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.

END_SAMPLE_DESCRIPTION.

XRD_ANALYSIS:

None

END_XRD_ANALYSIS.

COMPOSITIONAL_ANALYSIS_TYPE: None # XRF, EM(WDS), 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: 1_2_3_4_

LIB_SPECTRA_HED: where Wave Range Av_Rs_Pwr Comment

LIB_SPECTRA: splib04a r 915 0.2-3.0µm 200 g.s.=

LIB_SPECTRA: splib05a r ____ 0.2-3.0µm 200 g.s.=

LIB_SPECTRA: splib06a r ____ 1.5-25µm 250 g.s.=