Candoluminescence of cave gypsum
| Autor: | Sweet John R., Hess John W., White William B. |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | International Journal of Speleology, Vol 39, Iss 1, Pp 25-28 (2010) |
| Druh dokumentu: | article |
| ISSN: | 0392-6672 1827-806X |
| Popis: | A selection of gypsum specimens from a variety of caves as well as CaSO4 synthesized in the laboratory emit both a green and yellow candoluminescence when excited by a hydrogen diffusion flame. The green emission is attributed to dehydration of gypsum to bassanite and the yellow emission appears upon further dehydration to anhydrite. The source of the luminescence is ascribed to minor concentrations of Mn2+ in the gypsum. |
| Databáze: | Directory of Open Access Journals |
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