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====Fines in Vacuum====

In a vacuum, if INERTIA is provided (at T_user) and INERTIA < TI_CO, the interface assumes a T^3 trend for the conductivity. First, the interface derives the thermal conductivity at T_user:

 COND = INERTIA^2/(SPEC_HEAT*(1.-Por1)*Density_bulk)

...using parameters provided by the user, or default material properties based on the planetary body. 

Then the thermal conductivity coefficients are derived from a polynomial fit between 10 and 500K and follows a trend described in [Hayne REF]:

 k = COND*(1+2.7*((T-T_user)/350.)^3)

In this case, the user should specify:

:LKofT = "T"
:T_user
:INERTIA
:Mat1 / DENS / Por1 

In the one point mode, this temperature-dependence trend can be indicated with k_style = "Moon". Note that this is a risky behavior, because high thermal inertia typically doesn't follow this trend.

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