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Volume 3, Issue 10
April 1990
Advances in Cement Research Cover Image for Volume 3, Issue 10
Research Article| April 01 1990

Effect of the states of chromium ion on the colour characteristics of doped β-C2S

Feng Xiuji;
Feng Xiuji
Wuhan University of Technology
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Yan Peiyu
Yan Peiyu
Wuhan University of Technology
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Author & Article Information
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Department of Material Science, Wuhan University of Technology, Wuhan, Hubei 430070, People's Republic of China.

Publisher: Emerald Publishing
Online ISSN: 1751-7605
Print ISSN: 0951-7197
© 1990 Thomas Telford Ltd
1990
Advances in Cement Research (1990) 3 (10): 85–88.
https://doi.org/10.1680/adcr.1990.3.10.85

The state of chromium ions in β-C2S was studied according to crystalfield theory by optical spectroscopy and electron paramagnetic resonance. The energy levels of chromium ions were calculated. These ions exist in the form of Cr4+ and Cr5+, co-ordinated in distorted octahedra. The coloured β-C2S hydrate fades because the level of tight absorption decreases due to the valence change of chromium ions as chromium is leaked.

Keywords: cement
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© 1990 Thomas Telford Ltd
1990
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