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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: Erionite+Merlinoite GDS144 DESCRIPT

DOCUMENTATION_FORMAT: MIXTURE

SAMPLE_ID: GDS144

MIXTURE_TYPE: Intimate

MIXTURE: Erionite and Merlinoite (Zeolite group)

FORMULA: (K2Na2Ca,Mg)2[Al4Si14O36]·15H2O and (K,Na)5(Ca,Ba)2[(Al9Si23)O64]·22H2O

FORMULA_HTML: (K2Na2Ca,Mg)2[Al4Si14O36]·15H2O and

COLLECTION_LOCALITY: Eureka Co., Nevada?

ORIGINAL_DONOR: Jim Crowley

CURRENT_SAMPLE_LOCATION: USGS Reston, Virginia

ULTIMATE_SAMPLE_LOCATION: USGS Reston, Virginia

SAMPLE_DESCRIPTION:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Erionite with Merlinoite as a major contaminant.
Jim Crowley, 1993, personal communication.

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

None

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

There is significant interference from goethite to weak features in the 1-micron region. Thus the spectral purity rating is a c, but rates an a in the 1.7 to 3 micron region.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1c2b3b4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns