Percival, M. J. L. (1990) Optical absorption spectroscopy of doped materials: the P213-P212121 phase transition in K2(Cd0.98Co0.02)2(SO4)3. Mineralogical Magazine, 54 (377) 525-535 doi:10.1180/minmag.1990.054.377.01
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Optical absorption spectroscopy of doped materials: the P213-P212121 phase transition in K2(Cd0.98Co0.02)2(SO4)3 | ||
| Journal | Mineralogical Magazine | ISSN | 0026-461X |
| Authors | Percival, M. J. L. | Author | |
| Year | 1990 (December) | Volume | 54 |
| Issue | 377 | ||
| Publisher | Mineralogical Society | ||
| Download URL | https://rruff.info/doclib/MinMag/Volume_54/54-377-525.pdf+ | ||
| DOI | doi:10.1180/minmag.1990.054.377.01Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 1656 | Long-form Identifier | mindat:1:5:1656:2 |
| GUID | 0 | ||
| Full Reference | Percival, M. J. L. (1990) Optical absorption spectroscopy of doped materials: the P213-P212121 phase transition in K2(Cd0.98Co0.02)2(SO4)3. Mineralogical Magazine, 54 (377) 525-535 doi:10.1180/minmag.1990.054.377.01 | ||
| Plain Text | Percival, M. J. L. (1990) Optical absorption spectroscopy of doped materials: the P213-P212121 phase transition in K2(Cd0.98Co0.02)2(SO4)3. Mineralogical Magazine, 54 (377) 525-535 doi:10.1180/minmag.1990.054.377.01 | ||
| In | (1990, December) Mineralogical Magazine Vol. 54 (377) Mineralogical Society | ||
| Abstract/Notes | AbstractThe use of optical absorption spectroscopy for the study of the changes in local distortions during phase transformations is discussed, with particular reference to the P213-P212121 transition in K2Co2(SO4)3 langbeinite. In order to extend this technique to the study of cobalt-doped cadmium langbeinite, K2Cd2(SO4)3, the consequences of the doping with regard to site occupancies and low signal strength are discussed, and some details of data modelling are considered. The problem of modelling the spectrum of Finero sapphirine is taken as an example, and it is shown that even simple and evidently inadequate models can provide useful information.The results of optical spectroscopic investigation of the P213-P212121 transition in K2(Cd0.98Co0.02)2(SO4)3 langbeinite are presented. The trigonal splitting of the spin allowed 4T1g(F)-4T1g(P) transition has been determined, and shows a linear increase with increasing temperature in the high temperature cubic phase, and a constant value in the low temperature phase. This is in good agreement with previous structural work on this material, and it is concluded that optical spectroscopy of doped materials can provide useful information about site distortions. | ||
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