Lanthanum Aluminate ( LaAlO3 )

Lanthanum Aluminate LaAlO3 Lanthanum  
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
 
graph    
X-ray properties    
Orientation Type a) (100), (110), (111)