Identifying characteristics of the fibrous cesium titanate Cs 2Ti 5O 11
Electron microscopic studies of the fibrous cesium titanate Cs 2Ti 5O 11 reveal characteristic features not readily apparent using standard methods of phase analysis (optical microscopy, X-ray diffraction). Its fibrous needle-like laths give characteristic diffuse scattering, complicating the indexi...
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| Published in | Journal of solid state chemistry Vol. 69; no. 2; pp. 360 - 368 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Inc
1987
|
| Online Access | Get full text |
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| Abstract | Electron microscopic studies of the fibrous cesium titanate Cs
2Ti
5O
11 reveal characteristic features not readily apparent using standard methods of phase analysis (optical microscopy, X-ray diffraction). Its fibrous needle-like laths give characteristic diffuse scattering, complicating the indexing of electron diffraction patterns. The hydrated form Cs
2Ti
5O
11 · (1 +
x)H
2O (0.5 <
x < 1) is typically grossly distorted, resembling pyrolytic graphite. Cs
2Ti
5O
11 is unstable when stored under ambient conditions at room temperature for ∼1 year when disproportionation into Cs
2Ti
4O
9 and Cs
2Ti
6O
11 ·
nH
2O occurs. The structure of Cs
2Ti
5O
11 and intergrowth defects in the unstable forms have been studied by high-resolution electron microscopy. It is evident that these phases would be undesirable in titanate ceramics such as SYNROC, which are designed for immobilization of radioactive
137C
s. |
|---|---|
| AbstractList | Electron microscopic studies of the fibrous cesium titanate Cs
2Ti
5O
11 reveal characteristic features not readily apparent using standard methods of phase analysis (optical microscopy, X-ray diffraction). Its fibrous needle-like laths give characteristic diffuse scattering, complicating the indexing of electron diffraction patterns. The hydrated form Cs
2Ti
5O
11 · (1 +
x)H
2O (0.5 <
x < 1) is typically grossly distorted, resembling pyrolytic graphite. Cs
2Ti
5O
11 is unstable when stored under ambient conditions at room temperature for ∼1 year when disproportionation into Cs
2Ti
4O
9 and Cs
2Ti
6O
11 ·
nH
2O occurs. The structure of Cs
2Ti
5O
11 and intergrowth defects in the unstable forms have been studied by high-resolution electron microscopy. It is evident that these phases would be undesirable in titanate ceramics such as SYNROC, which are designed for immobilization of radioactive
137C
s. |
| Author | Bursill, L.A. Kwiatkowska, Jadwiga Smith, David J. |
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| Copyright | 1987 |
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| DOI | 10.1016/0022-4596(87)90094-6 |
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| References | Grey, Madsen, Watts, Bursill, Kwiatkowska (BIB2) 1985; 58 Kwiatkowska (BIB7) 1985 Bursill, Kwiatkowska (BIB1) 1984; 52 Ringwood, Kesson, Ware, Hibberson, Major (BIB4) 1979; 13 White (BIB3) February 1984 Fujiki, Komatsu, Sasaki, Ohta (BIB5) 1981; 10 Kwiatkowska, Grey, Madsen, Bursill (BIB6) 1987 |
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| Snippet | Electron microscopic studies of the fibrous cesium titanate Cs
2Ti
5O
11 reveal characteristic features not readily apparent using standard methods of phase... |
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| Title | Identifying characteristics of the fibrous cesium titanate Cs 2Ti 5O 11 |
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