Zobrazeno 1 - 10
of 22
pro vyhledávání: '"B. C. Tofield"'
Autor:
B C Tofield, J M Newsam
Publikováno v:
Journal of Physics C: Solid State Physics. 14:1545-1554
The low-temperature structure of stoichiometric silver beta alumina, AgAl11O17, is described for the first time. A powder neutron diffraction study at 4.2K reveals that there is a single three-fold silver location of unit occupancy in each mirror pla
Autor:
B. C. Tofield, H. P. Weber
Publikováno v:
Physical Review B. 10:4560-4567
Spectroscopic measurements are reported on single crystals of the high-${\mathrm{Nd}}^{3+}$-concentration perovskite ${\mathrm{Cs}}_{2}$NaNd${\mathrm{Cl}}_{6}$ [$\ensuremath{\rho}(\mathrm{Nd})=3.2\ifmmode\times\else\texttimes\fi{}{10}^{21}$ ${\mathrm
Publikováno v:
Journal of Physics C: Solid State Physics. 14:511-519
The far-infrared absorption spectrum of stoichiometric silver beta -alumina shows that the silver ions occupy predominantly a single type of site at low temperature. By contrast, in non-stoichiometric silver beta -alumina three principal configuratio
Publikováno v:
Journal of Physics C: Solid State Physics. 13:6441-6451
The structure of the high-temperature, plastic form of lithium sulphate has been determined from neutron powder diffraction data collected at 908K. The structure is face-centred cubic, a=7.07 AA with the SO42- ion situated at the origin and the oxyge
Publikováno v:
Journal of Physics C: Solid State Physics. 13:4217-4228
Infrared absorption studies of hydrogen beta alumina prepared either from ammonium beta alumina or from silver beta alumina reveal an O-H stretching vibration near 3510 cm-1. This evidence, showing hydrogen to be chemically bound to the beta alumina
Autor:
B. C. Tofield, P.T. Moseley
Publikováno v:
Materials Science and Technology. 1:505-509
The technology associated with the use of semiconductors in monitoring the composition of the atmosphere has been advancing rapidly in recent years. The twin demands of remote process control and concern for the environment have produced requirements
Publikováno v:
Nature. 276:217-220
Publikováno v:
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 31:641-646
Publikováno v:
Materials Chemistry and Physics. 17:577-583
The key parameters on which the function of resistance-modulating tin dioxide gas sensors depends nave been studied. A model based on the controlling influence of chemisorbed oxygen molecules is supported by electrical conductivity measurements perfo
Publikováno v:
Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry. 38:2775-2781