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Sim. Verneuill grown
Structure formula: | LaAlO3 | |
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State: | monocrystalline | |
Crystal structure: | rhombohedrial
|
a = 5.377 Å a = 60.13° a = 3.821 Å |
Phase transition: | > 500° C | |
Density: | 6.51 g/cm3 | |
Melting point: | 2180°C | |
Coefficient of expansion: | 10 * 10-6/°C | |
Dielectrical constant (e ): | 20-25 |
Production method: | sim. Verneuill grown (with minimum twins) |
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Orientation: | (100) |
Orientation accuracy: |
£ 0.5° |
Standard size: | 10mm x 10mm x thickness 1mm or 0.5mm |
Tolerance of length: |
± 0.10mm (typical better ± 0.05mm) |
Tolerance of thickness: |
± 0.05mm |
Parallelness: |
£ 0.02mm |
Polishing: | standard: one side |
Flatness: |
l/2 |
Roughness of surface: | Rmax £ 15nm (average Ra = 3nm) |
Scratches: | none |
Surface quality: | with light microscope without defects |