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Borates—crystal structures of prospective nonlinear optical materials : High anisotropy of the thermal expansion caused by anharmonic atomic vibrations. / Bubnova, Rimma; Volkov, Sergey; Albert, Barbara; Filatov, Stanislav.

In: Crystals, Vol. 7, No. 3, 93, 22.03.2017.

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@article{0acceaaa1cf649a5956327dc4d938b51,
title = "Borates—crystal structures of prospective nonlinear optical materials: High anisotropy of the thermal expansion caused by anharmonic atomic vibrations",
abstract = "In the present study the thermal structure evolution is reviewed for known nonlinear optical borates such as β-BaB2O4, LiB3O5, CsLiB6O10, Li2B4O7, K2Al2B2O7, and α-BiB3O6, based on single-crystal and powder X-ray diffraction data collected over wide temperature ranges. Temperature-dependent measurements of further borates are presented for the first time: α-BaB2O4 (295-673 K), β-BaB2O4 (98-693 K), LiB3O5 (98-650 K) and K2Al2B2O7 (98-348 K). In addition to the established criteria for nonlinear optical (NLO) properties of crystals, here the role of the anisotropy and anharmonicity of the thermal vibrations of atoms is analysed as well as changes in their coordination spheres and the anisotropy of the thermal expansion of the crystal structure. Non-centrosymmetric borates, especially those that have NLO properties, often show distinct anisotropies for each cation in comparison to centrosymmetric borates. All considered NLO borates contain BO3 triangles, which are the principal cause of the strong anisotropy of the thermal expansion.",
keywords = "Anisotropic and anharmonic atomic vibrations, Crystal structures at low and high temperatures, Low- and high-temperature single-crystal and powder x-ray diffraction, NLO borates, Rigid boron-oxygen groups, Thermal expansion",
author = "Rimma Bubnova and Sergey Volkov and Barbara Albert and Stanislav Filatov",
year = "2017",
month = mar,
day = "22",
doi = "10.3390/cryst7030093",
language = "English",
volume = "7",
journal = "Liquid Crystals",
issn = "0267-8292",
publisher = "Taylor & Francis",
number = "3",

}

RIS

TY - JOUR

T1 - Borates—crystal structures of prospective nonlinear optical materials

T2 - High anisotropy of the thermal expansion caused by anharmonic atomic vibrations

AU - Bubnova, Rimma

AU - Volkov, Sergey

AU - Albert, Barbara

AU - Filatov, Stanislav

PY - 2017/3/22

Y1 - 2017/3/22

N2 - In the present study the thermal structure evolution is reviewed for known nonlinear optical borates such as β-BaB2O4, LiB3O5, CsLiB6O10, Li2B4O7, K2Al2B2O7, and α-BiB3O6, based on single-crystal and powder X-ray diffraction data collected over wide temperature ranges. Temperature-dependent measurements of further borates are presented for the first time: α-BaB2O4 (295-673 K), β-BaB2O4 (98-693 K), LiB3O5 (98-650 K) and K2Al2B2O7 (98-348 K). In addition to the established criteria for nonlinear optical (NLO) properties of crystals, here the role of the anisotropy and anharmonicity of the thermal vibrations of atoms is analysed as well as changes in their coordination spheres and the anisotropy of the thermal expansion of the crystal structure. Non-centrosymmetric borates, especially those that have NLO properties, often show distinct anisotropies for each cation in comparison to centrosymmetric borates. All considered NLO borates contain BO3 triangles, which are the principal cause of the strong anisotropy of the thermal expansion.

AB - In the present study the thermal structure evolution is reviewed for known nonlinear optical borates such as β-BaB2O4, LiB3O5, CsLiB6O10, Li2B4O7, K2Al2B2O7, and α-BiB3O6, based on single-crystal and powder X-ray diffraction data collected over wide temperature ranges. Temperature-dependent measurements of further borates are presented for the first time: α-BaB2O4 (295-673 K), β-BaB2O4 (98-693 K), LiB3O5 (98-650 K) and K2Al2B2O7 (98-348 K). In addition to the established criteria for nonlinear optical (NLO) properties of crystals, here the role of the anisotropy and anharmonicity of the thermal vibrations of atoms is analysed as well as changes in their coordination spheres and the anisotropy of the thermal expansion of the crystal structure. Non-centrosymmetric borates, especially those that have NLO properties, often show distinct anisotropies for each cation in comparison to centrosymmetric borates. All considered NLO borates contain BO3 triangles, which are the principal cause of the strong anisotropy of the thermal expansion.

KW - Anisotropic and anharmonic atomic vibrations

KW - Crystal structures at low and high temperatures

KW - Low- and high-temperature single-crystal and powder x-ray diffraction

KW - NLO borates

KW - Rigid boron-oxygen groups

KW - Thermal expansion

UR - http://www.scopus.com/inward/record.url?scp=85016112349&partnerID=8YFLogxK

U2 - 10.3390/cryst7030093

DO - 10.3390/cryst7030093

M3 - Review article

AN - SCOPUS:85016112349

VL - 7

JO - Liquid Crystals

JF - Liquid Crystals

SN - 0267-8292

IS - 3

M1 - 93

ER -

ID: 9460676