DOCUMENTATION_FORMAT: MIXTURE
SAMPLE_ID: HS477.2B, HS477.4B, HS477.6
MIXTURE_TYPE: Intimate
MIXTURE: Covellite + Pyrite
FORMULA: CuS + FeS2
FORMULA_HTML: CuS + FeS2
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, EPMA, 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: 1b2b3b4b # HS477.2B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1b2_3_4_ # HS477.4B # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns
SPECTRAL_PURITY: 1b2_3_4_ # HS477.6 # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns