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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Bassanite GDS145 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: GDS145
MINERAL_TYPE: Sulfate
MINERAL: Bassanite
FORMULA: 2CaSO4*H2O
FORMULA_HTML: 2CaSO4•H2O
COLLECTION_LOCALITY: Heated Gypsum to Form
ORIGINAL_DONOR: Jim Crowley
CURRENT_SAMPLE_LOCATION: USGS Reston, Virginia
ULTIMATE_SAMPLE_LOCATION: USGS Reston, Virginia
SAMPLE_DESCRIPTION:
dehydration of gypsum at 60°C hydrous sulfate
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.
IMAGE_OF_SAMPLE:
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Not Available
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
dehydration of gypsum at 60°C
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2a3a4_ # 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 656 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 1307 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib06a r 3422 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 3433 | g.s.= |