Application of thermal treatment for the interpretation of photoluminescent centres in minerals

M. Gaft

doi:10.1007/BF02546556

Application of thermal treatment for the interpretation of photoluminescent centres in minerals

M. Gaft

Research output: Contribution to journal › Article › peer-review

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Abstract

The influence of thermal treatments on photoluminescence spectra of several minerals has been investigated. By applying step-wise heating, new luminescence centres were detected which had been not previously recognized in the corresponding minerals. Luminsecence centres appearing as result of valence changing during oxidizing heating include: (i) (UO₂)²⁺ as a result of nonluminescent U⁶⁺ transformation in zircon, barite, francolite and chert; (ii) Eu²⁺ as a result of nonluminescent Eu⁺ transformation in barite. Luminescence centres which were most stable under thermal treatment were Fe³⁺ in zircon and Mn²⁺ in barite. Luminescence centres with similar spectral-kinetic properties but with different thermal stability which allowed them to be separated and properly identified were different metaloxygen complexes (MeO_n)^m- in zircon.

Original language	English
Pages (from-to)	67-78
Number of pages	12
Journal	Journal of Thermal Analysis
Volume	40
Issue number	1
DOIs	https://doi.org/10.1007/BF02546556
State	Published - Feb 1993
Externally published	Yes

Keywords

photoluminescent centres in minerals

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10.1007/BF02546556

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abstract = "The influence of thermal treatments on photoluminescence spectra of several minerals has been investigated. By applying step-wise heating, new luminescence centres were detected which had been not previously recognized in the corresponding minerals. Luminsecence centres appearing as result of valence changing during oxidizing heating include: (i) (UO2)2+ as a result of nonluminescent U6+ transformation in zircon, barite, francolite and chert; (ii) Eu2+ as a result of nonluminescent Eu+ transformation in barite. Luminescence centres which were most stable under thermal treatment were Fe3+ in zircon and Mn2+ in barite. Luminescence centres with similar spectral-kinetic properties but with different thermal stability which allowed them to be separated and properly identified were different metaloxygen complexes (MeOn)m- in zircon.",

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AB - The influence of thermal treatments on photoluminescence spectra of several minerals has been investigated. By applying step-wise heating, new luminescence centres were detected which had been not previously recognized in the corresponding minerals. Luminsecence centres appearing as result of valence changing during oxidizing heating include: (i) (UO2)2+ as a result of nonluminescent U6+ transformation in zircon, barite, francolite and chert; (ii) Eu2+ as a result of nonluminescent Eu+ transformation in barite. Luminescence centres which were most stable under thermal treatment were Fe3+ in zircon and Mn2+ in barite. Luminescence centres with similar spectral-kinetic properties but with different thermal stability which allowed them to be separated and properly identified were different metaloxygen complexes (MeOn)m- in zircon.

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Application of thermal treatment for the interpretation of photoluminescent centres in minerals

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Keywords

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