Material Ti-Magnetite | SSHADE

Experiment Vis-NIR reflectance spectra of JSC Mars 1 or Dark basalt powders pure, and/or mixed with H2O ice (with ice particles ~4 or ~67 µm, or in a slab), and/or covered with H2O frost

Sub-Experiment Mineral powders

Sub-Experiment JSC Mars-1

Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 (original powder) at 293 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 (grains > 400 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 (grains 200-400 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 (grains 100-200 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 (grains < 100 µm) at 293 K

Sub-Experiment Dark basalt

Spectrum Vis-NIR reflectance spectrum of Dark basalt (original powder) at 293 K Spectrum Vis-NIR reflectance spectrum of Dark basalt (grains > 400 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of Dark basalt (grains 200-400 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of Dark basalt (grains 100-200 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of Dark basalt (grains < 100 µm) at 293 K

Sub-Experiment Water frost on JSC Mars-1

Sub-Experiment Water frost on grains > 400 µm

Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 (grains > 400 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of Water frost (~14 µm thick) on JSC Mars-1 (grains > 400 µm) at ~110 K Spectrum Vis-NIR reflectance spectrum of Water frost (~33 µm thick) on JSC Mars-1 (grains > 400 µm) at ~110 K Spectrum Vis-NIR reflectance spectrum of Water frost (~50 µm thick) on JSC Mars-1 (grains > 400 µm) at ~110 K

Sub-Experiment Water frost on grains < 100 µm

Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 (grains < 100 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of Water frost (~14 µm thick) on JSC Mars-1 (grains < 100 µm) at ~110 K Spectrum Vis-NIR reflectance spectrum of Water frost (~33 µm thick) on JSC Mars-1 (grains < 100 µm) at ~110 K Spectrum Vis-NIR reflectance spectrum of Water frost (~50 µm thick) on JSC Mars-1 (grains < 100 µm) at ~110 K

Sub-Experiment Water frost on Dark basalt

Sub-Experiment Water frost on grains > 400 µm

Spectrum Vis-NIR reflectance spectrum of Dark basalt (grains > 400 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of Water frost (~13 µm thick) on Dark basalt (grains > 400 µm) at ~100 K Spectrum Vis-NIR reflectance spectrum of Water frost (~52 µm thick) on Dark basalt (grains > 400 µm) at ~100 K Spectrum Vis-NIR reflectance spectrum of Water frost (~75 µm thick) on Dark basalt (grains > 400 µm) at ~100 K

Sub-Experiment Water frost on grains < 100 µm

Spectrum Vis-NIR reflectance spectrum of Dark basalt (grains < 100 µm) at 293 K Spectrum Vis-NIR reflectance spectrum of Water frost (~13 µm thick) on Dark basalt (grains < 100 µm) at ~100 K Spectrum Vis-NIR reflectance spectrum of Water frost (~52 µm thick) on Dark basalt (grains < 100 µm) at ~100 K Spectrum Vis-NIR reflectance spectrum of Water frost (~75 µm thick) on Dark basalt (grains < 100 µm) at ~100 K

Sub-Experiment Intimate mixture of Water ice and JSC Mars-1

Sub-Experiment Intimate mixture with water ice particles 4.5±2.5 μm

Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 (original powder) at 293 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 mixed with 10 wt% Water ice particles (4.5±2.5 μm) at ~90 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 mixed with 35 wt% Water ice particles (4.5±2.5 μm) at ~90 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 mixed with 50 wt% Water ice particles (4.5±2.5 μm) at ~90 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 mixed with 75 wt% Water ice particles (4.5±2.5 μm) at ~90 K Spectrum Vis-NIR reflectance spectrum of Water ice particles (4.5±2.5 μm) at ~120 K

Sub-Experiment Intimate mixture with water ice particles 67±31 μm

Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 (original powder) at 293 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 mixed with 10 wt% Water ice particles (67±31 μm) at ~100 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 mixed with 35 wt% Water ice particles (67±31 μm) at ~100 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 mixed with 50 wt% Water ice particles (67±31 μm) at ~100 K Spectrum Vis-NIR reflectance spectrum of JSC Mars-1 mixed with 75 wt% Water ice particles (67±31 μm) at ~100 K Spectrum Vis-NIR reflectance spectrum of Water ice particles (67±31 μm) at ~120 K

Sub-Experiment Intimate mixture of Water ice and Dark basalt

Sub-Experiment Intimate mixture with water ice particles 67±31 μm

Spectrum Vis-NIR reflectance spectrum of Dark basalt (original powder) at 293 K Spectrum Vis-NIR reflectance spectrum of Dark basalt mixed with 35 wt% Water ice particles (67±31 μm) at ~120 K Spectrum Vis-NIR reflectance spectrum of Dark basalt mixed with 50 wt% Water ice particles (67±31 μm) at ~120 K Spectrum Vis-NIR reflectance spectrum of Dark basalt mixed with 75 wt% Water ice particles (67±31 μm) at ~120 K Spectrum Vis-NIR reflectance spectrum of Water ice particles (67±31 μm) at ~120 K

Sub-Experiment Intimate mixture with water ice particles 67±31 μm and Frost

Spectrum Vis-NIR reflectance spectrum of Water frost (~80 µm) over Dark basalt mixed with 35 wt% Water ice particles (67±31 μm) at ~120 K Spectrum Vis-NIR reflectance spectrum of Water frost (~80 µm) over Dark basalt mixed with 50 wt% Water ice particles (67±31 μm) at ~120 K Spectrum Vis-NIR reflectance spectrum of Water frost (~80 µm) over Dark basalt mixed with 75 wt% Water ice particles (67±31 μm) at ~120 K

Sub-Experiment Water saturated frozen soils

Sub-Experiment JSC Mars-1 (grains < 100 µm)

Spectrum Vis-NIR reflectance spectrum of Frozen water saturated (87 wt%) JSC Mars-1 (grains < 100 µm) after 3h of sublimation Spectrum Vis-NIR reflectance spectrum of Frozen water saturated (87 wt%) JSC Mars-1 (grains < 100 µm) after 7h of sublimation Spectrum Vis-NIR reflectance spectrum of Frozen water saturated (87 wt%) JSC Mars-1 (grains < 100 µm) after 14h of sublimation Spectrum Vis-NIR reflectance spectrum of Frozen water saturated (87 wt%) JSC Mars-1 (grains < 100 µm) after 17h of sublimation

Sub-Experiment Dark basalt (grains < 100 µm)

Spectrum Vis-NIR reflectance spectrum of Frozen water saturated (90 wt%) Dark Basalt (grains < 100 µm) after 3h of sublimation Spectrum Vis-NIR reflectance spectrum of Frozen water saturated (90 wt%) Dark Basalt (grains < 100 µm) after 3.5h of sublimation Spectrum Vis-NIR reflectance spectrum of Frozen water saturated (90 wt%) Dark Basalt (grains < 100 µm) after 4h of sublimation Spectrum Vis-NIR reflectance spectrum of Frozen water saturated (90 wt%) Dark Basalt (grains < 100 µm) after 4.5h of sublimation Spectrum Vis-NIR reflectance spectrum of Frozen water saturated (90 wt%) Dark Basalt (grains < 100 µm) after 4.6h of sublimation

Material

Name: Ti-Magnetite

Origin: natural terrestrial
Comments: mass fraction assuming all TiO2 is in Ti-Magnetite

Grain sizes

Grains	Size min	Size max	Size median	Size width	Size mass fraction	Grain shape
#1		100.0 ${\mu}m$				None

Size method

The grains of JSC Mars-1 were dry-sieved with a 100-µm sieve.

Constituents in material

Number: 2
Arrangement: endmembers polyphase

	Name	Compound type	Arrangement	Mass ($g$)	Mass fraction	Adsorbat name
	Magnetite	oxide-hydroxide	endmember in polyphase		0.48 $\pm$ 0.1
	Ulvospinel	oxide-hydroxide	endmember in polyphase		0.52 $\pm$ 0.1