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222534

Sigma-Aldrich

Lithium tetraborate

≥99.9% trace metals basis

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Linear Formula:
Li2B4O7
CAS Number:
12007-60-2
Molecular Weight:
169.12
EC Number:
234-514-3
MDL number:
MFCD00011083
UNSPSC Code:
12352302
PubChem Substance ID:
329752293
NACRES:
NA.55

Quality Level

200

Assay

≥99.9% trace metals basis

form

powder

mp

760-880 °C (lit.)

density

≥0.25 g/mL at 25 °C (lit.)

SMILES string

[Li+].[Li+].[O-]B(OB=O)OB([O-])OB=O

InChI

1S/B4O7.2Li/c5-1-9-3(7)11-4(8)10-2-6;;/q-2;2*+1

InChI key

PSHMSSXLYVAENJ-UHFFFAOYSA-N

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General description

Lithium tetraborate (Li2B4O7) is a piezoelectric material. It can be synthesized from boric acid. Its pyroelectric, piezoelectric and dielectric properties have been evaluated. It is a widely used material in the field of non-linear optics. Its electronic structure has been investigated by x-ray photoelectron spectroscopy (XPS) and quantum mechanical modelling methods.
Lithium tetraborate is a pyroelectric and piezoelectric material with potential applications in pressure sensors and surface acoustic wave (SAW) devices. In the presence of activators such as terbium and cupric ions, it shows thermoluminesence property.

Application

Used as a spectroscopic fluxing agent.

Signal Word

Danger

Hazard Statements

H302,H318,H361fd

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Repr. 2

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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Pyroelectric and piezoelectric properties of lithium tetraborate single crystal.
Bhalla AS, et al.
Japanese Journal of Applied Physics, 24(S2), 727-727 (1985)
Thermoluminescence in lithium tetraborate doped with activators.
Kutomi Y and Takeuchi N.
Journal of Materials Science Letters, 5(1), 51-53 (1986)
Lithium tetraborate: a new temperature-compensated SAW substrate material.
Whatmore RW, et al.
Electronics Letters, 17(1) (1981)
Elastic, piezoelectric, acousto-optic and electro-optic properties of Li2B4O7.
Shiosaki T, et al.
Japanese Journal of Applied Physics, 24(S1), 25-25 (1985)
Electronic structure of lithium tetraborate Li2B4O7 crystals. Cluster calculations and x-ray photoelectron spectroscopy.
Kuznetsov AY, et al.
Physics of the Solid State, 41(1), 48-50 (1999)
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