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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: Alum. 33+ Kaol. 33+ Musc. 33 AMX2 DESCRIPT

DOCUMENTATION_FORMAT: MIXTURE

SAMPLE_ID: AMX2

MIXTURE_TYPE: Areal

MIXTURE: Alunite HS295.3B+ well crystallized Kaolinite KGa-1+Muscovite CU91-250A

FORMULA: KAl3(SO4)2(OH)6 + Al2Si4O10(OH)2 + KAl2[AlSi3O10](OH,F)2

FORMULA_HTML: KAl3(SO4)2(OH)6 +Al2 Si4O10(OH)2 + KAl2[AlSi3O10] (OH,F)2

COLLECTION_LOCALITY: See Alunite HS295.3B, Kaolinite KGa-1, Muscovite CU91-250A

ORIGINAL_DONOR: See Alunite HS295.3B, Kaolinite KGa-1, Muscovite CU91-250A

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

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

SAMPLE_DESCRIPTION:

Alun. 33% +Kaol 33% + Musc 33% See HS295.3B, KGa-1 and CU91-250A

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

See HS295.3B, KGa-1 and CU91-250A

see:

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: EM(WDS) # XRF, EM(WDS), ICP(Trace), WChem

See HS295.3B, KGa-1 and CU91-250A

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

See HS295.3B, KGa-1 and CU91-250A

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

See HS295.3B, KGa-1 and CU91-250A

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

Spectrum resembles that of halloysite in the 2.2 micron region but has strong alunite absorptions near 1.45 and 1.7 microns.

END_SPECTROSCOPIC_DISCUSSION.

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

See HS295.3B, KGa-1 and CU91-250A

LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment
LIB_SPECTRA: splib05a r 7165 0.2-3.0µm 200 g.s.=


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