UM1981-13-S:CoFeNiRh
A material that is NOT an approved mineral species
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Formula:
(Fe,Ni,Rh,Co)9S8
Colour:
Light brown
Maybe just an impure pentlandite. In Pt-Fe alloy nuggets from Joubdo stream, Ethiopia. Found as (1) micron-sized blebs, (2) rounded inclusion, up to a l0 x 15 microns in size, or (3) lenticular inclusions, up to 25 x 110 microns in size, with angular and scalloped margins; the latter are associated with unnamed RhS phase and erlichmanite.
One of a few species from such Pt-Fe nuggets from Joubdo (compare, e.g., 'UM1981-08E:FeIrPtRhRu', 'UM1981-29-Te:BiRh', and the chemically similar 'UM1981-14-S:CuFeIrNiRh').
One of a few species from such Pt-Fe nuggets from Joubdo (compare, e.g., 'UM1981-08E:FeIrPtRhRu', 'UM1981-29-Te:BiRh', and the chemically similar 'UM1981-14-S:CuFeIrNiRh').
Unique Identifiers
Mindat ID:
47589
Long-form identifier:
mindat:1:1:47589:3
GUID
(UUID V4):
(UUID V4):
3fb5ba5a-6172-42e7-a3b0-e31fbd05a719
Physical Properties of UM1981-13-S:CoFeNiRh
Colour:
Light brown
Optical Data of UM1981-13-S:CoFeNiRh
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 39.7% | 30.2% |
| 420nm | 41.5% | 30.9% |
| 440nm | 42.6% | 31.4% |
| 460nm | 43.5% | 31.8% |
| 480nm | 44.3% | 32.1% |
| 500nm | 45.1% | 32.5% |
| 520nm | 45.9% | 33.0% |
| 540nm | 46.6% | 33.7% |
| 560nm | 47.4% | 34.5% |
| 580nm | 48.2% | 35.3% |
| 600nm | 48.9% | 35.9% |
| 620nm | 49.5% | 36.4% |
| 640nm | 50.1% | 36.9% |
| 660nm | 50.5% | 37.3% |
| 680nm | 50.9% | 37.7% |
| 700nm | 51.3% | 38.0% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 51.3%.
R1 shown in black, R2 shown in red
Comments:
Color values (air/oil): : 0.321/0.122 (x); 0.326/0.325 (y); 47.3/34.4 (Y); 579/579 (lambda d); 5.7/5.7 (Pe)
Chemical Properties of UM1981-13-S:CoFeNiRh
Formula:
(Fe,Ni,Rh,Co)9S8
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 UM1981-13-S:CoFeNiRh
mindat.org URL:
https://www.mindat.org/min-47589.html
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References for UM1981-13-S:CoFeNiRh
Reference List:
Localities for UM1981-13-S:CoFeNiRh
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The Locality List
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? - 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.
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All localities listed without proper references should be considered as questionable.
Ethiopia | |
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