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DOCUMENTATION_FORMAT: Man_Made
SAMPLE_ID: GDS357
MATERIAL_TYPE: Wood
MATERIAL: Cedar Shake
FORMULA: Unknown
FORMULA_HTML: Unknown
COLLECTION_LOCALITY: Denver, Colorado
ORIGINAL_DONOR: Gregg Swayze
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab
SAMPLE_DESCRIPTION:
The sample was cut from a fresh cedar roofing shake about 24 cm in length and 14 cm wide. The spectrum was collected of its unweathered surface. This sample was never exposed to the elements in an outdoor environment.
IMAGE_OF_SAMPLE:
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:
A strong absorption edge located at 0.79 microns gives the shake its light brown color. From about 1.1 micron into the near infrared, there are a number of absorptions due to water, lignin, and cellulose typical of wood. G. Swayze.
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns