Spectroscopic and crystal field studies of LiAlO2:Mn2+ single crystals

Brik, M.G.; Teng, Hao; Lin, Hui; Zhou, Shengming; Avram, N.M.

doi:10.1016/j.jallcom.2010.06.160

Cited by 23 publications

(10 citation statements)

References 40 publications

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“…Differences in ionic radii of Li + , Al 3+ , Mn 2+ and Mn 3+ (0.076, 0.054, 0.083 and 0.065 nm, respectively) [22] indicate that the substitution of manganese ion for Li + is geometrically more favorable. Such a substitution was found in the γ-LiAlO 2 single crystal [43] in which both Al and Li are coordinated by four oxygen. Mn 2+ was located in LiO 4 tetrahedron.…”

Section: Spectroscopy Of Mn 3+ In Spodumenementioning

confidence: 67%

Some Complementary Data about the Spectroscopic Properties of Manganese Ions in Spodumene Crystals

et al. 2020

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The color change of the pink and colorless LiAlSi2O6 spodumene crystal due to irradiation and heating is explained. The hypothesis about the change of Mn3+ to Mn4+ after irradiation was rejected. For the studied crystals, it was shown that both Mn2+ and Mn3+ occupy the M2 (not the M1) crystal site. Spodumene crystals which are primary pink (kunzite) contain Mn3+ (and Mn2+) at the M1 site. By contrast, those that become pink due to irradiation and heating contain Mn3+ and Mn2+ at the M2 site. The emission band of the former is 625 nm, and for the latter, it is 591 nm.

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Section: Spectroscopy Of Mn 3+ In Spodumenementioning

confidence: 67%

Some Complementary Data about the Spectroscopic Properties of Manganese Ions in Spodumene Crystals

et al. 2020

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“…of the above examples [17][18][19] showed that this method of calculation energy of excited levels of Mn 2+ present in a low symmetrical lattice site does not give results consistent with the experimental data. Due to the low symmetry of the lattice site and the insufficient amount of experimental input data, especially the position of the 1 band, no such calculations were made for the minerals studied in this work.…”

Section: Methodsmentioning

confidence: 99%

“…Such calculations are successfully performed for 4f n ions. Brik et al [17] for LiAlO 2 :Mn 2+ (0.034 at%) and C 2 symmetry measured that ∆E = 616 cm −1 , while calculated only ∆E = 428 cm −1 . For Mn 2+ in willemite, Vaida [18,19] showed two sets of B p k parameters and calculated energy levels.…”

Section: Introductionmentioning

confidence: 97%

“…In the second [19], with changed B k p parameters, a complete split of energy levels was observed, but the obtained values of parameters B (945 cm −1 ), C (2851 cm −1 ), and Dq (340.5 cm −1 ) are rather not credible. Both of the above examples [17][18][19] showed that this method of calculation energy of excited levels of Mn 2+ present in a low symmetrical lattice site does not give results consistent with the experimental data. Due to the low symmetry of the lattice site and the insufficient amount of experimental input data, especially the position of the υ 1 band, no such calculations were made for the minerals studied in this work.…”

Section: Introductionmentioning

confidence: 99%

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Luminescence Properties of Tetrahedral Coordinated Mn2+; Genthelvite and Willemite Examples

et al. 2021

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The cause of the split of 4A4E(4G) Mn2+ excited level measured on minerals spectra is discussed. It is our view that ∆E = |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 Dq parameter can indicate which of the two non-equivalent lattice sites positions in the willemite crystal structure was occupied by Mn2+. The above conclusions were confirmed by X-ray structure measurements. Significant differences were also noted in the Raman spectra of these willemites.

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“…ECM has been successfully applied for the calculations of energy level of rare earth ions [13,22,23] and references therein and transition metal ions [24][25][26][27][28][29] and references therein.…”

Section: Crystal Field Calculations For Kal(moo 4 ) 2 :Cr 3 þmentioning

confidence: 99%

Exchange charge model and analysis of the microscopic crystal field effects in KAl(MoO4)2:Cr3+

Brik¹,

Avram²

2011

Journal of Luminescence

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Spectroscopic and crystal field studies of LiAlO2:Mn2+ single crystals

Cited by 23 publications

References 40 publications

Some Complementary Data about the Spectroscopic Properties of Manganese Ions in Spodumene Crystals

Some Complementary Data about the Spectroscopic Properties of Manganese Ions in Spodumene Crystals

Luminescence Properties of Tetrahedral Coordinated Mn2+; Genthelvite and Willemite Examples

Exchange charge model and analysis of the microscopic crystal field effects in KAl(MoO4)2:Cr3+

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