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| Crystal | Asymmetric angle (°)† | Optimum energy / wavelength (keV) / (Å)‡ |
|---|---|---|
| Ge(111) | 7.06 | 12.7 / 0.98 |
| 7.61 | 11.8 / 1.05 | |
| 13.05 | 7.0 / 1.78 | |
| Ge(220) | 8.15 | 18.0 / 0.69 |
The asymmetric angles are the actual values, not the designed ones.
It may be usable but the beam focusing and monochromaticity become incompatible at energy/wavelength deviating from this optimum.
