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DOCUMENTATION_FORMAT: Man_Made
SAMPLE_ID: GDS370
MATERIAL_TYPE: Plastic
MATERIAL: Plastic
FORMULA: CH4 compound
FORMULA_HTML: CH4 compound
COLLECTION_LOCALITY: Littleton, Colorado
ORIGINAL_DONOR: Gregg Swayze
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab
SAMPLE_DESCRIPTION:
This sample was collected from a construction site. The sample had been exposed to the weather for several days. The sample is 0.15 mm thick.
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
The spectrum was measured on the weathered surface of the plastic. The visqueen plastic spectrum resembles spectra of High Density Polyethene (HDPE) plastic. The spectrum is essentially flat from 0.55 to 1.1 microns at a reflectance level of 45%. Significant absorptions occur at 1.2141, 1.4181. There are C-H stretch absorptions at 1.7298, 1.7650, and 1.8206 microns. There are weaker absorptions at 2.0100 and 2.0525 microns. There are also C-H combination bands at 2.3102, 2.3501 microns and and a broad complex of bands centered around 2.415 microns.
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns