On the interpretation of the experimental Raman spectrum of β-eucryptite LiAlSiO4 from atomistic computer modeling

Sprengard, Ruediger; Binder, Kurt; Brändle, Martin; Fotheringham, Ulrich; Sauer, Joachim; Pannhorst, W.

doi:10.1016/s0022-3093(00)00218-0

Cited by 13 publications

(13 citation statements)

References 5 publications

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“…The band frequencies for b-eucryptite presented in Refs [24,25]. and obtained in our experiment are very similar while their FWHM and relative intensity are somewhat different.…”

supporting

confidence: 79%

Section: Raman Spectra Of Model B-quartz Ssmentioning

confidence: 99%

“…units [24]. The accuracy of the estimation of the frequency from figure in the article [24] is ±3 cm À1 , which leads to an error of 6 and 1.5 mol% in the estimation of [27], we designated this composition as VI) as the forth model compound. According to the Raman spectrum of this glass-ceramics, titania-containing phase crystallizes in the form of anatase, TiO 2 , which allows us to conclude that practically all Al 2 O 3 participates in crystallization of b-quartz ss with formula LiAlSi 3 O 8 , which, according to this assumption, contains 75% SiO 2 (x = 0.25).…”

Section: Raman Spectra Of Model B-quartz Ssmentioning

confidence: 99%

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Raman spectroscopy quantifying the composition of stuffed β-quartz derivative phases in lithium aluminosilicate glass-ceramics

Алексеева¹,

Дымшиц²,

Ермаков³

et al. 2008

Journal of Non-Crystalline Solids

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“…The band frequencies for b-eucryptite presented in Refs [24,25]. and obtained in our experiment are very similar while their FWHM and relative intensity are somewhat different.…”

supporting

confidence: 79%

Section: Raman Spectra Of Model B-quartz Ssmentioning

confidence: 99%

Section: Raman Spectra Of Model B-quartz Ssmentioning

confidence: 99%

See 1 more Smart Citation

Raman spectroscopy quantifying the composition of stuffed β-quartz derivative phases in lithium aluminosilicate glass-ceramics

Алексеева¹,

Дымшиц²,

Ермаков³

et al. 2008

Journal of Non-Crystalline Solids

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“…The spectra of pure β‐eucryptite at ambient pressure [Fig. (a)] were in agreement with previously reported Raman scans of pure β‐eucryptite, with two strong scattering lines around 484 and 1034 cm −1 . Sprengard et al .…”

Section: Resultssupporting

confidence: 90%

In situ Diamond Anvil Cell–Raman Spectroscopy and Nanoindentation Study of the Pressure‐Induced Phase Transformation in Pure and Zinc‐Doped β‐Eucryptite

2013

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b-eucryptite (LiAlSiO 4 ), a member of the family of lithium aluminum silicates, is known to undergo a reversible pressureinduced phase transformation at~0.8 GPa to e-eucryptite. This study correlates the results between two techniques, in situ diamond anvil cell-Raman spectroscopy and nanoindentation experiments, to explore how doping (substituting Zn for Li) influences this pressure-induced phase transformation. Diamond anvil cell tests carried up to 3 GPa hydrostatic stress under Raman spectroscopy were compared with nanoindentation results, which provide a more localized, multiaxial stress state. The results indicate that the magnitude of hysteresis observed (difference between the pressures required for the forward and reverse transformation) is lower for Zn-doped b-eucryptite; however, the onset of the phase transformation is unchanged by doping with Zn. Furthermore, calculations of activation volume from nanoindentation experiments yield similar values (~0.1 nm 3 ) for pure and Zn-doped b-eucryptite, suggesting that the nucleation event that establishes the onset of the phase transformation is the same for both materials.

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“…44 This Al 2 O 3 layer at the ZrTiO 4 -glass interphase decreases the interphase energy, allowing optimum preconditions for nucleation of the secondary phase, LiAlSi 2 O 6 , and retention of its nanometric crystal size. Nuclei formation in lithium-aluminosilicate glass ceramics was previously reported by Sprengard et al, 73 where TiO 2 is segregated from the glass network, acting as a nucleating agent.…”

Section: Glass Ceramics For Optically Active and Passive Materialsmentioning

confidence: 59%

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

Pablos-Martín

Durán

Pascual

2012

International Materials Reviews

150

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Rare earth (RE) doped oxyfluoride glass ceramics possess interesting optical properties with applications in telecommunications and optoelectronics, such as solid state lasers, optical amplifiers, etc. These materials combine the transparency and mechanical and chemical resistance of aluminosilicate glasses with the low phonon energy and facile incorporation of RE ions in the fluoride crystals. The incorporation of RE ions in the crystalline phases enhances the laser emission intensity, a major property of these materials. Transparency is achieved when crystal size is in the nanometric scale, usually below 40 nm, which avoids light scattering. A strict control of the nucleation and crystal growth processes is therefore necessary which requires a deep knowledge of the crystallisation mechanisms. The great activity and publications in this field in the last decades merit a review providing a comparative study of the different nanoglass ceramic systems, their structural and optical characterisation and their main properties and applications. This is the objective of this review paper which includes 232 references. A general discussion on glass nucleation and crystallisation theories and more relevant crystallisation parameters and characterisation techniques are put forward in the first section of the review, focused on nanocrystallisation processes in oxyfluoride systems. In the second section, the principal RE doped glass ceramics are presented. After a general introduction about the luminescence processes, including up-and down-conversion, the behaviour of RE elements in glasses and crystals are discussed. Glass ceramic compositions have been divided as follows: glass ceramics with a glass composition following Wang and Ohwaki's oxyfluoride glass ceramic, 1 ; and glass ceramics with different matrix compositions, arranged by crystalline phases. Relevant properties, mainly optical and laser, are described in each system along with the most relevant applications of these materials.

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On the interpretation of the experimental Raman spectrum of β-eucryptite LiAlSiO4 from atomistic computer modeling

Cited by 13 publications

References 5 publications

Raman spectroscopy quantifying the composition of stuffed β-quartz derivative phases in lithium aluminosilicate glass-ceramics

Raman spectroscopy quantifying the composition of stuffed β-quartz derivative phases in lithium aluminosilicate glass-ceramics

In situ Diamond Anvil Cell–Raman Spectroscopy and Nanoindentation Study of the Pressure‐Induced Phase Transformation in Pure and Zinc‐Doped β‐Eucryptite

Nanocrystallisation in oxyfluoride systems: mechanisms of crystallisation and photonic properties

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