UM2002-12-OS:CuFe
Valid as an unnamed mineral
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Formula:
~(Cu,Fe)SO ?
recasting the below wt.% data with any factors based on (K+Cu+Fe), (Cu+Fe), (S+O), or (K+Cu+Fe+S+O) and assuming various valencies of Cu and Fe does not give any result with neutral charge; as such, the above formula proposal may be wrong (possibly the sulfide bears water, or the below EPMA data concerns a mixture) (Ł.K.)
Possibly a Cu-Fe oxysulfide. Co-described with UM1990-101-S:CuFeK.
In form of millimetre-sized, platy aggregates cutting chalcopyrite and concentrated in its interstices.
EPMA results [wt.%], example analysis, with range of 10 analyses in parentheses, O by difference:
K 0.07 (0.07–0.39)
Fe 21.02 (13.99–23.86)
Cu 40.53 (33.78–41.34)
S 27.11 (25.50–33.74)
total 88.73 (78.10–92.55)
In form of millimetre-sized, platy aggregates cutting chalcopyrite and concentrated in its interstices.
EPMA results [wt.%], example analysis, with range of 10 analyses in parentheses, O by difference:
K 0.07 (0.07–0.39)
Fe 21.02 (13.99–23.86)
Cu 40.53 (33.78–41.34)
S 27.11 (25.50–33.74)
total 88.73 (78.10–92.55)
Unique Identifiers
Mindat ID:
54317
Long-form identifier:
mindat:1:1:54317:6
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 | |
| 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 | |
| UM1994-22-S:CuFe | CuFe3S4 | |
| UM2003-19-S:CuFe | (Cu0.96K0.04)(Fe0.6Cu0.4)(S1.98O0.02) |
IMA Classification of UM2002-12-OS:CuFe
IMA status notes:
Unnamed (probably valid)
Optical Data of UM2002-12-OS:CuFe
Anisotropism:
intense
Bireflectance:
intense
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 470nm | 18.0% | 19.9% |
| 546nm | 26.2% | 31.4% |
| 589nm | 28.7% | 34.3% |
| 650nm | 31.2% | 36.1% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 36.1%.
R1 shown in black, R2 shown in red
Colour in reflected light:
bronze-yellow to gray
Comments:
yellow-orange to blue and dark blue rotation tints
Chemistry of UM2002-12-OS:CuFe
Mindat Formula:
~(Cu,Fe)SO ?
recasting the below wt.% data with any factors based on (K+Cu+Fe), (Cu+Fe), (S+O), or (K+Cu+Fe+S+O) and assuming various valencies of Cu and Fe does not give any result with neutral charge; as such, the above formula proposal may be wrong (possibly the sulfide bears water, or the below EPMA data concerns a mixture) (Ł.K.)
recasting the below wt.% data with any factors based on (K+Cu+Fe), (Cu+Fe), (S+O), or (K+Cu+Fe+S+O) and assuming various valencies of Cu and Fe does not give any result with neutral charge; as such, the above formula proposal may be wrong (possibly the sulfide bears water, or the below EPMA data concerns a mixture) (Ł.K.)
Element Weights:
Elements listed:
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 UM2002-12-OS:CuFe
mindat.org URL:
https://www.mindat.org/min-54317.html
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References for UM2002-12-OS:CuFe
Reference List:
Localities for UM2002-12-OS: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 | |
| Lisitsyn et al. (2002) +1 other reference |
