Sample Description USGS Spectral Library Version 7

USGS Spectral Library Version 7 Sample Description

Kokaly, R.F., Clark, R.N., Swayze, G.A., Livo, K.E., Hoefen, T.M., Pearson, N.C., Wise, R.A., Benzel, W.M., Lowers, H.A., Driscoll, R.L., and Klein, A.J., 2017, USGS Spectral Library Version 7: U.S. Geological Survey Data Series 1035, 61 p., https://doi.org/10.3133/ds1035
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web link}

TITLE: Europium_Oxide A-4 SPEX DESCRIPT

DOCUMENTATION_FORMAT: Man_Made

SAMPLE_ID: A-4

MATERIAL_TYPE: Chemical Reagent

MATERIAL: Rare Earth Oxide

FORMULA: Eu2O3

FORMULA_HTML: Eu₂O₃

COLLECTION_LOCALITY: SPEX Industries, Inc., New Jersey, USA

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:

Europium oxide chemical reagent 99.9% pure.

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 is dominated by numerous sharp f-f transition absorptions in the visible and possibly NIR region. A partial list includes absorptions at 0.3951, 0.4674, 0.5369, and 0.9687 microns. The absorption at 1.4202 microns may be due to an OH vibration. Absorptions at 2.0243, 2.1815, 2.3078 and 2.444 microns may be broader f-f transition absorptions or OH related. 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