Table 2
Physical parameter values used for the models.
| Quantity | Symbol | Unit | Value |
| Metal mass fraction | x Fe | % | 21.9 |
| Silicate mass fraction | x Si | % | 78.1 |
| Initial abundance of 26Al | [26Al/27Al]0 | – | 5.0 × 10-5 |
| Initial abundance of 60Fe | [60Fe/56Fe]0 | – | 1.0 × 10-8 |
| Average intrinsic density |
|
kg m-3 | 3740 |
| Bulk thermal conductivity | k | W m-1 K-1 | 4.36 |
| Specific heat capacity | c p | J kg-1 K-1 | (1) |
| Gas constant | ℛ | kJ mol-1 K-1 | 0.00831 |
| Creep activation energy | E | kJ mol-1 | 356 |
| Grain size | b | m | 10-6 |
| Pre-factor | B | m3 Pa−3/2 s-1 | 1.26 × 10-18 |
| Grain size exponent | m | – | 3 |
| Stress exponent | n | – | 3/2 |
Notes. The density and the thermal conductivity values are stated for φ = 0. For the thermal conductivity of a porous assemblage the exponential fit from Krause et al. (2011) is used, which displays a variation of two orders of magnitude for porosities between any value of φ0 and 0. For E and b the values from the table are used if not stated otherwise. For the specific heat capacity a temperature dependent fit from Yomogida & Matsui (1984) is adopted.
Reference. (1) Yomogida & Matsui (1984).
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