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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
For more information on the library, see: local link web link

TITLE: Nanohematite BR93-34B2 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: BR93-34B2

MINERAL_TYPE: Oxide

MINERAL: Nanohematite

FORMULA: Fe2O3

FORMULA_HTML: Fe2O3

COLLECTION_LOCALITY: Rodman Mountains, California

ORIGINAL_DONOR: Livo

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

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

SAMPLE_DESCRIPTION:

Hematite on quartzite, muscovite, kaolinite.

IMAGE_OF_SAMPLE:
Photo of sample

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

quartz(major), muscovite(minor), orthoclase(minor), albite(minor).

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:

Classic hematite spectrum with strong iron absorptions at 0.55 and 0.88 microns - with a slight shoulder at 0.66. The spectrum has a well formed muscovite feature with absorptions at 2.21, 2.35, and 2.45 microns.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2_3_4_ # BR93-34B2 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns