Layer
Name
Layer #1
Physical characteristics
Type of layer
granular
Thickness
2.0  ± 1.0  mm
Texture
loose granular
Type of porosity
particulate
Formation mode
sublimation of a ice-dust mixture
Temperature
173.0  K
Comments
The layer was produced in-situ after sublimation of water ice particles containing inclusions of ammonium salt and pyrrhotite grains.
Number
2
Arrangement
homogeneous mixing
Materials
  Name Arrangement Mass (g) Mass fraction Abundance comments
Pyrrhotite sub-micrometer size grains 0.77 This abundance value is a lower value, because some amount of ammonium salt (but probably very little) may have sublimated with the water ice during preparation of this sublimate residue. Massic abundance superior or equal to about 77 wt%. Volumetric abundance equal or superior to about 56 vol%.
Ammonium sulfate 0.23 This abundance value is an upper value, because some amount of ammonium salt (but probably very little) may have sublimated with the water ice during preparation of this sublimate residue. Massic abundance lower or equal to about 23 wt%. Volumetric abundance lower or equal to about 44 vol%.