Thorium phosphates, method for preparing same, and use thereof for storing radioactive materials
US5953678A · kind A · utility
5Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Sep 18, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21F9/302
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to novel thorium phosphates, their preparation process and their use for the storage of radioactive products. These novel thorium phosphates comply with the formulas Th.sub.4 P.sub.6 O.sub.23 (I) or Th.sub.4-x M.sub.4x/v P.sub.6 O.sub.23 (III) in which: PA1 M is a monovalent, divalent, trivalent or tetravalent cation, PA1 v represents the valency state of the cation and is equal to 1, 2, 3 or 4, and PA1 x is such that: PA2 0<x.ltoreq.3 when v=4 PA2 0<x.ltoreq.0.26 when v=3 PA2 0<x.ltoreq.0.1 when v=2, and PA2 0<x.ltoreq.0.036 when v=1. The cation M can in particular be a radioactive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.