512 Abstract
|Table of Contents|

The crystal structure and chemistry of pyrochlore- and hollandite-type minerals and their application as nuclear waste-forms(PDF)

MATERIALS CHINA[ISSN:1674-3962/CN:61-1473/TG]

Issue:
2016年第07期
Page:
1-5
Research Field:
特约研究论文
Publishing date:

Info

Title:
The crystal structure and chemistry of pyrochlore- and hollandite-type minerals and their application as nuclear waste-forms
Author(s):
LI Guowu12 * XING Xiaolin1 XU Kai1
(1. Crystal Structure and Chemistry Laboratory, Science Research Institute, China University of Geoscience (Beijing),
2. State Key Laboratory for Geological Processes and Mineral Resources, China University of Geoscience,
Keywords:
-
CLC:

PACS:
-
DOI:
10.7502/j.issn.1674-3962.2016.07.02
DocumentCode:

Abstract:
Pyrochlore- and hollandite-type minerals were extensively investigated as the nuclear waste-forms, showing the unique properties on thermal and chemical stabilities and irradiation resistance. In the past decade, our group methodically studied the crystal structure and chemistry of pyrochlore- and holladnite-type natural minerals and their synthesized compounds. According to X-ray diffraction analysis of fourteen synthesized rare-earth pyrochlore (Ree2B2O7, B=Ti, Zr), both Ree2Ti2O7 and Ree2Zr2O7 show obvious crystal structure variable. The study of hollandite crystal structure indicates that contents of cation A (A0-2B8O16, A=Na, K, Sr, Ba, etc., B=Ti, Fe, Mn, Al, etc.) in the tunnel and parameters regarding anisotropy usually cause one-dimension incommensurate modulation structure along with c direction. This paper summarized our recent results on their structure and chemistry, and reviewed the research and development of their application in nuclear waste immobilization.

References

Memo

Memo:
Last Update: 2016-06-29