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Experiment
Sample
E
xperiment
Visible near infrared spectra of rocks from the Solfatara crater, Phlegrean fields, Italy
S
ub-
E
xperiment
Crater bedrock
S
pectrum
Visible and near infrared reflectance spectrum of amorphous silica from crater wall(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate-rich coatings (alunite) from an altered crater wall(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate-rich coatings (jarosite) from an altered crater wall(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate (jarosite, alunite) and hematite-bearing coatings from an altered crater wall(Solfatara Crater, Italy)
S
ub-
E
xperiment
Mud pots
S
pectrum
Visible and near infrared reflectance spectrum of amorphous silica from mud pots(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of amorphous silica from mud pots(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of amorphous silica from a dry mud pot(Solfatara Crater, Italy)
S
ub-
E
xperiment
Fumarolic vents at 90°C
S
pectrum
Visible and near infrared reflectance spectrum of sulfur needles from within a fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate deposits (alunogen, alum-K) from within a fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate deposits (alunogen, alum-K, Goldichite) from within a fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate deposits (alunite,alunogen, alum-K) from within a fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate deposits (alunogen, alum-K) from within a fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate deposits (alunogen, alum-K, alunite) from within a fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate deposits (alunogen) from within a fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate deposits (alunogen, Goldichite) from within a fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of sulfate deposits (alum-K, alunogen, alunite) from within a fumarolic vent(Solfatara Crater, Italy)
S
ub-
E
xperiment
Fumarolic vents at 160°C
S
pectrum
Visible and near infrared reflectance spectrum of As and Hb -bearing sublimates from a 160°C fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of As and Hb -bearing sublimates from a 160°C fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of As and Hb -bearing sublimates from a 160°C fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of As and Hb -bearing sublimates from a 160°C fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of As and Hb -bearing sublimates from a 160°C fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of As and Hb -bearing sublimates from a 160°C fumarolic vent(Solfatara Crater, Italy)
S
pectrum
Visible and near infrared reflectance spectrum of white rock from a 160°C fumarolic vent(Solfatara Crater, Italy)
S
ample
Orange/dark brown deposits from within a second vent(L6R21)
L
ayer
Layer #1
Ma
tter
Sulfate deposits from within a pyroclastic vent (L6R21)
M
aterial
sulfate deposits
C
onstituent
Alunogen
C
onstituent
Alum-(K)
C
onstituent
Alunite
C
onstituent
Sulfur
Material
Name
sulfate deposits
Origin
Family
solid
Origin
natural terrestrial
Constituents in material
Number
4
Arrangement
multi-phases
Name
Compound type
Arrangement
Mass ($g$)
Mass fraction
Adsorbat name
Alunogen
sulfate
in multi-phases
0.32 $\pm$ 0.1
Alum-(K)
sulfate
in multi-phases
0.44 $\pm$ 0.1
Alunite
sulfate
in multi-phases
0.15 $\pm$ 0.1
Sulfur
elemental mineral
in multi-phases
0.09 $\pm$ 0.1