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(For further information on spectrsocopy, see:
http://speclab.cr.usgs.gov)
TITLE: Clinochlore_Fe SC-CCa-1 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: SC-CCa-1
MINERAL_TYPE: Phyllosilicate
MINERAL: Ferroan Clinochlore (Ripidolite) (Chlorite Group)
FORMULA: (Fe+2,Mg)5Al(Si3Al)O10(OH)8
FORMULA_HTML: (Fe+2,Mg)5Al(Si3Al)O10(OH)8
COLLECTION_LOCALITY: Flagstaff Hill, El Dorado Co., CA
ORIGINAL_DONOR: Clay Mineral Society, Clay Mineral Repository
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Sample was ground in an alumina mortar and pestle and wet sieved with methanol into less than 30µm (c), 45-104µm (b), and 104-150µm (a) size fractions.
King, T.V.V. and R.N. Clark, 1989, Spectral Characteristics of Chlorites and Mg-Serpentines Using high-Resolution Reflectance Spectroscopy. Jour. Geophys. Res., 13.997-14,008.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
This sample is representative of it structural classification. (King and Clark, 1989).
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: EM(WDS) # XRF, EM(WDS), ICP(Trace), WChem
| COMPOSITION KEYWORD |
Oxide ASCII |
Amount | Weight Percent, % |
Oxide html |
|---|---|---|---|---|
| COMPOSITION: | SiO2 | 33.20 | wt% | SiO2 |
| COMPOSITION: | TiO2 | 0.85 | wt% | TiO2 |
| COMPOSITION: | Al2O3 | 25.80 | wt% | Al2O3 |
| COMPOSITION: | Fe2O3 | 20.70 | wt% | Fe2O3 |
| COMPOSITION: | MnO | 0.09 | wt% | MnO |
| COMPOSITION: | MgO | 26.10 | wt% | MgO |
| COMPOSITION: | CaO | less than 0.02 | wt% | CaO |
| COMPOSITION: | Na2O | 0.22 | wt% | Na2O |
| COMPOSITION: | K2O | less than 0.02 | wt% | K2O |
| COMPOSITION: | P2O5 | 0.05 | wt% | P2O5 |
| COMPOSITION: | LOI | 9.23 | wt% | LOI |
| COMPOSITION: | Total | 100.78 | wt% | |
| COMPOSITION: | O=Cl,F,S | wt% | #correction for Cl, F, S | |
| COMPOSITION: | New Total | wt% |
COMPOSITION_TRACE:
COMPOSITION_DISCUSSION:
Compositional data provided by Gene Whitney, USGS, Denver, CO King, T.V.V. and R.N. Clark, 1989, Spectral Characteristics of Chlorites and Mg-Serpentines Using high-Resolution Reflectance Spectroscopy. Jour. Geophys. Res., 13.997-14,008.
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
Microscopically this appears to be pure ripidolite. All size fractions were examined visually and by energy dispersive methods to ensure chemical homogeneity as a function of grain size interval.
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 1110 | 0.2-2.7µm | 200 | g.s.= 115µm |
| LIB_SPECTRA: | splib04a r 1121 | 0.2-2.7µm | 200 | g.s.= 53µm |
| LIB_SPECTRA: | splib04a r 1132 | 0.2-2.7µm | 200 | g.s.= 15µm |
| LIB_SPECTRA: | splib05a r 2030 | 0.2-2.7µm | 200 | g.s.= 115µm |
| LIB_SPECTRA: | splib05a r 2043 | 0.2-2.7µm | 200 | g.s.= 53µm |
| LIB_SPECTRA: | splib05a r 2056 | 0.2-2.7µm | 200 | g.s.= 15µm |
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