Incommensurate modulations in a hollandite phase Bax(Al, Fe)2xTi8–2xO16 intended for the storage of radioactive wastes: a (3+1) dimension structure determination
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Virginie Aubin-Chevaldonnet
Intensive researches on specific treatments of radioactive cesium, occurring in high level nuclear wastes, are in progress in France. Nowadays, a cesium immobilization in host matrices with a high chemical durability seems to be the favourite option. In that perspective, titanium based upon hollandite is a good candidate as a host matrix because of its high cesium incorporation ability, its excellent chemical stability, and its capacity to support charge compensation during the Cs+ into Ba2+ transmutation process. In this study we report the preparation and crystal growth in a BaF2—B2O3 flux melt of the BaxCsyMzTi8–zO16 hollandite phase and its characterization by single crystal X-ray diffraction. An attention was focused on materials with M = Al or Al + Fe and with barium only since single crystals including cesium could not be obtained from the flux method. An incommensurate modulation of the Ba cation site occupancy, with I4/m(00γ)00 as a superspace group, was observed for all the single crystals under study.
© Oldenbourg Wissenschaftsverlag
Articles in the same Issue
- Incommensurate modulations in a hollandite phase Bax(Al, Fe)2xTi8–2xO16 intended for the storage of radioactive wastes: a (3+1) dimension structure determination
- The crystal structure of Li4[(UO2)2(W2O10)] and crystal chemistry of Li uranyl tungstates
- X-ray diffraction study of the piezoelectric properties of BiB3O6 single crystals
- Coupled Al/Si and O/N order/disorder in BaYb[Si4–xAlxOxN7–x]sialon: neutron powder diffraction and Monte Carlo simulations
- Temperature-dependent crystal structure analysis of methyl iodide by high-resolution neutron powder diffraction
- Polymorphism of Ag3VO4
- Structure characterization of molecular complexes for non-linear optical materials. II. 1 : 1 complexes of 4-methyl-morpholine-N-oxide (1) and 3-picoline-N-oxide (2) with 2,4,6-trinitrophenol, studied by X-ray, AM1 and DFT calculations
- Synthesis, thermal, spectroscopic and structural properties of di(aqua)bis(N, N′-dimethylethylenediamine-κ2N, N′)copper(II) acesulfamate
- Crystal and molecular structure analysis of 4-o-(4-methoxybenzoyl)-2-methyl-N-(2-pyridal)-2H-1,2-benzothiazine-3-carboxamide-1,1-dioxide from laboratory X-ray powder data
Articles in the same Issue
- Incommensurate modulations in a hollandite phase Bax(Al, Fe)2xTi8–2xO16 intended for the storage of radioactive wastes: a (3+1) dimension structure determination
- The crystal structure of Li4[(UO2)2(W2O10)] and crystal chemistry of Li uranyl tungstates
- X-ray diffraction study of the piezoelectric properties of BiB3O6 single crystals
- Coupled Al/Si and O/N order/disorder in BaYb[Si4–xAlxOxN7–x]sialon: neutron powder diffraction and Monte Carlo simulations
- Temperature-dependent crystal structure analysis of methyl iodide by high-resolution neutron powder diffraction
- Polymorphism of Ag3VO4
- Structure characterization of molecular complexes for non-linear optical materials. II. 1 : 1 complexes of 4-methyl-morpholine-N-oxide (1) and 3-picoline-N-oxide (2) with 2,4,6-trinitrophenol, studied by X-ray, AM1 and DFT calculations
- Synthesis, thermal, spectroscopic and structural properties of di(aqua)bis(N, N′-dimethylethylenediamine-κ2N, N′)copper(II) acesulfamate
- Crystal and molecular structure analysis of 4-o-(4-methoxybenzoyl)-2-methyl-N-(2-pyridal)-2H-1,2-benzothiazine-3-carboxamide-1,1-dioxide from laboratory X-ray powder data
