Table 3
Thermal conductivities of the species involved.
| Mineral | Thermal conductivity |
| − |
|
|
|
|
| Epsomite | 0.4 (1) |
| Gypsum | 1.3 (2) |
| Halite | 5.4(300.0 /T)1.14 (3) |
| Hematite | 8.39−6.63 × 10-4T (4) |
| Magnetite | 4.23−1.37 × 10-3T (4) |
| Mirabilite | 0.6 (1) |
| Montmorillonite | 0.75 (5) |
| Pyrene | 0.27 (6) |
| Pyrrhotite | 3.5 (2) |
| Saponite | 0.75 (5) |
| Serpentine | (0.404 + 0.000246T)-1 (5) |
Notes. The thermal conductivity of a porous mixture is computed as a geometric mean of the mineral conductivities and respective volume fractions times an exponential term to obtain a dependence on the porosity. In the extreme cases of φ = 48% or φ = 0%, the values of kb = 0.03 and kb = ki = 1.4 as well as kb = 0.015 and kb = ki = 0.73 W m-1 K-1 are obtained at 150 K for the models CIa and CIb, respectively.
Reference. (1) Prieto-Ballesteros & Kargel (2005); (2) Ahrens (1995); (3) Kuhlman (2011); (4) Molgaard & Scmeltzer (1971); (5) Castillo-Rogez (2011); (6) Akbulut et al. (2006).
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