DOCUMENTATION_FORMAT: Man_Made
SAMPLE_ID: GDS802
MATERIAL_TYPE: Paint Pigment
MATERIAL: Paint Pigment
FORMULA: Fe4[Fe(CN)6]3 which may be hydrated
FORMULA_HTML: Fe4[Fe(CN)6]3 which may be hydrated
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 very dark purplish-blue.
Image is very dark and was collected under lighting conditions identical to that used to photograph the other paint pigments in this chapter.
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 relatively weak reflectance peak centered at 0.44 microns with a broad neighboring composite absorption with individual overlapping absorptions centered at approximately 0.56 and 0.96 microns. The NIR region is dominated by vibrational absorptions at 1.912, 2.034, 2.096, 2.146, 2.333, 2.368, 2.403, and 2.480 microns (continuum removed positions). 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