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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Tourmaline HS282 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: HS282
MINERAL_TYPE: Cyclosilicate
MINERAL: Tourmaline (Tourmaline group)
FORMULA: (Na,Ca)(Li,Mg,Al)(Al,Fe,Mn)6(BO3)3(Si6O18)(OH)4
FORMULA_HTML: (Na,Ca)(Li,Mg,Al)(Al,Fe,Mn)6(BO3)3(Si6O18)(OH)4
COLLECTION_LOCALITY: Australia
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 brown. The spectrum shows intense features near 0.75 µ and 1.1 µ, due to transitions in ferric and ferrous iron, respectively, and features in the 1.4 and 2.2 to 2.4 µ region.
Sieve interval 74 - 250µm.
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.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Tourmaline + medium amount of mica + medium amount of other; M: ~10% feldspar, ~10% muscovite, no HCl fizz
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: 1c2_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 5022 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 6873 | 0.2-3.0µm | 200 | g.s.= |
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