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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Ammonio-jarosite SCR-NHJ DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: SCR-NHJ
MINERAL_TYPE: Sulfate
MINERAL: Ammoniojarosite (Alunite group)
FORMULA: (NH4)(Fe+3)3(SO4)2(OH)6
FORMULA_HTML: (NH4)Fe+33(SO4)2(OH)6
COLLECTION_LOCALITY: Unavailable
ORIGINAL_DONOR: Charlie Alpers, USGS
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
IMAGE_OF_SAMPLE:
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
40 kV - 30 mA, 7.3-9.5 keV
File: amjarscf.out, -.mdi
References: JCPDS 26-1014; Huebner's reference patterns
Found : ammoniojarosite
Comment: strong pattern, sharp peaks, very well crystallized, excellent match to
the JCPDS pattern. A very weak, probably significant reflection at 2.356A
does not appear on the JCPDS card.
J.S. Huebner, J. Pickrell, T. Schaefer, written communication 1994
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
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 291 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 852 | 1.3-5.3µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 890 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib06a r 1812 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 1851 | g.s.= |