Lanthanum Aluminate
LaAlO3

Crystal properties

Crystal growth method

Czochralski method

 

Crystal growth orientation

(100)

Maximum size

Type a)
Up to Æ 3 inch

Crystallographic properties

Structural typ

Distorted Perovskite

Crystallographic structure

Rhombohedral
a= 5.357 Å ( x = 60°6')

Perovskite (only for calculations)
a = 3.863 Å ( x = 90°5')

Twinning structure

Orthogonal twin planes along (100)

Colour

Colourless to very light brown

Physical properties

Density

6.52 g/m3

Melting poin

2080 °C

Hardness

5.9 (Mohs)

Thermal expansion coefficient

1.0 * 10-5 K-1

Dielectric constant

25

Dielectric loss tangent

3* 10-4 at 300 °K
6 * 10-5 at 77 °K

X-ray properties

Orientation

Type a) (100), (110), (111)