DOCUMENTATION_FORMAT: Man_Made
SAMPLE_ID: JMC313 Lab No. S6086 "Specpure" reagent
MATERIAL_TYPE: Chemical Reagent
MATERIAL: Rare Earth Oxide
FORMULA: Gd2O3
FORMULA_HTML: Gd2O3
COLLECTION_LOCALITY: Johnson, Matthey, and Co., Limited, London
ORIGINAL_DONOR: Steve Wilson USGS
CURRENT_SAMPLE_LOCATION: USGS Denver Bld. 20 Room G1509
ULTIMATE_SAMPLE_LOCATION: USGS Denver Bld. 20 Room G1509
SAMPLE_DESCRIPTION:
Gadolinium oxide "Specpure" chemical reagent.
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 has a weak absorption at 0.97 microns and a much stronger absorption at 1.42 microns. There are also weak absorptions at 2.31 and 2.45 microns. These absorptions may be OH related. The spectrum apparently lacks detectable f-f transition absorptions present in spectra of other Lanthanide series elements over the 0.35 to 2.5 micron wavelength range at the spectral resolution of the ASD spectrometer -- assuming that the absorptions in the 2 micron region are not from f-f transitions. G. Swayze.
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1c2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns