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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Calcite CO2004 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: CO2004
MINERAL_TYPE: Carbonate
MINERAL: Calcite (Calcite group)
FORMULA: CaCO3
FORMULA_HTML: CaCO3
COLLECTION_LOCALITY: Alligator Ridge Mine, Nevada
ORIGINAL_DONOR: Phoebe Hauff
CURRENT_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder
ULTIMATE_SAMPLE_LOCATION: CSES/CIRES, Univ. of CO, Boulder
SAMPLE_DESCRIPTION:
Forms series with Rhodochrosite. Trimorphous with Aragonite and Vaterite.
IMAGE_OF_SAMPLE:
NO PHOTO
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Calcite + minor quartz
Kruse, F.A., and P.L. Hauff, eds., 1992, The IGCP-264 Spectral Properties Database. IUGS/UNESCO, Special Publication, 211 p., (in press).
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
Bimodal Grain size distribution:
mode 1: 575 µm @ 70 vol%
mode 2: 25 µm @ 30 vol%
avg. gr sz = 480 µm
Uniaxial (-), high birefringence, rhombic cleavage, clear color, vigorous fizz with HCl, all consistent with calcite. G. Swayze.
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1b2_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 809 | 0.2-3.0µm | 200 | g.s.= 480 µm |
| LIB_SPECTRA: | splib05a r 1474 | 0.2-3.0µm | 200 | g.s.= |
| LIB_SPECTRA: | splib06a r 4113 | g.s.= |