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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Topaz HS184 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: HS184
MINERAL_TYPE: Nesosilicate
MINERAL: Topaz
FORMULA: Al2SiO4(F,OH)2
FORMULA_HTML: Al2SiO4(F,OH)2
COLLECTION_LOCALITY: Stoneham, Maine
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 colorless and displays a featureless spectrum in the visible, but has an unusual hydroxyl feature in the near-infrared.
Hunt, G.R., J.W. Salisbury, and C.J. Lenhoff, 1973, Visible and near-infrared spectra of minerals and rocks: VI. Additional silicates. Modern Geology, v. 4, p. 85-106.
IMAGE_OF_SAMPLE:
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Sample contains approximately 50% albite. No HCl fizz.
Clark, R.N., T.V.V. King, M. Klejwa, G. Swayze, and N. Vergo, 1990, High spectral resolution reflectance spectroscopy of minerals: J. Geophys Res. 12653-12680.
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1c2c3c4_ # 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 5010 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 6698 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib06a r 22304 | g.s.= | ||
| LIB_SPECTRA: | splib06a r 22317 | g.s.= |