Birefringence of the new fluoride borates Ba2Na3[B3O6]2F and Ba7(BO3)4−yF2+3y in the Na, Ba, B//O, F quaternary reciprocal system

T. B. Bekker; V. N. Vedenyapin; A. G. Khamoyan

doi:10.1016/j.materresbull.2017.03.024

Birefringence of the new fluoride borates Ba₂Na₃[B₃O₆]₂F and Ba₇(BO₃)_4−yF_2+3y in the Na, Ba, B//O, F quaternary reciprocal system

T. B. Bekker, V. N. Vedenyapin, A. G. Khamoyan

Laboratory for Experimental Geochemistry and Petrology of the Earth's Mantle

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The birefringence of the new Ba₂Na₃[B₃O₆]₂F (BNBF) (P6₃/m) and Ba₇(BO₃)_4−yF_2+3y (P6₃) phases has been investigated. Coefficients of the Sellmeier equations have been determined. Parallel [B₃O₆]³⁻ rings in the Ba₂Na₃[B₃O₆]₂F structure generate the major anisotropic polarizabilities and produce large birefringence Δn = 0.1097 − 0.0428 from 350 nm to 5 μm, comparable to that of commercial birefringent crystal α-BaB₂O₄. A new flux for growing a high quality BNBF crystal has been proposed. In the measured wavelength range from 266 nm to 1.7 μm noncentrosymmetric phase Ba₇(BO₃)_4−yF_2+3y (y = 0.49) exhibits low birefringence Δn = 0.0111 − 0.0037 which can be accounted for non-coplanar arrangement of the anionic groups in the structure. Low birefringence prevents the use of this crystal for nonlinear optical applications, since phase-matching conditions for second harmonic generation can not be reached.

Original language	English
Pages (from-to)	54-58
Number of pages	5
Journal	Materials Research Bulletin
Volume	91
DOIs	https://doi.org/10.1016/j.materresbull.2017.03.024
Publication status	Published - 1 Jul 2017

Keywords

Barium-sodium fluoride borates
Birefringence
Crystal growth from high-temperature solution
SINGLE-CRYSTALS
Crystal growth from high-temperature
solution
BARIUM METABORATE
GROWTH
BAB2O4-NAF SYSTEM

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10.1016/j.materresbull.2017.03.024

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title = "Birefringence of the new fluoride borates Ba2Na3[B3O6]2F and Ba7(BO3)4−yF2+3y in the Na, Ba, B//O, F quaternary reciprocal system",

abstract = "The birefringence of the new Ba2Na3[B3O6]2F (BNBF) (P63/m) and Ba7(BO3)4−yF2+3y (P63) phases has been investigated. Coefficients of the Sellmeier equations have been determined. Parallel [B3O6]3− rings in the Ba2Na3[B3O6]2F structure generate the major anisotropic polarizabilities and produce large birefringence Δn = 0.1097 − 0.0428 from 350 nm to 5 μm, comparable to that of commercial birefringent crystal α-BaB2O4. A new flux for growing a high quality BNBF crystal has been proposed. In the measured wavelength range from 266 nm to 1.7 μm noncentrosymmetric phase Ba7(BO3)4−yF2+3y (y = 0.49) exhibits low birefringence Δn = 0.0111 − 0.0037 which can be accounted for non-coplanar arrangement of the anionic groups in the structure. Low birefringence prevents the use of this crystal for nonlinear optical applications, since phase-matching conditions for second harmonic generation can not be reached.",

keywords = "Barium-sodium fluoride borates, Birefringence, Crystal growth from high-temperature solution, SINGLE-CRYSTALS, Crystal growth from high-temperature, solution, BARIUM METABORATE, GROWTH, BAB2O4-NAF SYSTEM",

author = "Bekker, {T. B.} and Vedenyapin, {V. N.} and Khamoyan, {A. G.}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

month = jul,

day = "1",

doi = "10.1016/j.materresbull.2017.03.024",

language = "English",

volume = "91",

pages = "54--58",

journal = "Materials Research Bulletin",

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TY - JOUR

T1 - Birefringence of the new fluoride borates Ba2Na3[B3O6]2F and Ba7(BO3)4−yF2+3y in the Na, Ba, B//O, F quaternary reciprocal system

AU - Bekker, T. B.

AU - Vedenyapin, V. N.

AU - Khamoyan, A. G.

PY - 2017/7/1

Y1 - 2017/7/1

N2 - The birefringence of the new Ba2Na3[B3O6]2F (BNBF) (P63/m) and Ba7(BO3)4−yF2+3y (P63) phases has been investigated. Coefficients of the Sellmeier equations have been determined. Parallel [B3O6]3− rings in the Ba2Na3[B3O6]2F structure generate the major anisotropic polarizabilities and produce large birefringence Δn = 0.1097 − 0.0428 from 350 nm to 5 μm, comparable to that of commercial birefringent crystal α-BaB2O4. A new flux for growing a high quality BNBF crystal has been proposed. In the measured wavelength range from 266 nm to 1.7 μm noncentrosymmetric phase Ba7(BO3)4−yF2+3y (y = 0.49) exhibits low birefringence Δn = 0.0111 − 0.0037 which can be accounted for non-coplanar arrangement of the anionic groups in the structure. Low birefringence prevents the use of this crystal for nonlinear optical applications, since phase-matching conditions for second harmonic generation can not be reached.

AB - The birefringence of the new Ba2Na3[B3O6]2F (BNBF) (P63/m) and Ba7(BO3)4−yF2+3y (P63) phases has been investigated. Coefficients of the Sellmeier equations have been determined. Parallel [B3O6]3− rings in the Ba2Na3[B3O6]2F structure generate the major anisotropic polarizabilities and produce large birefringence Δn = 0.1097 − 0.0428 from 350 nm to 5 μm, comparable to that of commercial birefringent crystal α-BaB2O4. A new flux for growing a high quality BNBF crystal has been proposed. In the measured wavelength range from 266 nm to 1.7 μm noncentrosymmetric phase Ba7(BO3)4−yF2+3y (y = 0.49) exhibits low birefringence Δn = 0.0111 − 0.0037 which can be accounted for non-coplanar arrangement of the anionic groups in the structure. Low birefringence prevents the use of this crystal for nonlinear optical applications, since phase-matching conditions for second harmonic generation can not be reached.

KW - Barium-sodium fluoride borates

KW - Birefringence

KW - Crystal growth from high-temperature solution

KW - SINGLE-CRYSTALS

KW - Crystal growth from high-temperature

KW - solution

KW - BARIUM METABORATE

KW - GROWTH

KW - BAB2O4-NAF SYSTEM

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U2 - 10.1016/j.materresbull.2017.03.024

DO - 10.1016/j.materresbull.2017.03.024

M3 - Article

AN - SCOPUS:85016154768

VL - 91

SP - 54

EP - 58

JO - Materials Research Bulletin

JF - Materials Research Bulletin

SN - 0025-5408

ER -

Birefringence of the new fluoride borates Ba₂Na₃[B₃O₆]₂F and Ba₇(BO₃)_4−yF_2+3y in the Na, Ba, B//O, F quaternary reciprocal system

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Keywords

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