Crookesite R061025

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Name: Crookesite
RRUFF ID: R061025
Ideal Chemistry: Cu7TlSe4
Locality: Skrikerum mine, Ostergotland, Sweden
Source: Michael Scott S101468 [view label]
Owner: RRUFF
Description: Lead gray metallic massive associated with umangite
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
CHEMISTRY 
RRUFF ID: R061025.2
Sample Description: Microprobe Fragment
Measured Chemistry: Cu7.01Tl0.99Se4.00 ; (light phase) Tl not measured but estimated by difference and stoichiometry ; the dark phase is Cu3.00Se2.00 (umangite, with trace amounts of S)
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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RRUFF ID: R061025
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R061025.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 10.414(8)Å    b: 10.414(8)Å    c: 3.927(2)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 425.9(3)Å3    Crystal System: tetragonal
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Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
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REFERENCES for Crookesite

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]

Nordenskiöld A E (1867) Sur les minéraux sélénifères et thallifères de Skrikerum, Bulletin Mensuel de la Société Chimique de Paris, 7, 409-414   [view file]

Earley J W (1950) Description and synthesis of the selenide minerals, American Mineralogist, 35, 337-364   [view file]

Berger R A (1987) Crookesite and sabatierite in a new light - A crystallographer's comment, Zeitschrift für Kristallographie, 181, 241-249   [view file]

Johan Z (1987) La crookesite, TlCu7Se4: nouvelles données et isotypie avec NH4Cu7S4, Comptes Rendus de l'Académie des Sciences de Paris, 304, 1121-1124

Jambor J L, Bladh K W, Ercit T S, Grice J D, Grew E S (1988) New mineral names, American Mineralogist, 73, 927-935   [view file]

Jambor J L, Burke E A J (1989) New mineral names, American Mineralogist, 74, 1399-1404   [view file]

Eriksson L, Werner P E, Berger R, Meerschaut A (1991) Structure refinement of TlCu7Se4 from X-ray powder profile data, Journal of Solid State Chemistry, 90, 61-68