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DOCUMENTATION_FORMAT: MINERAL
SAMPLE_ID: S26-36
MINERAL_TYPE: Sulfide
MINERAL: Chalcopyrite (Chalcopyrite group)
FORMULA: CuFeS2
FORMULA_HTML: CuFeS2
COLLECTION_LOCALITY: Ellenville (Ulster) Mine, Ellenville, New York
ORIGINAL_DONOR: Jules Friedman
CURRENT_SAMPLE_LOCATION: USGS Reston, VA
ULTIMATE_SAMPLE_LOCATION: USGS Reston, VA
SAMPLE_DESCRIPTION:
Forms series with Eskebornite.
Composition deviates very little from ideal CuFeS2. Its structure
can be regarded as a derivative of the sphalerite structure in which
half the Zn is replaced by Cu and the other half by Fe. This leads to a
doubling of the unit cell.
NOTE: For specific sample information refer to the following reference: Friedman, J. D., Mutschler, F. E., Zartman, R. E., Briggs, P. H., Swayze, G. A., Theisen, A. F., 1989, Shawangunk Ore District, New York: Geochemical and Spectral Data, U.S. Geological Survey Open File Report 89-193.
IMAGE_OF_SAMPLE:
NO PHOTO
END_SAMPLE_DESCRIPTION.
XRD_ANALYSIS:
Not Available
END_XRD_ANALYSIS.
COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EPMA, ICP(Trace), WChem
COMPOSITION_TRACE: None
COMPOSITION_DISCUSSION:
NOTE: For specific sample information refer to the following reference: Friedman, Jules D., Mutschler, Felix E., Zartman, Robert E., Briggs, Paul H., Swayze, Gregg A., Theisen, Arnold F., 1989, Shawangunk Ore District, New York: Geochemical and Spectral Data, U.S. Geological Survey Open File Report 89-193.
END_COMPOSITION_DISCUSSION.
MICROSCOPIC_EXAMINATION:
mode by wt%:
99 wt% chalcopyrite
1 wt% sphalerite
Whole rock sample
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