UM2003-19-S:CuFe
Valid as an unnamed mineral
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Formula:
(Cu0.96K0.04)(Fe0.6Cu0.4)(S1.98O0.02)
may likely be simplified as Cu(Fe0.6Cu0.4)S2 or Cu(Fe,Cu)S2
Co-described with UM2003-18-S:CuFeHNaO. Seems to be the only known species with NaOH inclusion (if true).
Occurs intergrown with djerfisherite. Both occur with natrite, natrophosphate, thermonatrite, and villiaumite, in a "salt" core of an hyperagpaitic pegmatite.
Note: the abstract does not clearly specify how this phase differs from chalcopyrite. Although the cleavage characteristics is different, both the PXRD pattern and the unit cell parameters are very similar (so is true for the general formula).
EPMA data [wt.%]:
K 0.69 (0.61–0.77)
Na 0.13(n.d.–0.13)
Cu 44.82 (44.82–47.70)
Fe 19.39 (17.42–19.39
As n.d. (n.d.–0.09)
S 33.65 (32.14–33.65)
total 98.74 (96.99–98.74)
Occurs intergrown with djerfisherite. Both occur with natrite, natrophosphate, thermonatrite, and villiaumite, in a "salt" core of an hyperagpaitic pegmatite.
Note: the abstract does not clearly specify how this phase differs from chalcopyrite. Although the cleavage characteristics is different, both the PXRD pattern and the unit cell parameters are very similar (so is true for the general formula).
EPMA data [wt.%]:
K 0.69 (0.61–0.77)
Na 0.13(n.d.–0.13)
Cu 44.82 (44.82–47.70)
Fe 19.39 (17.42–19.39
As n.d. (n.d.–0.09)
S 33.65 (32.14–33.65)
total 98.74 (96.99–98.74)
Unique Identifiers
Mindat ID:
54444
Long-form identifier:
mindat:1:1:54444:9
Similar Names
| UM1970-24-S:CuFe | (Fe,Cu)S | |
| UM1970-25-S:CuFeH | A synonym of Ferrovalleriite | 2(Fe,Cu)S · 1.5Fe(OH)2 |
| UM1974-16-Se:CoFe | (Co,Fe)S2 | |
| UM1976-15-S:CuSe | Cu4(S,Se)3 | |
| UM1979-02-AsO:CuFe | Cu-Fe-Ca-As-Sb-O | |
| UM1981-12-S:CoFe | ~(Co,Fe)4S3 | |
| UM1983-12-S:CuFe | Cu2FeS3 | |
| UM1986-42-S:CuFe | Cu2Fe3S5 | |
| UM1987-10-S:AgFe | Ag2Fe15S20 | |
| UM1988-17-S:CuFe | Cu7Fe8S16 | |
| UM1988-18-S:CuFe | Cu5Fe9S14 | |
| UM1990-101-S:CuFeK | KCu+19Cu182+Fe102+S38 | |
| UM1994-22-S:CuFe | CuFe3S4 | |
| UM2002-12-OS:CuFe | ~(Cu,Fe)SO ? |
IMA Classification of UM2003-19-S:CuFe
IMA status notes:
Unnamed (probably valid)
Physical Properties of UM2003-19-S:CuFe
Hardness:
VHN5=140 kg/mm2 - Vickers
Cleavage:
Perfect
lamellar
lamellar
Optical Data of UM2003-19-S:CuFe
Anisotropism:
weak
Bireflectance:
weak
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 460nm | 12.6% | 12.7% |
| 540nm | 15.4% | 16.2% |
| 580nm | 18.0% | 19.1% |
| 660nm | 23.6% | 24.8% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 24.8%.
R1 shown in black, R2 shown in red
Colour in reflected light:
lilac-yellow to gray
Chemistry of UM2003-19-S:CuFe
Mindat Formula:
(Cu0.96K0.04)(Fe0.6Cu0.4)(S1.98O0.02)
may likely be simplified as Cu(Fe0.6Cu0.4)S2 or Cu(Fe,Cu)S2
may likely be simplified as Cu(Fe0.6Cu0.4)S2 or Cu(Fe,Cu)S2
Element Weights:
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.05 Å | (100) |
| 2.654 Å | (20) |
| 1.870 Å | (90) |
| 1.596 Å | (50) |
| 1.328 Å | (10 |
| 1.214 Å | (20) |
| 1.082 Å | (30) |
Comments:
same data for the other unnamed associate, as both are very similar (and also similar in this matter to chalcopyrite)
Radioactivity
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for UM2003-19-S:CuFe
mindat.org URL:
https://www.mindat.org/min-54444.html
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References for UM2003-19-S:CuFe
Reference List:
Localities for UM2003-19-S:CuFe
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Russia | |
| Khomyakov et al. (2003) +1 other reference |
