Laboratory Spectroscopy in Herschel/PACS Range of Astrophysically Important Minerals Andy Nissinboim, Joseph Boesenberg, Julie Leibold, Kristen Sherman George E. Harlow , Denton Ebel Karl Hibbitts and Carey Lisse Tatiana Brusentsova, Doug Maukonen, Pedro Figueiredo, Himanshu Saxena, Robert E. Peale Presented at AAS meeting, Washington DC Jan 2010
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Laboratory Spectroscopy in Herschel/PACS Range of Astrophysically Important Minerals Andy Nissinboim, Joseph Boesenberg, Julie Leibold, Kristen Sherman.
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Laboratory Spectroscopy in Herschel/PACS Range of
Astrophysically Important Minerals
Andy Nissinboim, Joseph Boesenberg, Julie Leibold, Kristen Sherman
George E. Harlow , Denton Ebel
Karl Hibbitts and Carey Lisse
Tatiana Brusentsova, Doug Maukonen, Pedro Figueiredo, Himanshu Saxena, Robert E. Peale
Presented at AAS meeting, Washington DC Jan 2010
Astro-relevant minerals
high-T (>1000K) predictions from condensation calculations
minerals found in carbonaceous chondrite meteorites
minerals interpreted from Spitzer/Deep Impact spectrum, found in Stardust samples and in IDPs
minerals found in differentiated meteorites and planets
Select grains from AMNH mineral collection– Crush to separate intergrowths– Sweep magnetic impurities– Dissolve carbonate impurities in HCl (acid)– Hand pick clean grains
Verify crystallography (single crystal x-ray)Electron microprobe on single grains
– Chemical composition– Cation stoichiometry
Pellet preparation and spectroscopy
Make dust– micronizing mill– Stokes settling– grain size distribution
Weigh and mix in polyethylene powder
Melt press to pellets
Fourier transform spectrometer: 14-250 microns
20 microns
cerussite
1 2 3 4 5 60
50
100
Num
ber
of p
artic
les
Particle diameter (micron)
Cerussite
Disseminate results• Planetary Data System, Cross-referenced
• Curation of all samples at AMNH – Samples– Pellets– All data
Carbonates: Calcite & Dolomite group
0
20
40
60
80
100
dolomite
- 40
8- 37
0 322
-
263
-
173
-16
0 -Ca Mg (CO
3)2
0
20
40
60
80
100CaMg
3(CO
3)4
Wavenumber (cm-1)
Tra
nsm
ittan
ce (
%)
512
-
443
- - 40
0
382
-- 36
3
282
- 24
9 -
214
- 18
5 -
155
-11
7 - 79
-
huntite
600 500 400 300 200 1000
20
40
60
80
100Ca
0.78Mn
1.13(CO
3)2
260
-
320
- 204
-15
3 -
138
-
kutnohorite
0
20
40
60
80
100Ca(Fe
0.28Mg
0.65)(CO
3)2
154
-16
6 -
220
-25
9 -
- 32
0- 35
6
ankerite
0
20
40
60
80
100
228
-256
-30
6 -
- 38
0- 43
9
magnesiteMgCO
3
Tra
nsm
ittan
ce (
%)
0
20
40
60
80
10098
-11
0 -
228
-- 31
9- 36
0
calciteCaCO
3
0
20
40
60
80
100
160
-17
7 -20
5 -
- 30
835
2 -
rhodochrositeMnCO
3
600 500 400 300 200 1000
20
40
60
80
100
Wavenumber (cm-1)
195
-23
0 -
- 37
8sideriteFeCO
3
Spitzer SpitzerPACS PACS
-The lines in the PACS range within the same mineral group directly depend on the mineral species
Hydroxyl-containing, acid- and hydrated Carbonates: