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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Thenardite HS450 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: HS450
MINERAL_TYPE: Sulfate
MINERAL: Thenardite
FORMULA: Na2SO4
FORMULA_HTML: Na2SO4
COLLECTION_LOCALITY: Camp Verde, California
ORIGINAL_DONOR: Hunt and Salisbury Collection
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
"This sample is transparent in hand specimen and appears unusually pure."
Hunt, G.R., Salisbury, J.W., and Lenhoff, C.J., 1971, Visible and Near-Infrared spectra of minerals and rocks: IV. Sulphides and Sulphates: Modern Geology, V. 3, p 1-14.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
40 kV - 30 mA, 6.5-9.5 keV
Reference : JCPDS #5-631
Found: Thenardite
Comment: One phase observed in routine work. Sharp peaks indicate
good crystallinity and compositional homogeneity. A great match
with the JCPDS pattern. However, if you are having problems that
require a better pattern (and more subtle interpretation), let us
know.
J.S. Huebner ,J. Pickrell, T. Schaefer, unpublished data, written communication, USGS, Reston, VA (1994)
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
None
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 4749 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 6533 | 0.2-3.0µm | 200 | g.s.= |
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