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| Titel |
The reasons for the color green fluorite Mehmandooye cover using UV spectroscopy and XRF results |
| VerfasserIn |
Sara Pirzadeh, Reza Zahiri |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250135715
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| Publikation (Nr.) |
 EGU/EGU2016-16614.pdf |
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| Zusammenfassung |
| Fluorite mineral or fluorine with chemical formula CaF2 is most important mineralfluor in nature. This mineral crystallization to colors yellow, green, pink, blue, purple, colorless and sometimes black andin cubic system crystallized.assemi transparent and glass with polished.fluoritethe purity include 48/9% fluoreand 51/9% calcium.
How the creation colors in minerals different greatly indebted to Kurt Nassau research from Bell Labs, Murray Hill, New Jersey.almostall the mechanisms that cause color in minerals, are the result of the interaction of light waves with the electrons
The main factors affecting the color generation include the following:
1)the presence of a constructive element inherent (essential ingredient mineral composition)
2)The presence of a minor impurities (such a element as involved in latticesolid solution)
3) appearancedefects in the crystal structure
4) There are some physical boundaries with distances very small and delicate, like blades out of the solution (which may be the play of colors or Chatvyansy)
5) Mixing mechanical impurities dispersed in a host mineral
Based on the results of the analysis, XRF and UV spectrum and also based on the results of ICP, because the color green fluorite examined, the focus color (F_center) and also the presence of some elementsintermediate (such as Y (yttrium).
[1] Bill, H., Calas, G. Color centres associated rare earth ions and the origin of coloration
in natural fluorites// PhysChem Min, (1978), v 3, pp. 117-131. |
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