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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Syngenite GDS139 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: GDS139
MINERAL_TYPE: Hydrous Sulfate
MINERAL: Syngenite
FORMULA: K2Ca(SO4)2*H2O
FORMULA_HTML: K2Ca(SO4)2•H2O
COLLECTION_LOCALITY: X-rayed (Synthetic)
ORIGINAL_DONOR: Jim Crowley
CURRENT_SAMPLE_LOCATION: USGS Reston, Virginia
ULTIMATE_SAMPLE_LOCATION: USGS Reston, Virginia
SAMPLE_DESCRIPTION:
evaporation of K2SO4 + CaSO4 solution at room temperature
Spectrum originally published in: Crowley, J.K., 1991, Visible and Near-Infrared (0.4 - 2.5µm) Reflectance Spectra of Playa Evaporite Minerals: Journal of Geophysical Research, vol 96, no.B10, p. 16,231-16,240.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Pure syngenite. (Crowley, 1991)
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
evaporation of K2SO4 + CaSO4 solution at room temperature
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 4665 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 6460 | 0.2-3.0µm | 200 | g.s.= |
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