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(For further information on spectroscopy, see:
http://speclab.cr.usgs.gov)
TITLE: Europium_Oxide GDS33 DESCRIPT
DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: GDS33
MINERAL_TYPE: Oxide
MINERAL: Europium_Oxide
FORMULA: Eu2O3
FORMULA_HTML: Eu2O3
COLLECTION_LOCALITY: Synthetic
ORIGINAL_DONOR: Spex Standard Reagent Grade, Lot #03811
CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory
SAMPLE_DESCRIPTION:
Reagent grade Eu-oxide, 83.6 % Eu, Lot #03811
IMAGE_OF_SAMPLE:
NO PHOTO
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
40 kV - 30 mA, 6.5-9.5 keV
File: euoxid33.mdi (smear mount on quartz plate)
References: JCPDS #18-507, 34-72, 34-392A
Found: Eu2O3 cubic
Sought but not found: EuO and Eu2O3 monoclinic
Comment: Peaks are broad, ragged, and there is no resolution of the
alpha1-alpha2 reflections, indicating poor crystallinity.
Reflections with intensities <10% of the chart width (about 20
counts) are very poorly resolved. Most peak positions and relative
intensities match those of JC-PDS #34-392A, but two very weak
reflections at 2.79 and 2.81 Angstroms could not be indexed. There
are two unindexed maxima in the strip chart (at 2.93 and 3.85
Angstroms) that are so weak that they may not be significant
peaks.
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
83.6% Eu, Spex Standard, Reagent grade
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
No observed impurities. G. Swayze.
average grain size = 4 µm
END_MICROSCOPIC_EXAMINATION.
SPECTROSCOPIC_DISCUSSION:
END_SPECTROSCOPIC_DISCUSSION.
SPECTRAL_PURITY: 1a2_3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
| LIB_SPECTRA_HED: | where | Wave Range | Av_Rs_Pwr | Comment |
|---|---|---|---|---|
| LIB_SPECTRA: | splib04a r 1625 | 0.2-3.0µm | 200 | g.s.= 4 µm |
| LIB_SPECTRA: | splib05a r 2664 | 0.2-3.0µm | 200 | g.s.= 4 µm |
| LIB_SPECTRA: | splib06a r 7755 | g.s.= |