Hochtemperatur-Lanthanborat

In the last years, several investigations were performed in the ternary system Sn−B−O as a simplified variant of the tin-based amorphous composite oxide (TCO), a material in use as negative electrode of lithium-ion rechargeable batteries. All compounds in this system are glasses, so the synthesis of crystalline approximands for a more detailed structural investigation would be favorable. The use of high-pressure/high-temperature conditions (7.5 GPa and 1100 °C; Walker-type multianvil apparatus) led to the synthesis of the first crystalline tin borate β-SnB4O7. The single-crystal structure determination of β-SnB4O7 showed Pmn21, a = 1086.4(2) pm, b = 444.80(9) pm, c = 423.96(8) pm, Z = 2, R 1 = 0.0155, and wR 2 = 0.0324 (all data). In contrast to the isotypic phases MB4O7 (M = Sr, Pb, Eu, β-Ca, and β-Hg), the position of the tin atom in β-SnB4O7 is influenced by the existence of a stereochemically active lone pair. Furthermore, we report on thermoanalytical aspects (DTA-TG and temperature-resolved in situ powder diffraction), DFT calculations, IR spectroscopy, Mössbauer spectroscopic results, and solid-state NMR investigations on β-SnB4O7. The latter method allows us to make a general differentiation of Sn2+ and Sn4+ in Sn−O systems on the basis of well-separated 117/119Sn chemical shifts.

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“…80,81 and Eu 2 B 4 O 9 82. Because BO 3 groups are missing in β-SnB 4 O 7 , the absorptions can be assigned to the corresponding OB 3 vibrations.…”

mentioning

confidence: 99%

Pressure-Induced Crystallization and Characterization of the Tin Borate β-SnB₄O₇

et al. 2006

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“…Fig. 4 groups as in l-LaBO 3 [38], H-LaBO 3 [39], or EuB 2 O 4 [40]. Due to the fact that eight different tetrahedra and two trigonal groups occur in the structure of Pr 4 B 10 O 21 , a more detailed assignment of the bands is not possible.…”

Section: Infrared Spectroscopy Of Pr 4 B 10 O 21mentioning

confidence: 96%

Pr4B10O21: A new composition of rare-earth borates by high-pressure/high-temperature synthesis

Haberer

Heymann

Huppertz

2007

Journal of Solid State Chemistry

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“…4 [14,19], which shows the La-O correlation is stronger than La 2 O 3 ·3B 2 O 3 crystal. The XPS peak shift of the glasses is related to the local structural change from metaborate chain to orthoborate units.…”

Section: Variation Of Local Structure Around La With La 2 O 3 Contentmentioning

confidence: 99%

Composition dependence of local structure in lanthanoborate glasses

Kajinami

Nakamura

Deki

2006

Journal of Alloys and Compounds

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Hochtemperatur-Lanthanborat

Cited by 16 publications

References 1 publication

Pressure-Induced Crystallization and Characterization of the Tin Borate β-SnB₄O₇

Pressure-Induced Crystallization and Characterization of the Tin Borate β-SnB₄O₇

Pr4B10O21: A new composition of rare-earth borates by high-pressure/high-temperature synthesis

Composition dependence of local structure in lanthanoborate glasses

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Hochtemperatur-Lanthanborat

Cited by 16 publications

References 1 publication

Pressure-Induced Crystallization and Characterization of the Tin Borate β-SnB4O7

Pressure-Induced Crystallization and Characterization of the Tin Borate β-SnB4O7

Pr4B10O21: A new composition of rare-earth borates by high-pressure/high-temperature synthesis

Composition dependence of local structure in lanthanoborate glasses

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Product

Resources

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Pressure-Induced Crystallization and Characterization of the Tin Borate β-SnB₄O₇

Pressure-Induced Crystallization and Characterization of the Tin Borate β-SnB₄O₇