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:
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TITLE: Karpatite GDS978 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: GDS978, GDS978 86K, GDS978 295K

MINERAL_TYPE: Organic Compound/Hydrocarbon

MINERAL: Karpatite

FORMULA: C24H12

FORMULA_HTML: C₂₄H₁₂

COLLECTION_LOCALITY: Sample is from the New Idria Mining District, San Bernadino County, California

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

ORIGINAL_DONOR: Purchased from Ibrahim Jameel mineral dealer

CURRENT_SAMPLE_LOCATION: USGS Spectroscopy Lab

ULTIMATE_SAMPLE_LOCATION: USGS Spectroscopy Lab

SAMPLE_DESCRIPTION:

Sample had acicular crystal formed in a carbonate matrix and was light green in color. The crystal were separated from the matrix though residual carbonate may remain attached

IMAGE_OF_SAMPLE: Not Available

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

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END_XRD_ANALYSIS.

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

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

No additional compositional details available.

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:Spectrum matches well with Sigma Aldrich Reagent Coronene which has the same molecular structure. There are impurities from the host rock

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2b3u4u # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns