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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: Covellite HS477 DESCRIPT

DOCUMENTATION_FORMAT: MINERAL

SAMPLE_ID: HS477

MINERAL_TYPE: Sulfide

MINERAL: Covellite

FORMULA: CuS

FORMULA_HTML: CuS

COLLECTION_LOCALITY: Montana

ORIGINAL_DONOR: Hunt and Salisbury Collection

CURRENT_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

ULTIMATE_SAMPLE_LOCATION: USGS Denver Spectroscopy Laboratory

SAMPLE_DESCRIPTION:

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

40 kV - 30 mA, 7.3-9.5 keV
File: covel477_mdi, *.out (smear mount on quartz plate)
References: JCPDS #6-464, #42-1340; Huebner's reference patterns
Found: Covellite, subequal pyrite, unidentified moderate to weak reflections at 4.72, 3.99, 3.70, 2.84, and 1.857 angstroms

Comment: Covellite and pyrite reflections are sharp suggesting a good degree of crystallinity and, in the case of covellite, compositional heterogeneity. Additional reflections (6) are of weak to moderate intensity and have not been identified - they may represent two or more phases. Needs more work.

HS477.2B Covellite 40 kV - 30 mA, 7.3-9.5 keV File: covel477.mdi, *.out (smear mount on quartz plate) References-. JCPDS #6-464, #42-1340; Huebner's reference patterns Found: Covellite, subequal pyrite, unidentified moderate to weak reflections at 4.72, 3.99, 3.70, 2.84, and 1.857 A Comment: Covellite and pyrite reflections are sharp suggesting a good degree of crystallinity and, in the case of covellite, compositional heterogeneity. Additional reflections (6) are of weak to moderate intensity and have not been identified - they may represent two or more phases. Needs more work.

END_XRD_ANALYSIS.

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

COMPOSITION_TRACE: None

COMPOSITION_DISCUSSION:

END_COMPOSITION_DISCUSSION.

MICROSCOPIC_EXAMINATION:

Lead gray metallic luster, trace white impurities. 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 1292 0.2-3.0µm 200 g.s.= 17 µm
LIB_SPECTRA: splib05a r 2261 0.2-3.0µm 200 g.s.=


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