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Clark et. al. 2003 USGS Open File Report 03-395
Spectral Library splib05a Sample Description

(For further information on spectrsocopy, see: http://speclab.cr.usgs.gov)

TITLE: Alun366+.50PyroPYS1A GDS222 DESCRIPT

DOCUMENTATION_FORMAT: MIXTURE

SAMPLE_ID: Alunite WS366 + Pyrophyllite PYS1A

MIXTURE_TYPE: Intimate

MIXTURE: alunite & pyrophyllite GDS222

FORMULA: KAl3(SO4)2(OH)6 + Al2Si4O10(OH)2

FORMULA_HTML: KAl3(SO4)2(OH)6 +Al2 Si4O10(OH)2

COLLECTION_LOCALITY: Alunite WS366, Marysvale UT, See Pyrophyllite PYS1A

ORIGINAL_DONOR: Ward Science Collection WS366, Jim Crowley PYS1A

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

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

SAMPLE_DESCRIPTION:

Intimate mixture of Alunite WS366 50wt% + 50wt% Pyrophyllite PYS1A

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

See pyrophyllite PYS1A, no data for WS366

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), ICP(Trace), WChem

COMPOSITIONAL_ANALYSIS:

NONE

COMPOSITION_TRACE:

COMPOSITION_DISCUSSION:

none

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

none

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectrum resembles that of alunite with a sharp band at 2.165 microns superimposed on the 2.17 micron alunite absorption. The 1.3934 micron pyrophyllite absorption is present in the 1.4 micron region as well as alunite absorptions at 1.4269 and 1.4780 microns.

END_SPECTROSCOPIC_DISCUSSION.

SPECTRAL_PURITY: 1b2_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: splib05a r 7190 0.2-3.0µm 200 g.s.=


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