Material Specification for La:21; [La(Sr)-Cu-O]
Process: Crystal Growth
Notes: "This work is devoted to studying... La2-xSrxCuO4 compounds. ... We have prepared untwinned orthorhombic crystals of La2CuO4 with help of the uniaxial compression of the initial crystals in [100] or [010] directions." No additional processing details were noted.
Formula: La1.87Sr0.13CuO4
Informal Name: La:21
Chemical Family: La(Sr)-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Density (mass) for La:21; [La(Sr)-Cu-O]
| Temperature (K) |
Density (g cm-3) |
| 300 |
6.993 |
Measurement Method: Unknown density method
No measurement details were noted.
Cautions: Unevaluated Data
Debye Temperature for La:21; [La(Sr)-Cu-O]
| Debye Temperature (K) |
| 402 |
Measurement Method: Ultrasonic method
The authors cite N.G. Burma et al., Fiz. Nizk. Temp., Vol. 18, 247 (1992), and summarize the procedure as follows. "...we have measured sound velocities both in the principal and in... arbitrary crystallography directions. The new variant of phase method was used, (and) as a result accuracy of data obtained is not worse than 0.5%. Also we have calculated the Debye temperature of the investigated crystals by averaging of the inverse cubes of the all normal mode velocities." No additional measurement details were noted.
Cautions: Unevaluated Data
Elasticity Tensor for La:21; [La(Sr)-Cu-O]
| C11 = | 259.4 |
| C12 = | 70.7 |
| C13 = | 97.5 |
| C22 = | |
| C23 = | |
| C33 = | 245 |
| C44 = | 63.4 |
| C55 = | |
| C66 = | 52.4 |
Measurement Method: Ultrasonic method
The authors cite N.G. Burma et al., Fiz. Nizk. Temp., Vol. 18, 247 (1992), and summarize the procedure as follows. "...we have measured sound velocities both in the principal and in... arbitrary crystallography directions. The new variant of phase method was used, (and) as a result accuracy of data obtained is not worse than 0.5%. Also we have calculated the Debye temperature of the investigated crystals by averaging of the inverse cubes of the all normal mode velocities." No additional measurement details were noted.
Cautions: Unevaluated Data
The authors indicate that a phase transition occurs for this sample.
The structural phase is tetragonal for T < 150 K and orthorhombic for T > 150 K.
Material Specification for La:21; [La-Cu-O]
Process: Crystal Growth
Notes: "This work is devoted to studying... La2-xSrxCuO4 compounds. ... We have prepared untwinned orthorhombic crystals of La2CuO4 with help of the uniaxial compression of the initial crystals in [100] or [010] directions." No additional processing details were noted.
Formula: La2CuO4
Informal Name: La:21
Chemical Family: La-Cu-O
Chemical Class: Oxide
Structure Type: Single Crystal
Manufacturer: In House
Commercial Name: In House
Production Date:
Lot Number:
Production Form:
Density (mass) for La:21; [La-Cu-O]
| Temperature (K) |
Density (g cm-3) |
| 77 |
7.07 |
Measurement Method: Unknown density method
No measurement details were noted.
Cautions: Unevaluated Data
Debye Temperature for La:21; [La-Cu-O]
| Debye Temperature (K) |
| 433 |
Measurement Method: Ultrasonic method
The authors cite N.G. Burma et al., Fiz. Nizk. Temp., Vol. 18, 247 (1992), and summarize the procedure as follows. "...we have measured sound velocities both in the principal and in... arbitrary crystallography directions. The new variant of phase method was used, (and) as a result accuracy of data obtained is not worse than 0.5%. Also we have calculated the Debye temperature of the investigated crystals by averaging of the inverse cubes of the all normal mode velocities." No additional measurement details were noted.
Cautions: Unevaluated Data
Elasticity Tensor for La:21; [La-Cu-O]
| C11 = | 229.8 |
| C12 = | 98.4 |
| C13 = | 101.7 |
| C22 = | 156.1 |
| C23 = | 92.2 |
| C33 = | 275.5 |
| C44 = | 74.6 |
| C55 = | 63.8 |
| C66 = | 102.1 |
Measurement Method: Ultrasonic method
The authors cite N.G. Burma et al., Fiz. Nizk. Temp., Vol. 18, 247 (1992), and summarize the procedure as follows. "...we have measured sound velocities both in the principal and in... arbitrary crystallography directions. The new variant of phase method was used, (and) as a result accuracy of data obtained is not worse than 0.5%. Also we have calculated the Debye temperature of the investigated crystals by averaging of the inverse cubes of the all normal mode velocities." No additional measurement details were noted.
Cautions: Unevaluated Data
