Major capability parameter Crystal structure M4 Growth method Czochralski method Unit cell constant a=3.756Å   c=12.63 Å Melt point（℃） 1650 Density 5.92（g/cm3） Hardness 6-6.5（mohs） Dielectric constants ε=16.8 Size 10x3，10x5，10x10，15x15，，20x15，20x20， Ф15,Ф20，Ф1″，Ф2″,Ф2.6″ Thickness 0.5mm，1.0mm Polishing Single or double Crystal Orientation ＜001＞   redirection precision ±0.5° Redirection the edge: 2°（special in 1°） Angle of crystalline Special size and orientation are available upon request Ra: ≤5Å（5µm×5µm） Pack 100 clean bag，1000 exactly clean bag

The strontium lanthanum aluminate crystal has no twinning and phase transition from the melting point to the low temperature.

 It has the same structure as the high-temperature superconductor YBCO