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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Jarosite SJ-1 (H3O,10-20%) DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: SJ-1
MINERAL_TYPE: Sulfate
MINERAL: Jarosite (Alunite group)
FORMULA: (K,H3O)(Fe+3)3(SO4)2(OH)6
FORMULA_HTML: (K,H3O)Fe+33(SO4)2(OH)6
COLLECTION_LOCALITY: Synthetic, Charlie Alpers, USGS
ORIGINAL_DONOR: Charlie Alpers
CURRENT_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory.
ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver spectroscopy Laboratory.
SAMPLE_DESCRIPTION:
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
SJ-1 H3O-(10-20%) Jarosite, Box #1, 45 kV - 35 mA, 7.4-9.5 keV
SJ-1 H3O-(10-20%) Jarosite, Box #3, 40 kV - 30 mA, 7.3-9.5 keV
Reference: JCPDS #31-650 (hydronium jarosite)
Found: member of alunite group, spacing's match hydronium jarosite
Comment: Good correspondence with the JCPDS data for synthetic
hydronium jarosite and the brownish color suggest this alunite
[jarosite?] is iron- and hydronium-rich. The two samples
appear to duplicate each other. Both patterns show a very
very weak peak at 2.38 angstroms. Sharp peaks indicate good
crystallinity."
J.S. Huebner, J. Pickrell, and J. Randow, 1993, written communication.
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
Sample contains 10-20% hydronium ion.
Charlie Alpers, personal communication.
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
| LIB_SPECTRA_HED: | where | Wave Range | Av_Rs_Pwr | Comment |
|---|---|---|---|---|
| LIB_SPECTRA: | splib04a r 2508 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 3822 | 0.2-3.0µm | 200 | g.s.= |
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