System: argon/helium
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| 1) argon |
| DECHEMA ID | 39908 |
| Formula | Ar |
| Synonym | R 740 |
| Synonym | frigen 740 |
| Synonym | argon-40 |
| Synonym | refrigerant 740 |
| InChi-Key | XKRFYHLGVUSROY-UHFFFAOYSA-N |
| Registry No. | 7440-37-1 |
| 2) helium |
| DECHEMA ID | 39927 |
| Formula | He |
| Synonym | R 704 |
| Synonym | helium-4 |
| Synonym | o-helium |
| Synonym | p-helium |
| Synonym | refrigerant 704 |
| InChi-Key | SWQJXJOGLNCZEY-UHFFFAOYSA-N |
| Registry No. | 7440-59-7 |
Available physical property data:
| Property | Phase | No. of tables | No. of lines | Data |
| 2nd interaction virial coefficient | gas | 2 | 14 | View |
| 2nd virial coefficient | gas | 2 | 21 | View |
| compressibility factor | gas | 1 | 288 | View |
| critical pressure | - | 2 | 4 | View |
| critical temperature | - | 2 | 4 | View |
| density | gas | 2 | 206 | View |
| diffusion coefficient | gas | 5 | 25 | View |
| enthalpy of mixing | gas | 1 | 9 | View |
| PVT-data | - | 4 | 317 | View |
| sound velocity | gas | 4 | 79 | View |
| surface tension | liquid | 2 | 66 | View |
| thermal conductivity | - | 1 | 422 | View |
| thermal conductivity | liquid | 1 | 25 | View |
| thermal conductivity | gas | 23 | 615 | View |
| vapor-liquid equilibrium, isothermal | - | 14 | 560 | View |
| viscosity, dynamic | gas | 21 | 1085 | View |
| viscosity, dynamic | - | 1 | 319 | View |