Refinement of the structure of Li2TiO3

Dorrian, J.F.; Newnham, R. E.

doi:10.1016/0025-5408(69)90054-3

Cited by 145 publications

(70 citation statements)

References 6 publications

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“…In ordered ␤-Li 2 TiO 3 a layer accommodates one-third Li and two-thirds Ti with alternate layers occupied only by lithium atom, such that the formula may be written as Li(Li 1/3 Ti 2/3 )O 2 . 13 Li-Ti ordered with the mixed cation layer and its symmetry is reduced to monoclinic C2/c. The typical mean bond lengths, Li-O and Ti-O bond are 2.14 and 1.95 Å, respectively.…”

Section: Resultsmentioning

confidence: 98%

“…The typical mean bond lengths, Li-O and Ti-O bond are 2.14 and 1.95 Å, respectively. 13 Therefore the plate like habit and microcracks are caused by the easy cleavage on (0 0 1) because of the weak Li-O bonds and phase transformation. With increasing x, the preferred orientation growth and cleavage diminished and disappeared as x ≥ 0.3, which is in agreement with the variation trend of cations ordering with MgO content.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

New high Q microwave dielectric ceramics with rock salt structures: (1−x)Li2TiO3+xMgO system (0≤x≤0.5)

Bian

Dong

2010

Journal of the European Ceramic Society

138

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

New high Q microwave dielectric ceramics with rock salt structures: (1−x)Li2TiO3+xMgO system (0≤x≤0.5)

Bian

Dong

2010

Journal of the European Ceramic Society

138

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“…Regarding C2/c symmetry all of the Li cations reside in octahedral sites in b-Li 2 TiO 3 . 34 While the two magnetically inequivalent positions 8f and 4d in the pure Li-layer are fully occupied by lithium cations (Li(1) and Li (2)), Ti and the residual Li ions, Li(3), share the 4e position in the LiTi 2 layers being characterized by two crystallographically inequivalent titanium sites Ti(1) and Ti (2). Each LiTi 2 plane can be described as a honeycomb structure with six Ti ions creating a hexagon centered on a Li ion.…”

Section: Resultsmentioning

confidence: 99%

Extremely slow Li ion dynamics in monoclinic Li2TiO3—probing macroscopic jump diffusion via7Li NMR stimulated echoes

Ruprecht

Wilkening

Uecker

et al. 2012

Phys. Chem. Chem. Phys.

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A thorough understanding of ion dynamics in solids, which is a vital topic in modern materials and energy research, requires the investigation of diffusion properties on a preferably large dynamic range by complementary techniques. Here, a polycrystalline sample of Li 2 TiO 3 was used as a model substance to study Li motion by both 7 Li spin-alignment echo (SAE) nuclear magnetic resonance (NMR) and ac-conductivity measurements. Although the two methods do probe Li dynamics in quite different ways, good agreement was found so that the Li diffusion parameters, such as jump rates and the activation energy, could be precisely determined over a dynamic range of approximately eleven decades.

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“…For materials towards Ti rich side of the LT-L2S tie-line the dominance of Li 2 TiO 3 in its monoclinic phase with space group C2/c is apparent [29,61,62]. This phase is found alongside lithium carbonate after drying, as shown in Figure 4, and demonstrates stability up to 1150°C with increasing crystallite size, as indicated by higher and narrower diffraction peaks.…”

Section: Htxrdmentioning

confidence: 95%

Solution based synthesis of mixed-phase materials in the Li2TiO3–Li4SiO4 system

Hanaor

Kolb

Gan

et al. 2015

Journal of Nuclear Materials

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Abstract:As candidate tritium breeder materials for use in the ITER helium cooled pebble bed, ceramic multiphasic compounds lying in the region of the quasi-binary lithium metatitanate-lithium orthosilicate system may exhibit mechanical and physical advantages relative to single phase materials. Here we present an organometallic solution-based synthesis procedure for the low-temperature fabrication of compounds in the Li 2 TiO 3 -Li 4 SiO 4 region and investigate phase stability and transformations through temperature varied X-ray diffraction and scanning calorimetry. Results demonstrate that the metatitanate and metasilicate phases Li 2 TiO 3 and Li 2 SiO 3 readily crystallise in nanocrystalline form at temperatures below 180°C. Lithium deficiency in the region of 5% results from Li sublimation from Li 4 SiO 4 and/or from excess Li incorporation in the metatitanate phase and brings about a stoichiometry shift and product compounds with mixed lithium orthosilicate/ metasilicate content towards the Si rich region and predominantly Li 2 TiO 3 content towards the Ti rich region. Above 1150°C the transformation of monoclinic to cubic γ-Li 2 TiO 3 disordered solid-solution occurs while the melting of silicate phases indicates a likely monotectic type system with a solidus line in the region 1050°-1100°C. Synthesis procedures involving a lithium chloride precursor are not likely to be a viable option for breeder pebble synthesis as this route was found to yield materials with a more significant Li-deficiency exhibiting the crystallisation of the Li 2 TiSiO 5 phase at intermediate compositions.

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Refinement of the structure of Li2TiO3

Cited by 145 publications

References 6 publications

New high Q microwave dielectric ceramics with rock salt structures: (1−x)Li2TiO3+xMgO system (0≤x≤0.5)

New high Q microwave dielectric ceramics with rock salt structures: (1−x)Li2TiO3+xMgO system (0≤x≤0.5)

Extremely slow Li ion dynamics in monoclinic Li2TiO3—probing macroscopic jump diffusion via7Li NMR stimulated echoes

Solution based synthesis of mixed-phase materials in the Li2TiO3–Li4SiO4 system

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