopus citations

Abstract

The pyrochlore structure type is a common phase in polycrystalline waste forms. A principal concern has been the effect of alpha-recoil events on the long-term stability of these phases. Naturally occurring minerals of the pyrochlore group provide an example of the full range of radiation effects from fully crystalline to x-ray diffraction amorphous (the metamict state). X-ray absorption spectroscopy is used to investigate the coordination geometry of Ti-sites in metamict and annealed pyrochlores. The principal effects in the fully-damaged material compared to annealed samples include an increase in the asymmetry of the Ti-site and a slight reduction in bond length and coordination number.

Original language	English
Title of host publication	Materials Research Society Symposia Proceedings
Editors	Carol M. Jantzen, John A. Stone, Rodney C. Ewing
Publisher	Materials Research Soc
Pages	655-662
Number of pages	8
ISBN (Print)	093183709X
State	Published - 1985
Externally published	Yes

Publication series

Name	Materials Research Society Symposia Proceedings
Volume	44
ISSN (Print)	0272-9172

Cite this

Greegor, R. B., Lytle, F. W., Chakoumakos, B. C., Lumpkin, G. R., & Ewing, R. C. (1985). INVESTIGATION OF METAMICT AND ANNEALED NATURAL PYROCHLORES BY X-RAY ABSORPTION SPECTROSCOPY. In C. M. Jantzen, J. A. Stone, & R. C. Ewing (Eds.), Materials Research Society Symposia Proceedings (pp. 655-662). (Materials Research Society Symposia Proceedings; Vol. 44). Materials Research Soc.

@inproceedings{a181dac7718140c9b3503b7e88a8fd03,

title = "INVESTIGATION OF METAMICT AND ANNEALED NATURAL PYROCHLORES BY X-RAY ABSORPTION SPECTROSCOPY.",

abstract = "The pyrochlore structure type is a common phase in polycrystalline waste forms. A principal concern has been the effect of alpha-recoil events on the long-term stability of these phases. Naturally occurring minerals of the pyrochlore group provide an example of the full range of radiation effects from fully crystalline to x-ray diffraction amorphous (the metamict state). X-ray absorption spectroscopy is used to investigate the coordination geometry of Ti-sites in metamict and annealed pyrochlores. The principal effects in the fully-damaged material compared to annealed samples include an increase in the asymmetry of the Ti-site and a slight reduction in bond length and coordination number.",

author = "Greegor, \{R. B.\} and Lytle, \{F. W.\} and Chakoumakos, \{B. C.\} and Lumpkin, \{G. R.\} and Ewing, \{R. C.\}",

year = "1985",

language = "English",

isbn = "093183709X",

series = "Materials Research Society Symposia Proceedings",

publisher = "Materials Research Soc",

pages = "655--662",

editor = "Jantzen, \{Carol M.\} and Stone, \{John A.\} and Ewing, \{Rodney C.\}",

booktitle = "Materials Research Society Symposia Proceedings",

}

INVESTIGATION OF METAMICT AND ANNEALED NATURAL PYROCHLORES BY X-RAY ABSORPTION SPECTROSCOPY. / Greegor, R. B.; Lytle, F. W.; Chakoumakos, B. C. et al.
Materials Research Society Symposia Proceedings. ed. / Carol M. Jantzen; John A. Stone; Rodney C. Ewing. Materials Research Soc, 1985. p. 655-662 (Materials Research Society Symposia Proceedings; Vol. 44).

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

TY - GEN

T1 - INVESTIGATION OF METAMICT AND ANNEALED NATURAL PYROCHLORES BY X-RAY ABSORPTION SPECTROSCOPY.

AU - Greegor, R. B.

AU - Lytle, F. W.

AU - Chakoumakos, B. C.

AU - Lumpkin, G. R.

AU - Ewing, R. C.

PY - 1985

Y1 - 1985

N2 - The pyrochlore structure type is a common phase in polycrystalline waste forms. A principal concern has been the effect of alpha-recoil events on the long-term stability of these phases. Naturally occurring minerals of the pyrochlore group provide an example of the full range of radiation effects from fully crystalline to x-ray diffraction amorphous (the metamict state). X-ray absorption spectroscopy is used to investigate the coordination geometry of Ti-sites in metamict and annealed pyrochlores. The principal effects in the fully-damaged material compared to annealed samples include an increase in the asymmetry of the Ti-site and a slight reduction in bond length and coordination number.

AB - The pyrochlore structure type is a common phase in polycrystalline waste forms. A principal concern has been the effect of alpha-recoil events on the long-term stability of these phases. Naturally occurring minerals of the pyrochlore group provide an example of the full range of radiation effects from fully crystalline to x-ray diffraction amorphous (the metamict state). X-ray absorption spectroscopy is used to investigate the coordination geometry of Ti-sites in metamict and annealed pyrochlores. The principal effects in the fully-damaged material compared to annealed samples include an increase in the asymmetry of the Ti-site and a slight reduction in bond length and coordination number.

UR - https://www.scopus.com/pages/publications/0022182022

M3 - Conference contribution

AN - SCOPUS:0022182022

SN - 093183709X

T3 - Materials Research Society Symposia Proceedings

SP - 655

EP - 662

BT - Materials Research Society Symposia Proceedings

A2 - Jantzen, Carol M.

A2 - Stone, John A.

A2 - Ewing, Rodney C.

PB - Materials Research Soc

ER -

INVESTIGATION OF METAMICT AND ANNEALED NATURAL PYROCHLORES BY X-RAY ABSORPTION SPECTROSCOPY.

Abstract

Publication series

Other files and links

Fingerprint

Cite this