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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TITLE: Xenotime GDS966 Iveland REE DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: GDS966

MINERAL_TYPE: Phosphate

MINERAL: Xenotime

FORMULA: Y(PO4)

FORMULA_HTML: Y(PO₄)

COLLECTION_LOCALITY: Setesdal, Iveland Municipality, Norway

ORIGINAL_DONOR: Rhonda Driscoll (USGS)

CURRENT_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory.

ULTIMATE_SAMPLE_LOCATION: U.S.G.S. Denver Spectroscopy Laboratory.

SAMPLE_DESCRIPTION: Individual dark crystal in a light pink matrix.

IMAGE_OF_SAMPLE:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Sample consist of xenotime. Diffraction peak positions and intensities indicate a pure phase. (R. Driscoll)

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION: Sample has a number of sharp spectral absorptions (f-f orbital electronic transitions) throughout the 0.35 to 1.8 micron range presumably due variable proportions of heavy lanthanide series rare earth elements (i.e., Dy, Er, Ho, and Yb?). (G. Swayze)

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1a2_3_4_ # GDS966 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns