Pearceite R090041
Name: Pearceite
RRUFF ID: R090041
Ideal Chemistry: Cu(Ag,Cu)6Ag9As2S11
Locality: Uchucchacua mine, Oyon Province, Lima Department, Peru
Source: Tony Jones
Owner: RRUFF
Description: Aggregates of black hexagonal plates, X-ray diffraction indicates that it is type T2ac. Chemistry has not yet been completed to determine mineral identity with certainty.
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Quick search: [ All Pearceite samples (4) ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Sample. Unable to collect valid spectra under laser 532 nm because sample burns at every power level. Under laser 780 nm, at 10% power, defocused, sample still slightly burns, though at 1%, spectra do not show Raman peaks.
Instrument settings: Thermo Almega XR 780nm @ 10% of 600mW
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Raman Data (Processed)
RRUFF File
Raman Data (RAW) View Graph
RRUFF File
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R090041
Wavelength:
Sample Description: Unoriented Sample. Unable to collect valid spectra under laser 532 nm because sample burns at every power level. Under laser 780 nm, at 10% power, defocused, sample still slightly burns, though at 1%, spectra do not show Raman peaks.
Instrument settings: Thermo Almega XR 780nm @ 10% of 600mW
DOWNLOADS:

Raman Data (Processed)
RRUFF File
Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R090041.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 14.883(6)Å    b: 14.883(6)Å    c: 11.985(7)Å
alpha: 90°    beta: 90°    gamma: 120°   Volume: 2299.1(8)    Crystal System: hexagonal
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REFERENCES for Pearceite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Rose H (1829) Ueber die in der natur corkommenden nicht oxydirten verbindungen des antimons und des arseniks, Annalen der Physik und Chemie, 1829, 573-592   [view file]

Penfield S L (1896) On pearceite, a sulpharsenite of silver and on the crystallization of polybasite, American Journal of Science, 152, 17-29   [view file]

Frondel C (1963) Isodimorphism of the polybasite and pearceite series, American Mineralogist, 48, 565-572   [view file]

Fleischer M (1965) New mineral names, American Mineralogist, 50, 1504-1508   [view file]

Hall H T (1967) The pearceite and polybasite series, American Mineralogist, 52, 1311-1321   [view file]

Edenharter A, Koto K, Nowacki W (1971) Über pearceit, polybasit und binnit, Neues Jahrbuch für Mineralogie, Monatshefte, 1971, 337-341

Bailey S W (1977) Report of the I.M.A-I.U.Cr. Joint Committee on Nomenclature, American Mineralogist, 62, 411-415   [view file]

Bindi L, Evain M, Menchetti S (2006) Temperature dependence of the silver distribution in the crystal structure of natural pearcite, (Ag,Cu)16(As,Sb)2S11, Acta Crystallographica, B62, 212-219

Locock A J, Ercit T S, Kjellman J, Piilonen C (2006) New mineral names, American Mineralogist, 91, 1945-1954   [view file]

Bindi L, Evain M, Spry P G, Menchetti S (2007) The pearceite-polybasite group of minerals: crystal chemistry and new nomenclature rules, American Mineralogist, 92, 918-925   [view file]