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Clark et. al. 2003 USGS Open File Report 03-395
Spectral Library splib05a Sample Description

(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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