Sample Description USGS Spectral Library Version 7

USGS Spectral Library Version 7 Sample Description

Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A., Driscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S. Geological Survey Data Series 1035, 61 p., https://doi.org/10.3133/ds1035
_{For more information on the library, see:
local link
web link}

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,Ca_0.5)_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, EPMA, 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