Lithium tantalate (data page)

This page provides supplementary chemical data on lithium tantalate.

Structure and properties
Index of refraction, n_D	?
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	?

Phase behavior
Triple point	? K (? °C), ? Pa
Critical point	? K (? °C), ? Pa
Thermal Expansion	2×10⁻⁶ K⁻¹ (z), 16×10⁻⁶ K⁻¹ (x,y)
Curie temperature	~950 K (~680 °C) (~1220 °F)
Std enthalpy change of fusion, Δ_fusH^o	? kJ/mol
Std entropy change of fusion, Δ_fusS^o	? J/(mol·K)
Std enthalpy change of vaporization, Δ_vapH^o	? kJ/mol
Std entropy change of vaporization, Δ_vapS^o	? J/(mol·K)
Solid properties
Std enthalpy change of formation, Δ_fH^o_solid	? kJ/mol
Standard molar entropy, S^o_solid	? J/(mol K)
Heat capacity, c_p	? J/(mol K)
Liquid properties
Std enthalpy change of formation, Δ_fH^o_liquid	? kJ/mol
Standard molar entropy, S^o_liquid	? J/(mol K)
Heat capacity, c_p	? J/(mol K)
Gas properties
Std enthalpy change of formation, Δ_fH^o_gas	? kJ/mol
Standard molar entropy, S^o_gas	? J/(mol K)
Heat capacity, c_p	? J/(mol K)

Structure and properties