Optical Spectra and Color Nature of Lithium Amphiboles
Optical absorption spectra of two lithium amphiboles of the pedrisite group from rare-metal peg-matites of the Sangilen rare-metal province in the southeastern part of Tyva have been studied. One of them – a limit magnesian fluoro-sodium pedrisite of yellow-green color – was taken from the rocks hos...
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Kazan Federal University
2016-03-01
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| Series: | Учёные записки Казанского университета: Серия Естественные науки |
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| Online Access: | http://kpfu.ru/portal/docs/F_1533347785/158_1_est_7.pdf |
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| author | S.I. Konovalenko A.I. Bakhtin A.G. Nikolaev |
| author_facet | S.I. Konovalenko A.I. Bakhtin A.G. Nikolaev |
| author_sort | S.I. Konovalenko |
| collection | DOAJ |
| description | Optical absorption spectra of two lithium amphiboles of the pedrisite group from rare-metal peg-matites of the Sangilen rare-metal province in the southeastern part of Tyva have been studied. One of them – a limit magnesian fluoro-sodium pedrisite of yellow-green color – was taken from the rocks hosting pegmatites, and another one – fluoro-sodium ferro-pedrisite of violet-blue color – was taken from pegmatites as such. It has been demonstrated that the color of the yellow-green mineral is associated with absorption bands of Cr3+ ions in the octahedral coordination. Absorption bands of Cr3+ ions in the spectrum of fluoro-sodium pedrisite are formed by a transmission window in the yellow-green region of the spectrum. Therefore, the color of this sample is yellow-green. The color of violet-blue pedrisite is de-fined by intensive absorption bands of charge transfer Fe2+ → Fe3+ 550, 680 nm. Very strong absorption bands of 550 and 680 nm are formed by a transmission window in the violet-blue region of the spectrum. Thus, the color of ferro-pedrisite is violet-blue. |
| format | Article |
| id | doaj-art-d4749143d1b94de09be2974811f1f254 |
| institution | Kabale University |
| issn | 1815-6169 2500-218X |
| language | English |
| publishDate | 2016-03-01 |
| publisher | Kazan Federal University |
| record_format | Article |
| series | Учёные записки Казанского университета: Серия Естественные науки |
| spelling | doaj-art-d4749143d1b94de09be2974811f1f2542025-02-03T10:46:06ZengKazan Federal UniversityУчёные записки Казанского университета: Серия Естественные науки1815-61692500-218X2016-03-01158194100Optical Spectra and Color Nature of Lithium AmphibolesS.I. Konovalenko0A.I. Bakhtin1A.G. Nikolaev2National Research Тomsk State University, Тomsk, 634050 RussiaKazan Federal University, Kazan, 420008 RussiaKazan Federal University, Kazan, 420008 RussiaOptical absorption spectra of two lithium amphiboles of the pedrisite group from rare-metal peg-matites of the Sangilen rare-metal province in the southeastern part of Tyva have been studied. One of them – a limit magnesian fluoro-sodium pedrisite of yellow-green color – was taken from the rocks hosting pegmatites, and another one – fluoro-sodium ferro-pedrisite of violet-blue color – was taken from pegmatites as such. It has been demonstrated that the color of the yellow-green mineral is associated with absorption bands of Cr3+ ions in the octahedral coordination. Absorption bands of Cr3+ ions in the spectrum of fluoro-sodium pedrisite are formed by a transmission window in the yellow-green region of the spectrum. Therefore, the color of this sample is yellow-green. The color of violet-blue pedrisite is de-fined by intensive absorption bands of charge transfer Fe2+ → Fe3+ 550, 680 nm. Very strong absorption bands of 550 and 680 nm are formed by a transmission window in the violet-blue region of the spectrum. Thus, the color of ferro-pedrisite is violet-blue.http://kpfu.ru/portal/docs/F_1533347785/158_1_est_7.pdfoptical spectrafluoro-sodium pedrisitefluoro-sodium ferro-pedrisitecolor nature |
| spellingShingle | S.I. Konovalenko A.I. Bakhtin A.G. Nikolaev Optical Spectra and Color Nature of Lithium Amphiboles Учёные записки Казанского университета: Серия Естественные науки optical spectra fluoro-sodium pedrisite fluoro-sodium ferro-pedrisite color nature |
| title | Optical Spectra and Color Nature of Lithium Amphiboles |
| title_full | Optical Spectra and Color Nature of Lithium Amphiboles |
| title_fullStr | Optical Spectra and Color Nature of Lithium Amphiboles |
| title_full_unstemmed | Optical Spectra and Color Nature of Lithium Amphiboles |
| title_short | Optical Spectra and Color Nature of Lithium Amphiboles |
| title_sort | optical spectra and color nature of lithium amphiboles |
| topic | optical spectra fluoro-sodium pedrisite fluoro-sodium ferro-pedrisite color nature |
| url | http://kpfu.ru/portal/docs/F_1533347785/158_1_est_7.pdf |
| work_keys_str_mv | AT sikonovalenko opticalspectraandcolornatureoflithiumamphiboles AT aibakhtin opticalspectraandcolornatureoflithiumamphiboles AT agnikolaev opticalspectraandcolornatureoflithiumamphiboles |