Fluorescence analysis of chromium-doped forsterite (Mg/sub 2/SiO/sub 4/)

Moncorgé, R.; Cormier, G.; Simkin, D. J.; Capobianco, J. A.

doi:10.1109/3.73548

Cited by 80 publications

(17 citation statements)

References 11 publications

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“…We calculated the crystal field and Racah parameters: 10Dq = 10150 cm − 1 , B = 860 cm − 1 , and Dq/B = 1.18, which are consistent with literature data [15,16]. Referring this Dq/B value in Tanabe-Sugano diagram, the sites of Cr 4+ in Mg 2 SiO 4 glass-ceramic is indeed at low field [17] since the cross point between 3 T 2 and 1 E is around 1.85, as presented in Fig. 6.…”

Section: Deconvolution Analysis Of Absorption and Emission Spectra Ofsupporting

confidence: 76%

“…The deconvolution results of transition, peak center and peak area are listed in Table 3. Peaks 1 and 2 (~1020 nm and~1068 nm) are attributed to Cr 3+ : 4 T 2 → 4 A 2 transitions and Peaks 3 and 4 (~1100 nm and~1180 nm) are Cr 4+ : 3 T 2 → 3 A 2 transitions in Mg 2 SiO 4 polycrystalline host [17]. Peaks 5 and 6 (~1450 nm and~1650 nm) could be attributed to Cr 4+ but in glass phase because the emission bands appear in glass #3 before heat-treatment, as shown in Fig.…”

Section: Deconvolution Analysis Of Absorption and Emission Spectra Ofmentioning

confidence: 99%

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The development of SiO2 resistant Cr-doped glass ceramics for high Cr4+ emission

Wang

Shen

2012

Journal of Non-Crystalline Solids

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Section: Deconvolution Analysis Of Absorption and Emission Spectra Ofsupporting

confidence: 76%

Section: Deconvolution Analysis Of Absorption and Emission Spectra Ofmentioning

confidence: 99%

The development of SiO2 resistant Cr-doped glass ceramics for high Cr4+ emission

Wang

Shen

2012

Journal of Non-Crystalline Solids

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“…The red emission band at around 650 nm is assigned to Mn 2+ impurity centre in an octahedral coordination and preferred in the M2 site, which was observed in meteoritic forsterite samples as well as in Mn-doped synthetic samples (McCormick et al, 1987;Benstock et al, 1997). The red-IR emission band at around 720 nm might be attributed to Cr 3+ in the M1 and/or M2 site, which acts as an activator and possibly associated with structural defect caused by interstitial Cr ions in IR region, according to the result of CL spectroscopy for Cr-doped forsterite (Moncorgé et al, 1991;Benstock et al, 1997).…”

Section: Fig 1 CL Spectrum Of Forsterite In Chondrule (Allende Metementioning

confidence: 71%

Thermal effects on cathodoluminescence in forsterite

et al. 2013

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Cathodoluminescence (CL) spectral analysis has been conducted for luminescent forsterite (olivine) of terrestrial and meteoritic origins. Two emission bands at 3.15 and 2.99 eV in blue region can be assigned to structural defect centres and two emission bands at 1.91 and 1.74 eV in red region to impurity centres of Mn 2+ and Cr 3+, respectively. These emissions reduce their intensities at higher temperature, suggesting a temperature quenching phenomenon. The activation energy in the quenching process was estimated by a least-square fitting of the Arrhenius plots using integrated intensity of each component as follows; blue emissions at 3.15 eV: 0.08-0.10 eV and at 2.99 eV: 0.09-0.11 eV, red emissions at 1.91 eV: ~0.01 eV and at 1.74 eV: ~0.02 eV. The quenching process can be construed by the non-radiative transition by assuming the Mott-Seitz model. The values of activation energies for blue emissions caused by structural defects correspond to the vibration energy of Si-O stretching mode in the lattice, and the values for red emissions caused by Mn and Cr impurity centres to Mg-O vibration energy. It implies that the temperature quenching energy might be transferred as a phonon to the specific lattice vibration.

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“…(Moncorgé et al 1991). The Mn 2+ ions prefer the M2 site and luminesce from the lowest split component of the 4T1(G) above the ground state (Green and Walker 1985).…”

Section: Comparison Of Present Data With Terrestrial Forsteritesmentioning

confidence: 99%

The fine‐grained matrix of the Semarkona LL3.0 ordinary chondrite: An induced thermoluminescence study

Craig

Sears

2009

Meteorit & Planetary Scien

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Abstract-To investigate the nature, origin, and history of the fine-grained matrix in Semarkona and develop techniques suitable for small samples, we have measured the induced thermoluminescence properties of six matrix samples 10 µm to 400 µm in size. The samples had TL sensitivities comparable with 4 mg of bulk samples of type 3.2-3.4 ordinary chondrites, which is very high relative to bulk Semarkona. The other induced TL properties of these samples, TL peak temperatures, and TL peak widths distinguish them from other ordinary chondrite samples where the TL is caused by feldspar. Cathodoluminescence images and other data suggest that the cause of the luminescence in the Semarkona fine-grained matrix is forsterite. In some respects the matrix TL data resemble that of Semarkona chondrules, in which the phosphor is forsterite and terrestrial forsterites from a variety of igneous and metamorphic environments. However, differences in the TL peak temperature versus TL peak width relationship between the matrix samples and the other forsterites suggest a fundamentally different formation mechanism. We also note that forsterite appears to be a major component in many primitive materials, such as nebulae, cometary dust, and Stardust particles.

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Fluorescence analysis of chromium-doped forsterite (Mg/sub 2/SiO/sub 4/)

Cited by 80 publications

References 11 publications

The development of SiO2 resistant Cr-doped glass ceramics for high Cr4+ emission

The development of SiO2 resistant Cr-doped glass ceramics for high Cr4+ emission

Thermal effects on cathodoluminescence in forsterite

The fine‐grained matrix of the Semarkona LL3.0 ordinary chondrite: An induced thermoluminescence study

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