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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Gypsum SU2202 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: SU2202
MINERAL_TYPE: Sulfosalt
MINERAL: Gypsum
FORMULA: CaSO4*2H2O
FORMULA_HTML: CaSO4•2H2O
COLLECTION_LOCALITY: unknown
ORIGINAL_DONOR: Ward Natural Science Collection
CURRENT_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder
ULTIMATE_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder
SAMPLE_DESCRIPTION:
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Pure (?).
Kruse, F.A., and P.L. Hauff, eds., 1992, The IGCP-264 Spectral Properties Database. IUGS/UNESCO, Special Publication, 211 p., (in press).
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
Bimodal gr sz distribution:
mode 1 225 µm @ 35 vol%
mode 2 13 µm @ 65 vol%
average grain size= 133 µm
Smaller grains coat 90% of larger grain surfaces. Very soft, well developed cleavage, biaxial, no contaminants. G. Swayze.
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 1889 | 0.2-3.0µm | 200 | g.s.= 133 µm |
| LIB_SPECTRA: | splib05a r 3003 | 0.2-3.0µm | 200 | g.s.= |
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