Langasite
La3Ga5SiO14
Chemical name
Langasite
Mineral name
Langasite
Chemical formula
La3Ga5SiO14
Melting point [°C]
1475
Crystal system
hexagonal/ trigonal
Space Group
P321
Unit cell
a [Å]:8,1783
b [Å]:8,1783
c [Å]:5,1014
Density [g/cm3]
5.74
Piezoelectric crystals
 
Q(m)
50
electromech. Coupling factor (BAW) K^2(emc) [%]
15.8
frequency spacing Δf [%]
0.9
temperature frequency coefficient [*10^(-6) / °C]
1.6
SAW velocity V(ef) [m/s]
(0°, 140°, 22.5°) 2742
K^2(emc) (SAW) [%]
0.32
a(2) [10^(-8)/°C ^2]
-7.8
T(T0) (Temp. Coeff.) [°C]
25
M, degr. (Power Flow Angle)
52