Luminescence Properties of Tetrahedral Coordinated Mn<sup>2+</sup>; Genthelvite and Willemite Examples
The cause of the split of <sup>4</sup>A<sup>4</sup>E(<sup>4</sup>G) Mn<sup>2+</sup> excited level measured on minerals spectra is discussed. It is our view that ∆<i>E</i> = |4E(4G) − 4A(4G)| should be considered an important spectroscopic p...
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oai:doaj.org-article:ed4507d88767402caaf06214aa18014d2021-11-25T18:26:21ZLuminescence Properties of Tetrahedral Coordinated Mn<sup>2+</sup>; Genthelvite and Willemite Examples10.3390/min111112152075-163Xhttps://doaj.org/article/ed4507d88767402caaf06214aa18014d2021-10-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1215https://doaj.org/toc/2075-163XThe cause of the split of <sup>4</sup>A<sup>4</sup>E(<sup>4</sup>G) Mn<sup>2+</sup> excited level measured on minerals spectra is discussed. It is our view that ∆<i>E</i> = |4E(4G) − 4A(4G)| should be considered an important spectroscopic parameter. Among the possible reasons for the energy levels splitting taken under consideration, such as the covalent bond theory, the geometric deformation of the coordination polyhedron and the lattice site’s symmetry, the first one was found to be inappropriate. Two studied willemite samples showed that the impurities occur in one of the two available lattice sites differently in both crystals. Moreover, it was revealed that the calculated crystal field <i>Dq</i> parameter can indicate which of the two non-equivalent lattice sites positions in the willemite crystal structure was occupied by Mn<sup>2+</sup>. The above conclusions were confirmed by X-ray structure measurements. Significant differences were also noted in the Raman spectra of these willemites.Maria CzajaRadosław LisieckiRafał JuroszekTomasz KrzykawskiMDPI AGarticleMn<sup>2+</sup>luminescenceenergy of excited levelcrystal field parametersMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1215, p 1215 (2021) |
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Mn<sup>2+</sup> luminescence energy of excited level crystal field parameters Mineralogy QE351-399.2 |
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Mn<sup>2+</sup> luminescence energy of excited level crystal field parameters Mineralogy QE351-399.2 Maria Czaja Radosław Lisiecki Rafał Juroszek Tomasz Krzykawski Luminescence Properties of Tetrahedral Coordinated Mn<sup>2+</sup>; Genthelvite and Willemite Examples |
| description |
The cause of the split of <sup>4</sup>A<sup>4</sup>E(<sup>4</sup>G) Mn<sup>2+</sup> excited level measured on minerals spectra is discussed. It is our view that ∆<i>E</i> = |4E(4G) − 4A(4G)| should be considered an important spectroscopic parameter. Among the possible reasons for the energy levels splitting taken under consideration, such as the covalent bond theory, the geometric deformation of the coordination polyhedron and the lattice site’s symmetry, the first one was found to be inappropriate. Two studied willemite samples showed that the impurities occur in one of the two available lattice sites differently in both crystals. Moreover, it was revealed that the calculated crystal field <i>Dq</i> parameter can indicate which of the two non-equivalent lattice sites positions in the willemite crystal structure was occupied by Mn<sup>2+</sup>. The above conclusions were confirmed by X-ray structure measurements. Significant differences were also noted in the Raman spectra of these willemites. |
| format |
article |
| author |
Maria Czaja Radosław Lisiecki Rafał Juroszek Tomasz Krzykawski |
| author_facet |
Maria Czaja Radosław Lisiecki Rafał Juroszek Tomasz Krzykawski |
| author_sort |
Maria Czaja |
| title |
Luminescence Properties of Tetrahedral Coordinated Mn<sup>2+</sup>; Genthelvite and Willemite Examples |
| title_short |
Luminescence Properties of Tetrahedral Coordinated Mn<sup>2+</sup>; Genthelvite and Willemite Examples |
| title_full |
Luminescence Properties of Tetrahedral Coordinated Mn<sup>2+</sup>; Genthelvite and Willemite Examples |
| title_fullStr |
Luminescence Properties of Tetrahedral Coordinated Mn<sup>2+</sup>; Genthelvite and Willemite Examples |
| title_full_unstemmed |
Luminescence Properties of Tetrahedral Coordinated Mn<sup>2+</sup>; Genthelvite and Willemite Examples |
| title_sort |
luminescence properties of tetrahedral coordinated mn<sup>2+</sup>; genthelvite and willemite examples |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/ed4507d88767402caaf06214aa18014d |
| work_keys_str_mv |
AT mariaczaja luminescencepropertiesoftetrahedralcoordinatedmnsup2supgenthelviteandwillemiteexamples AT radosławlisiecki luminescencepropertiesoftetrahedralcoordinatedmnsup2supgenthelviteandwillemiteexamples AT rafałjuroszek luminescencepropertiesoftetrahedralcoordinatedmnsup2supgenthelviteandwillemiteexamples AT tomaszkrzykawski luminescencepropertiesoftetrahedralcoordinatedmnsup2supgenthelviteandwillemiteexamples |
| _version_ |
1718411168680247296 |