Temperature Dependence of the Far-Infrared Reflectivity of Magnesium Stannide
R. Geick, W. J. Hakel, C. H. Perry
The reflectivity of pure samples of magnesium stannide has been measured in the infrared region from 50 to 370 cm-1 at temperatures from 100 to 600 °K. The reflection spectra have been analyzed by means of a fit with a classical dispersion formula including Drude terms for the free-carrier effects. At low temperatures the influence of the lattice dispersion on the reflectivity dominates, while at high temperatures the free-carrier effects dominate. The electrical properties of Mg2Sn in the intrinsic conduction range as determined from the reflectivity are in good agreement with the data obtained by Busch and Winkler from electrical measurements. © 1966 The American Physical Society.
Materials
Curve 1
Temperature, K: 100
Wavelength Range, µm: 27.0-200
Geometry θ θ' ω: 15° 15°
Composition (weight percent), Specifications and Remarks: Pure; data extracted from smooth curve.
Source for Curve 1
Data originally published at 10.1103/PhysRev.148.824. Tabulated data extracted from Y. S. Touloukian and D. P. DeWitt, *Thermal Radiative Properties: Nonmetallic solids*, Thermophysical Properties of Matter - The TPRC Data Series, Volume 8, IFI/Plenum, New York, 1972; table 487, curve 6. Digital version served at EKHI (https://thermomat.ehu.eus/ekhi).
Data Table for Curve 1
| Wavelength / 𝜇m | Reflectance / |
|---|---|
| 27.0 | 0.334 |
| 27.8 | 0.325 |
| 28.5 | 0.325 |
| 29.2 | 0.316 |
| 30.2 | 0.316 |
| 31.2 | 0.306 |
| 32.3 | 0.307 |
| 33.3 | 0.294 |
| 34.2 | 0.288 |
| 35.6 | 0.275 |
| 36.9 | 0.25 |
| 38.5 | 0.222 |
| 39.8 | 0.176 |
| 41.3 | 0.082 |
| 42.2 | 0.061 |
| 43.3 | 0.437 |
| 44.2 | 0.732 |
| 45.2 | 0.838 |
| 47.4 | 0.913 |
| 50.0 | 0.918 |
| 51.0 | 0.889 |
| 52.1 | 0.782 |
| 53.5 | 0.686 |
| 55.2 | 0.63 |
| 58.5 | 0.567 |
| 62.1 | 0.537 |
| 66.7 | 0.515 |
| 70.4 | 0.496 |
| 76.3 | 0.487 |
| 82.6 | 0.476 |
| 89.6 | 0.47 |
| 100.0 | 0.467 |
| 110.0 | 0.458 |
| 127.0 | 0.455 |
| 143.0 | 0.455 |
| 167.0 | 0.45 |
| 200.0 | 0.45 |
Curve 2
Temperature, K: 295
Wavelength Range, µm: 27.0-200
Geometry θ θ' ω: 15° 15°
Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Source for Curve 2
Data originally published at 10.1103/PhysRev.148.824. Tabulated data extracted from Y. S. Touloukian and D. P. DeWitt, *Thermal Radiative Properties: Nonmetallic solids*, Thermophysical Properties of Matter - The TPRC Data Series, Volume 8, IFI/Plenum, New York, 1972; table 487, curve 7. Digital version served at EKHI (https://thermomat.ehu.eus/ekhi).
Data Table for Curve 2
| Wavelength / 𝜇m | Reflectance / |
|---|---|
| 27.0 | 0.318 |
| 27.7 | 0.318 |
| 28.5 | 0.31 |
| 29.3 | 0.31 |
| 30.2 | 0.304 |
| 31.2 | 0.299 |
| 32.3 | 0.292 |
| 33.3 | 0.281 |
| 34.5 | 0.265 |
| 35.7 | 0.256 |
| 37.0 | 0.231 |
| 38.5 | 0.197 |
| 40.2 | 0.162 |
| 41.5 | 0.15 |
| 42.6 | 0.196 |
| 43.3 | 0.337 |
| 44.4 | 0.526 |
| 45.5 | 0.672 |
| 46.3 | 0.756 |
| 47.6 | 0.827 |
| 50.0 | 0.871 |
| 52.4 | 0.84 |
| 53.8 | 0.731 |
| 55.2 | 0.663 |
| 59.2 | 0.588 |
| 62.1 | 0.535 |
| 66.7 | 0.508 |
| 70.9 | 0.484 |
| 76.3 | 0.47 |
| 83.3 | 0.466 |
| 90.1 | 0.46 |
| 100.0 | 0.45 |
| 112.0 | 0.45 |
| 125.0 | 0.45 |
| 145.0 | 0.466 |
| 167.0 | 0.474 |
| 200.0 | 0.493 |
Curve 3
Temperature, K: 330
Wavelength Range, µm: 27.0-200
Geometry θ θ' ω: 15° 15°
Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Source for Curve 3
Data originally published at 10.1103/PhysRev.148.824. Tabulated data extracted from Y. S. Touloukian and D. P. DeWitt, *Thermal Radiative Properties: Nonmetallic solids*, Thermophysical Properties of Matter - The TPRC Data Series, Volume 8, IFI/Plenum, New York, 1972; table 487, curve 8. Digital version served at EKHI (https://thermomat.ehu.eus/ekhi).
Data Table for Curve 3
| Wavelength / 𝜇m | Reflectance / |
|---|---|
| 27.0 | 0.3 |
| 27.8 | 0.304 |
| 28.6 | 0.296 |
| 29.3 | 0.29 |
| 30.2 | 0.291 |
| 31.2 | 0.281 |
| 32.2 | 0.272 |
| 33.3 | 0.258 |
| 34.4 | 0.253 |
| 35.7 | 0.246 |
| 37.0 | 0.233 |
| 38.5 | 0.221 |
| 39.8 | 0.22 |
| 41.5 | 0.283 |
| 42.6 | 0.358 |
| 43.5 | 0.47 |
| 44.2 | 0.561 |
| 45.5 | 0.673 |
| 46.5 | 0.729 |
| 47.6 | 0.807 |
| 50.0 | 0.869 |
| 52.6 | 0.841 |
| 53.8 | 0.748 |
| 55.2 | 0.67 |
| 59.2 | 0.582 |
| 62.1 | 0.539 |
| 66.2 | 0.505 |
| 70.9 | 0.49 |
| 76.3 | 0.477 |
| 83.3 | 0.477 |
| 90.1 | 0.48 |
| 100.0 | 0.484 |
| 111.0 | 0.494 |
| 125.0 | 0.511 |
| 143.0 | 0.536 |
| 169.0 | 0.56 |
| 200.0 | 0.595 |
Curve 4
Temperature, K: 360
Wavelength Range, µm: 27.0-204
Geometry θ θ' ω: 15° 15°
Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Source for Curve 4
Data originally published at 10.1103/PhysRev.148.824. Tabulated data extracted from Y. S. Touloukian and D. P. DeWitt, *Thermal Radiative Properties: Nonmetallic solids*, Thermophysical Properties of Matter - The TPRC Data Series, Volume 8, IFI/Plenum, New York, 1972; table 487, curve 9. Digital version served at EKHI (https://thermomat.ehu.eus/ekhi).
Data Table for Curve 4
| Wavelength / 𝜇m | Reflectance / |
|---|---|
| 27.0 | 0.288 |
| 27.8 | 0.288 |
| 28.5 | 0.284 |
| 29.4 | 0.282 |
| 30.3 | 0.281 |
| 31.3 | 0.278 |
| 32.3 | 0.275 |
| 33.4 | 0.275 |
| 34.4 | 0.271 |
| 35.7 | 0.271 |
| 37.0 | 0.271 |
| 38.5 | 0.296 |
| 39.8 | 0.324 |
| 41.7 | 0.403 |
| 43.5 | 0.522 |
| 45.5 | 0.646 |
| 47.6 | 0.77 |
| 50.0 | 0.848 |
| 52.1 | 0.841 |
| 53.8 | 0.762 |
| 55.6 | 0.687 |
| 58.8 | 0.591 |
| 62.5 | 0.542 |
| 66.7 | 0.518 |
| 71.4 | 0.508 |
| 76.9 | 0.508 |
| 83.3 | 0.508 |
| 90.1 | 0.52 |
| 100.0 | 0.535 |
| 110.0 | 0.55 |
| 123.0 | 0.581 |
| 143.0 | 0.6 |
| 167.0 | 0.628 |
| 204.0 | 0.656 |
Curve 5
Temperature, K: 420
Wavelength Range, µm: 27.0-200
Geometry θ θ' ω: 15° 15°
Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Source for Curve 5
Data originally published at 10.1103/PhysRev.148.824. Tabulated data extracted from Y. S. Touloukian and D. P. DeWitt, *Thermal Radiative Properties: Nonmetallic solids*, Thermophysical Properties of Matter - The TPRC Data Series, Volume 8, IFI/Plenum, New York, 1972; table 487, curve 10. Digital version served at EKHI (https://thermomat.ehu.eus/ekhi).
Data Table for Curve 5
| Wavelength / 𝜇m | Reflectance / |
|---|---|
| 27.0 | 0.312 |
| 27.8 | 0.319 |
| 28.6 | 0.323 |
| 29.4 | 0.334 |
| 30.3 | 0.347 |
| 31.2 | 0.362 |
| 32.2 | 0.371 |
| 33.4 | 0.401 |
| 34.5 | 0.416 |
| 35.7 | 0.437 |
| 37.0 | 0.465 |
| 38.6 | 0.502 |
| 40.2 | 0.54 |
| 41.8 | 0.58 |
| 43.3 | 0.62 |
| 45.5 | 0.689 |
| 47.6 | 0.748 |
| 49.8 | 0.82 |
| 52.4 | 0.82 |
| 55.6 | 0.713 |
| 58.5 | 0.625 |
| 61.7 | 0.589 |
| 66.7 | 0.579 |
| 71.4 | 0.591 |
| 76.3 | 0.599 |
| 83.3 | 0.616 |
| 90.1 | 0.63 |
| 100.0 | 0.649 |
| 111.0 | 0.677 |
| 125.0 | 0.699 |
| 143.0 | 0.716 |
| 167.0 | 0.739 |
| 200.0 | 0.758 |
Curve 6
Temperature, K: 520
Wavelength Range, µm: 27.1-196
Geometry θ θ' ω: 15° 15°
Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Source for Curve 6
Data originally published at 10.1103/PhysRev.148.824. Tabulated data extracted from Y. S. Touloukian and D. P. DeWitt, *Thermal Radiative Properties: Nonmetallic solids*, Thermophysical Properties of Matter - The TPRC Data Series, Volume 8, IFI/Plenum, New York, 1972; table 487, curve 11. Digital version served at EKHI (https://thermomat.ehu.eus/ekhi).
Data Table for Curve 6
| Wavelength / 𝜇m | Reflectance / |
|---|---|
| 27.1 | 0.517 |
| 27.8 | 0.543 |
| 28.6 | 0.543 |
| 29.4 | 0.563 |
| 30.3 | 0.574 |
| 31.2 | 0.583 |
| 32.4 | 0.604 |
| 33.2 | 0.605 |
| 34.4 | 0.62 |
| 35.7 | 0.638 |
| 37.0 | 0.651 |
| 38.3 | 0.666 |
| 40.0 | 0.685 |
| 41.5 | 0.698 |
| 43.7 | 0.718 |
| 45.2 | 0.734 |
| 47.6 | 0.768 |
| 50.3 | 0.798 |
| 52.6 | 0.82 |
| 55.2 | 0.779 |
| 58.5 | 0.71 |
| 62.9 | 0.685 |
| 67.1 | 0.695 |
| 71.4 | 0.704 |
| 77.5 | 0.718 |
| 83.3 | 0.732 |
| 90.1 | 0.739 |
| 99.0 | 0.759 |
| 111 | 0.773 |
| 127 | 0.776 |
| 143 | 0.801 |
| 166 | 0.814 |
| 196 | 0.829 |
Curve 7
Temperature, K: 625
Wavelength Range, µm: 27.0-200
Geometry θ θ' ω: 15° 15°
Composition (weight percent), Specifications and Remarks: Above specimen and conditions.
Source for Curve 7
Data originally published at 10.1103/PhysRev.148.824. Tabulated data extracted from Y. S. Touloukian and D. P. DeWitt, *Thermal Radiative Properties: Nonmetallic solids*, Thermophysical Properties of Matter - The TPRC Data Series, Volume 8, IFI/Plenum, New York, 1972; table 487, curve 12. Digital version served at EKHI (https://thermomat.ehu.eus/ekhi).
Data Table for Curve 7
| Wavelength / 𝜇m | Reflectance / |
|---|---|
| 27.0 | 0.637 |
| 27.8 | 0.643 |
| 28.7 | 0.65 |
| 29.3 | 0.653 |
| 30.3 | 0.663 |
| 31.2 | 0.672 |
| 32.3 | 0.678 |
| 33.3 | 0.696 |
| 34.5 | 0.699 |
| 35.7 | 0.709 |
| 37.0 | 0.718 |
| 38.5 | 0.724 |
| 40.2 | 0.737 |
| 41.5 | 0.74 |
| 43.3 | 0.755 |
| 45.7 | 0.78 |
| 47.4 | 0.78 |
| 49.8 | 0.796 |
| 52.6 | 0.811 |
| 55.6 | 0.802 |
| 58.8 | 0.765 |
| 62.1 | 0.755 |
| 66.2 | 0.755 |
| 71.9 | 0.755 |
| 77.5 | 0.765 |
| 83.3 | 0.774 |
| 90.1 | 0.793 |
| 101.0 | 0.799 |
| 111.0 | 0.817 |
| 128.0 | 0.824 |
| 143.0 | 0.831 |
| 167.0 | 0.845 |
| 200.0 | 0.855 |