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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: Galena HS37 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: HS37

MINERAL_TYPE: Sulfide

MINERAL: Galena

FORMULA: PbS

FORMULA_HTML: PbS

COLLECTION_LOCALITY: Galena, Kansas

ORIGINAL_DONOR: Hunt and Salisbury Collection

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

Forms series with Clausthalite.

Galena is usually pure, in the sense that substitution of other metal ions for lead is not very extensive. This sample appears quite pure, containing only a very minor amount of sphalerite. The largest size particles are opaque throughout the spectral region because of intense absorption in the conduction band which extends into the infrared.

Hunt, G.R., J.W. Salisbury, C.J. Lenhoff, 1971, Visible and Near-Infrared spectra of Minerals and Rocks: IV. Sulphides and Sulphates. Mod. Geol. 3, pp 1-14.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

Pure galena.

Konnert, Judith and Marta Flohr, 1992, unpublished data, USGS Reston, VA.

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

mode:
98 vol% galena
2 vol% sphalerite

avg. grain size = 290 µm

Cubic cleavage, gray metallic luster consistent with galena. G. Swayze.

END_MICROSCOPIC_EXAMINATION.

SPECTROSCOPIC_DISCUSSION:

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: splib04a r 1668 0.2-3.0µm 200 g.s.= 290 µm
LIB_SPECTRA: splib05a r 2711 0.2-3.0µm 200 g.s.=


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