Lithium tantalate (data page)

This page provides supplementary chemical data on lithium tantalate.

Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions.

Structure and properties

Structure and properties
Index of refraction, nD	?
Abbe number	?
Dielectric constant, ε11	51 ε0 (measured at constant stress)
Dielectric constant, ε33	45 ε0 (measured at constant stress)
Dielectric constant, ε11	38.3 ε0 (measured at constant strain)
Dielectric constant, ε33	46.2 ε0 (measured at constant strain)
Piezoelectric constant, d15	26 pC/N
Piezoelectric constant, d22	7 pC/N
Piezoelectric constant, d31	-2 pC/N
Piezoelectric constant, d33	8 pC/N
Bond strength	?
Bond length	?
Bond angle	?
Magnetic susceptibility	?

Thermodynamic properties

Phase behavior
Triple point	? K (? °C), ? Pa
Critical point	? K (? °C), ? Pa
Thermal Expansion	2x10−6 K−1 (z), 16x10−6 K−1 (x,y)
Curie temperature	~950 K (~680 °C) (~1220 °F)
Std enthalpy change of fusion, ΔfusHo	? kJ/mol
Std entropy change of fusion, ΔfusSo	? J/(mol·K)
Std enthalpy change of vaporization, ΔvapHo	? kJ/mol
Std entropy change of vaporization, ΔvapSo	? J/(mol·K)
Solid properties
Std enthalpy change of formation, ΔfHosolid	? kJ/mol
Standard molar entropy, Sosolid	? J/(mol K)
Heat capacity, cp	? J/(mol K)
Liquid properties
Std enthalpy change of formation, ΔfHoliquid	? kJ/mol
Standard molar entropy, Soliquid	? J/(mol K)
Heat capacity, cp	? J/(mol K)
Gas properties
Std enthalpy change of formation, ΔfHogas	? kJ/mol
Standard molar entropy, Sogas	? J/(mol K)
Heat capacity, cp	? J/(mol K)

Spectral data

UV-Vis
λmax	? nm
Extinction coefficient, ε	?
IR
Major absorption bands	? cm−1
NMR
Proton NMR
Carbon-13 NMR
Other NMR data
MS
Masses of main fragments

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• Except where noted otherwise, data relate to Standard temperature and pressure.
• Reliability of data general note.

References

• Yue, Wang; Yi-jian, Jiang (2003). "Crystal orientation dependence of piezoelectric properties in LiNbO₃ and LiTaO₃". Optical Materials. 23 (1–2). Elsevier BV: 403–408. doi:10.1016/s0925-3467(02)00328-2. ISSN 0925-3467.
• Smith, R. T. (1967). "Elastic, Piezoelectric, and Dielectric Properties of Lithium Tantalate". Applied Physics Letters. 11 (5). AIP Publishing: 146–148. doi:10.1063/1.1755072. ISSN 0003-6951.