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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: Calcite.80+Mont_Swy-1 GDS212 DESCRIPT

DOCUMENTATION_FORMAT: MIXTURE

SAMPLE_ID: GDS212 MIXTURE_TYPE: Intimate

MIXTURE: 80wt% Calcite WS272 + 20wt% Montmorillonite SWy-1

FORMULA: CaCO3 + (Na,Ca0.5)0.33(Al,Mg)2[(SiAl)4O10(OH)2]*nH2O

FORMULA_HTML: CaCO3 + Na,Ca0.5)0.33(Al,Mg)2[(SiAl)4O10(OH)2•nH2O

COLLECTION_LOCALITY: See Calcite WS272 and Montmorillonite SWy-1

ORIGINAL_DONOR: Ward Science Collection and Source Clay Society

COLLECTION_LATITUDE: Not Available # degrees and decimal minutes (N or S)

COLLECTION_LONGITUDE: Not Available # degrees and decimal minutes (W or E)

DATUM: Not Available # coordinate datum

CURRENT_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Physical mixture of calcite and montmorillonite pure phases in proportions 80wt% Calcite WS272 + 20wt% Montmorillonite SWy-1.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

see: See Calcite WS272 and Montmorillonite SWy-1

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: NONE # XRF, EM(WDS), ICP(Trace),WChem

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

See: See Calcite WS272 and Montmorillonite SWy-1

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

None

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectrum has absorptions characteristic of calcite and montmorillonite absorptions. There is very little overlap between absorptions in this mixture.

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: splib05a r 7739 0.2-3.0µm 200 g.s.=


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