DOCUMENTATION_FORMAT: Man_Made
SAMPLE_ID: GDS801
MATERIAL_TYPE: Paint Pigment
MATERIAL: Paint Pigment
FORMULA: Cu2(CO3)(OH)2
FORMULA_HTML: Cu2(CO3)(OH)2
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 greenish-blue.
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 broad reflectance peak centered at 0.52 microns with a broad neighboring absorption centered at 0.765 and broad shoulder centered at 1.316 microns. The 2 micron region is dominated by several sharp vibrational absorptions at 2.267 (with weak shoulder at 2.214 micorns), 2.353, and 2.404 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