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DOCUMENTATION_FORMAT: Man_Made
SAMPLE_ID: GDS787
MATERIAL_TYPE: Paint Pigment
MATERIAL: Paint Pigment
FORMULA: Pb(SbZn)O3
FORMULA_HTML: Pb(SbZn)O3
COLLECTION_LOCALITY: Phillips Collection, Washington, D.C
ORIGINAL_DONOR: Patricia Favero
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Lab
SAMPLE_DESCRIPTION:
Dry powdered paint pigment from Kremer Pigments Inc.
Visual examination in sunlight indicates this sample is light yellow.
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:
This pigment has a strong electronic absorption edge centered at about 0.52 microns where reflectance drops from 50% to nearly 2% in the visible. There is a broad vibrational absorption centered at 0.744 microns with shoulders at 0.652 and 0.839 microns. Another even broader band is centered at 1.292 microns with shoulders at 1.081 and 1.576 microns. There is also a broad relatively strong band at 1.938 microns with a relatively weaker absorption complex centered at 2.244 microns (continuum removed positions). Positions of absorptions and number of absorptions in absorption complexes with overlapping bands are approximate, and would require deconvolution to determine the actual number and position of absorptions. 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