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
Constituent
- Name
- Ferrihydrite
- IMA name
- Ferrihydrite
- Class
- non-silicate mineral
- Compound type
- oxide-hydroxide
- Comments
- nanophase (< 20 nm) ferric oxide particles
- Relevance
- main - major
- Arrangement
- single phase
- Mass fraction
- 1.0 $\pm$ 0.001
- Formula
- $Fe^{3+}_2O_3 \bullet 0.5(H_2O)$
- Chemical formula
- (Fe3+)2O3•0.5(H2O)
- Elemental formula
- (Fe3+)2 O3.5 H
- Isotope mixture type
- terrestrial abundance
- Oxides
-
Formula $Fe_{2}O_{3}$ $H_{2}O$ Mass fraction (%) 94.66 5.34
Strunz
- Class
- oxides - hydroxides - arsenites (04)
- Division
- hydroxides (without V or U) (04.F)
- Family
- Hydroxides with OH, without H2O; sheets of edge-sharing octahedral (04.FE)
- Code
- 04.FE.35
Dana
- Major class
- oxides and hydroxides (III)
- Class
- simple oxides (04)
- Type
- with a cation charge of 3+ (A+++2O3) (04.03)
- Group
- -Ferrihydrite- group (04.03.02)
- Code
- 04.03.02.02
- Phase type
- crystalline
- Crystal system
- trigonal
- Crystal class
- ditrigonal-scalenohedral
- Crystal class symbol
- -3m (D3d)
- Crystal spacegroup
- P-31c
- Texture
- nanocrystalline
- Molar mass
- 168.70 $g/mol$
- Density
- 3.8 - 3.93 $g/cm^3$
- Refringence type
- unknown
- Refringence sign
- unknown
- Color
- yellow brown, dark brown
- Diaphaneity
- opaque
- Luster
- unknown