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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Zircon WS522 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: WS522
MINERAL_TYPE: Nesosilicate
MINERAL: Zircon
FORMULA: ZrSiO4
FORMULA_HTML: ZrSiO4
COLLECTION_LOCALITY: Gurpui, Goias, Brazil
ORIGINAL_DONOR: Ward Scientific
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
less than 250 µ grain size.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
40 kV - 30 mA, 6.5-9.5 keV
File: zircn522.out, -.mdi
Reference: Borg and Smith (1969).
Found: zircon, trace quartz?
Comment: Zircon very well crystallized. An very weak but distinct reflection that is not indexable as ziron lies in the position of the strong quartz (100). The strongest quartz reflection (101) lies at the position of the strong zircon (200) and thus could not be seen, if present.
J.S. Huebner, J. Pickrell, T. Schaefer, written communication 1994
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: 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 5191 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib05a r 7049 | 0.2-3.0µm | 200 | g.s.= |
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