FEEDBACK

The Cosmic Ice Laboratory - IR Spectra

The Cosmic Ice Laboratory - IR Spectra


Links to IR spectra in various formats are available in the following tables. PLEASE NOTE: If you find these spectra helpful in your research, please acknowledge any use by reference to "Hudson et al." and this NASA web site.

Here are the types of spectra in the three tables below:

  1. Mid-IR Spectra of Molecules Diluted in H2O at 15 - 20 K

  2. Far-IR Spectra of H2O Ice

  3. IR Spectra of NH3-Containing Ices (See Moore, M. H., Ferrante, R. F., Hudson, R. L., and Stone, J. N. (2007). Ammonia—Water Ice Laboratory Studies Relevant to Outer Solar System Surfaces. Icarus, 190, 260-273.)



Mid-IR (4000-400 cm-1) Spectra of Molecules Diluted in H2O at 15 - 20 K

Ice Composition Description Available Formats
Carbon Oxides
H2O + CO (20:1) Water + Carbon Monoxide (20:1) at T = 16 K ASCII [74 kb]
SPC [20 kb]
PDF [25 kb]
H2O + CO2 (10:1) Water + Carbon Dioxide (10:1) at T = 17 K ASCII [59 kb]
SPC [16 kb]
PDF [23 kb]
Alkanes
H2O + CH4 (20:1) Water + Methane (20:1) at T = 15 K ASCII [56 kb]
SPC [16 kb]
PDF [22 kb]
H2O + C2H6 (20:1) Water + Ethane (20:1) at T = 15 K ASCII [56 kb]
SPC [16 kb]
PDF [22 kb]
H2O + C3H8 (22:1) Water + Propane (22:1) at T = 16 K ASCII [58 kb]
SPC [16 kb]
PDF [20 kb]
H2O + C4H10 (20:1) Water + Butane (20:1) at T = 16 K ASCII [59 kb]
SPC [15 kb]
PDF [22 kb]
Alkenes
H2O + C2H4 (20:1) Water + Ethylene (20:1) at T = 15 K ASCII [57 kb]
SPC [15 kb]
PDF [22 kb]
H2O + C3H6 (17:1) Water + Propylene (17:1) at T = 17 K ASCII [58 kb]
SPC [16 kb]
PDF [22 kb]
Alkynes
H2O + C2H2 (15:1) Water + Acetylene (15:1) at T = 15 K ASCII [58 kb]
SPC [16 kb]
PDF [20 kb]
H2O + C3H4 (approx. 20:1) Water + Methylacetylene (approx. 20:1) at T = 16 K ASCII [59 kb]
SPC [16 kb]
PDF [21 kb]
Dienes
H2O + C3H4 (13:1) Water + Allene (13:1) at T = 17 K ASCII [60 kb]
SPC [16 kb]
PDF [22 kb]
H2O + C4H6 (20:1) Water + Butadiene (20:1) ASCII [56 kb]
SPC [16 kb]
PDF [22 kb]
Alcohols
H2O + CH3OH (5:1) Water + Methanol (5:1) ASCII [224 kb]
SPC [59 kb]
PDF [33 kb]
H2O + C2H5OH (20:1) Water + Ethanol (20:1) at T = 15 K ASCII [56 kb]
SPC [16 kb]
PDF [23 kb]
H2O + C2H4(OH)2 (5:1) Water + Ethylene Glycol (5:1) at T = 18 K. H2O features are identified with asterisks ("*") in the graphs. ASCII [55 kb]
EPS [53 kb]
Aldehydes
H2O + H2CO (8:1) Water + Formaldehyde (8:1) at T = 15 K ASCII [55 kb]
SPC [16 kb]
PDF [24 kb]
H2O + CH3COH (20:1) Water + Acetaldehyde (20:1) at T = 16 K ASCII [57 kb]
SPC [16 kb]
PDF [24 kb]
Ketones
H2O + (CH3)2CO (20:1) Water + Acetone (20:1) at T = 16 K ASCII [58 kb]
SPC [16 kb]
PDF [23 kb]
H2O + (CH3)(C2H5)CO (approx. 40:1) Water + Methylethyl Ketone (MEK) (approx. 40:1) ASCII [57 kb]
SPC [16 kb]
PDF [23 kb]
Acids
H2O + HCOOH (9:1) Water + Formic Acid (9:1) at T = 17 K ASCII [58 kb]
SPC [16 kb]
PDF [24 kb]
H2O + CH3COOH (10:1) Water + Acetic Acid (10:1) at T = 16 K ASCII [58 kb]
SPC [16 kb]
PDF [22 kb]
Esters
H2O + HCOOCH3 (20:1) Water + Methylformate (20:1) at T = 16 K ASCII [73 kb]
SPC [20 kb]
PDF [24 kb]
Ethers
H2O + (CH3)2O (20:1) Water + Dimethylether (20:1) ASCII [75 kb]
SPC [20 kb]
PDF [33 kb]
H2O + c-C2H4O (approx. 20:1) Water + Ethylene Oxide (approx. 20:1) ASCII [75 kb]
SPC [20 kb]
PDF [25 kb]
Amines
H2O + NH3 Water + Ammonia See table below
H2O + CH3NH2 Water + Methylamine (unknown dilution) at T = 16 K ASCII [56 kb]
SPC [16 kb]
PDF [24 kb]
Assorted
H2O + N2O (10:1) Water + Nitrous Oxide (dinitrogen oxide) (10:1) at T = 18 K ASCII [57 kb]
SPC [16 kb]
PDF [21 kb]
H2O + HCN (3:1) Water + Hydrogen Cyanide (3:1) ASCII [71 kb]
SPC [20 kb]
PDF [25 kb]
H2O + H2O2 (3%) Water + Hydrogen Peroxide (3%) at T = 19 K ASCII [55 kb]
SPC [16 kb]
PDF [21 kb]
H2O + OCS (20:1) Water + Carbonyl Sulfide (20:1) at T = 16 K ASCII [59 kb]
SPC [16 kb]
PDF [23 kb]



Far-Infrared Spectra of H2O Ice (read a detailed description here)

Ice History Description Available Formats
H2O deposited at 14 K
and subsequently warmed
deposit at 14 K ASCII [28 kb]
warmed to 40 K ASCII [25 kb]
warmed to 80 K ASCII [26 kb]
warmed to 100 K ASCII [25 kb]
warmed to 120 K ASCII [24 kb]
warmed to 140 K ASCII [24 kb]
warmed to 160 K ASCII [24 kb]
H2O deposited at 160 K
and subsequently cooled
deposit at 160 K ASCII [24 kb]
cooled to 140 K ASCII [24 kb]
cooled to 120 K ASCII [24 kb]
cooled to 100 K ASCII [24 kb]
cooled to 80 K ASCII [24 kb]
cooled to 40 K ASCII [26 kb]
cooled to 14 K ASCII [28 kb]
H2O deposited at various temperatures
deposit at 40 K ASCII [26 kb]
deposit at 80 K ASCII [24 kb]
deposit at 100 K ASCII [24 kb]
deposit at 120 K ASCII [24 kb]
deposit at 140 K ASCII [24 kb]



IR Spectra of NH3-Containing Ices

For details, see Moore, M. H., Ferrante, R. F., Hudson, R. L., and Stone, J. N. (2007). Ammonia�Water Ice Laboratory Studies Relevant to Outer Solar System Surfaces. Icarus, 190, 260-273.

Figure Description Available Formats
Figure 1
NH3 compared to H2O+NH3 Ices

A graph of the relative absorbance of NH3 comapred to H2O + NH3 at different temperatures. Shows increased activity arounf the 3400 cm-1 and 1000 cm-1.
NH3 9 K
Amorphous Phase
ASCII [162 kb]
SPC [40 kb]
NH3 ~90 K
Transition Phase
ASCII [154 kb]
SPC [40 kb]
NH3 95 K
Cubic Phase
ASCII [255 kb]
SPC [61 kb]
H2O + NH3 9 K ASCII [53 kb]
SPC [15 kb]
H2O + NH3 90 K ASCII [50 kb]
SPC [14 kb]
H2O + NH3
130 K
ASCII [50 kb]
SPC [14 kb]
Figure 2
IR spectra of Ices made from H2O/NH3=0.5 gas-phase mixtures

Graph of the relative absorbance of H2O/NH3 mixtures at different temperatures and monohydrate versus hemihydrate. Shows increased acitivy around 1100 cm-1.
Spectrum (a) ASCII [247 kb]
SPC [61 kb]
Spectrum (b) ASCII [247 kb]
SPC [61 kb]
Spectrum (c) ASCII [243 kb]
SPC [61 kb]
Spectrum (d) ASCII [246 kb]
SPC [61 kb]
Figure 3
This work compared to a hemihydrate reference spectrum

A graph showing the relative absorbtion of 'this work' compared to the hemihydrate reference spectrum (monohydrate is 2NH3 · H2O). Shows increased activity around the 3500 cm-1/3µm and 1000 cm-1 range.
This Work ASCII [225 kb]
SPC [61 kb]
Reference Spectrum ASCII [25 kb]
SPC [7 kb]
Figure 4
This work compared to a monohydrate reference spectrum

This Work ASCII [286 kb]
SPC [70 kb]
Reference Spectrum ASCII [30 kb]
SPC [9 kb]
Figure 5
The thermal evolution of hemihydrate 2NH3 � H2O

A graph showing the relative absorbtion of 'this work' compared to the hemihydrate reference spectrum (monohydrate is NH3 · H2O). Shows increased activity around the 3500 cm-1/3µm and 1000 cm-1 range
Spectrum (a) ASCII [247 kb]
SPC [61 kb]
Spectrum (b) ASCII [249 kb]
SPC [61 kb]
Spectrum (c) ASCII [246 kb]
SPC [61 kb]
Spectrum (d) ASCII [280 kb]
SPC [70 kb]
Figure 6
A comparative look at near-IR spectra from 5400 to 4000 cm-1

Graph showing the thermal evolution of hemihydrate 2NH3 · H2O, Shows a sharp spike in activity around the 1100 cm-1 range.
Amorphous NH3 ASCII [55 kb]
SPC [24 kb]
Transition NH3 ASCII [55 kb]
SPC [24 kb]
Cubic NH3 ASCII [255 kb]
SPC [61 kb]
2NH3 � H2O ASCII [225 kb]
SPC [61 kb]
NH3 � H2O ASCII [286 kb]
SPC [70 kb]
H2O+NH3 ASCII [50 kb]
SPC [14 kb]
Pure H2O ASCII [55 kb]
SPC [24 kb]
Figure 7
A comparative look at near-IR spectra from 5600 to 4000 cm-1

Graph comparing H2O, H2O + NH3, 2NH3 + H2O, and NH3. Shows spikes at the 5000 cm-1 and 4450 cm-1 range.
H2O/NH3=0 ASCII [162 kb]
SPC [40 kb]
H2O/NH3=0.7 ASCII [55 kb]
SPC [16 kb]
H2O/NH3=1.6 ASCII [53 kb]
SPC [15 kb]
H2O/NH3=4.7 ASCII [50 kb]
SPC [14 kb]
H2O/NH3=14 ASCII [53 kb]
SPC [15 kb]
H2O/NH3=42 ASCII [53 kb]
SPC [14 kb]
H2O/NH3=57 ASCII [52 kb]
SPC [15 kb]
Figure 9
Changes in the near- and mid-IR spectrum of 2NH3 � H2O at 50 K as a function of radiation dose

Graph showing changes in the near- and mid-IR spectrum of 2NH3 · H20 at 50 Kelvin. Shows spikes at 5000 cm-1,= and 1100 cm-1.
Spectrum (a) ASCII [230 kb]
SPC [61 kb]
Spectrum (b) ASCII [229 kb]
SPC [61 kb]
Spectrum (c) ASCII [230 kb]
SPC [61 kb]
Spectrum (d) ASCII [230 kb]
SPC [61 kb]
Spectrum (e) ASCII [224 kb]
SPC [61 kb]
Spectrum (f) ASCII [224 kb]
SPC [61 kb]
Reference Spectrum ASCII [230 kb]
SPC [61 kb]
Figure 10
Changes in the IR spectrum of 2NH3 � H2O before and after an irradiation of 2.8 eV molecule-1

Graph showing changes in the IR spectrum of 2NH3 · H2O before and after irradiation. Shows spikes at 1600 cm-1, 1100 cm-1 and 800 cm-1.
10 K Before ASCII [224 kb]
SPC [61 kb]
10 K After ASCII [224 kb]
SPC [61 kb]
50 K Before ASCII [230 kb]
SPC [61 kb]
50 K After ASCII [224 kb]
SPC [61 kb]
95 K Before ASCII [225 kb]
SPC [61 kb]
95 K After ASCII [224 kb]
SPC [61 kb]
Figure 13
IR spectra of an H2O + NH3 (7:1) ice at 10 K before and after irradiation to a dose of 7 eV molecule-1 at 10 K

Graph showing the IR spectra of H2O + NH3 (7:1) ice at 10 Kelvin before and after irradiation. Shows spikes at 1750 cm-1 and 1100 cm-1.
Reference Spectrum ASCII [55 kb]
SPC [24 kb]
Before Irradiation ASCII [55 kb]
SPC [15 kb]
After Irradiation ASCII [53 kb]
SPC [15 kb]


NASA Logo, National Aeronautics and Space Administration