Abstract
The lattice spacing of aluminium has been measured as a function of temperature by means of a high-temperature Debye-Scherrer X-ray camera. The coefficient of expansion has been deduced. The results are:
| Temp. | 0° | 100° | 200° | 300° | 400° | 500° | 600° | 650° C. |
|---|---|---|---|---|---|---|---|---|
| d | 4.0391 | 4.0486 | 4.0592 | 4.0701 | 4.0820 | 4.0947 | 4.1087 | 4.1162 |
| 106 α | 22.0 | 25.4 | 26.5 | 27.8 | 29.9 | 32.5 | 35.5 | 37.2 |
The systematic and random errors in d are each about 0.0001 A., the error in α from 1 to 2 per cent.