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
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TITLE: Calcite.80wt+Kaol_CM9 GDS213 DESCRIPT

DOCUMENTATION_FORMAT: MIXTURE

SAMPLE_ID: GDS213

MIXTURE_TYPE: Intimate

MIXTURE: 80 wt% Calcite WS272 + 20 wt% well-crystallized kaolinite CM9

FORMULA: CaCo3, Al2Si2O5(OH)4

FORMULA_HTML: CaCo₃
Al₂Si₂O₅(OH)₄

COLLECTION_LOCALITY: See Calcite WS272 and Kaolinite CM9

ORIGINAL_DONOR: Wards Science (calcite) and Clay Mineral Society (kaolinite)

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:

Sample is a physical mixture of ground calcite and kaolinite prepared in the laboratory.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

see: Calcite WS272 and Kaolinite CM9

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: NONE # XRF, EPMA, ICP(Trace),WChem

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

see: Calcite WS272 and Kaolinite CM9

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

see: Calcite WS272 and Kaolinite CM9

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectrum has spectral absorptions from kaolinite and calcite. The main absorptions of both minerals in the 2.3 micron region partially overlap.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns