Covellite-Pyrite

Spectrum Details

Modality

NIR

Category

soil

Material Type

Intimate

Sample ID

HS477.2B, HS477.4B, HS477.6

Collection Locality

Montana

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

Composition / XRD

None # XRF, EPMA, ICP(Trace), WChem

Sample Description

IMAGE_OF_SAMPLE:

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.

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126