UM1981-08-E:FeIrPtRhRu
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Formula:
Ir-Fe-Pt-Rh-Ru-O-H ?
Colour:
dark grey (reflected light?)
Low totals are suggestible, according to Smith & Nickel (2007), of the presence of oxygen; calculation (Ł. K.) including oxygen alone shows metal-to-oxygen ratio from ~1:3 (analysis 1) to 1:4 (analysis 2), which would require very high oxidation states; assuming even the highest possible states does not balance the charge. Calculation assuming the phase to be of oxide-hydroxide type gives better results. However, recalculation as (Ir,Fe,...)O(OH) still leaves low totals. Thus, the phase is possibly also hydrated. If so, it might correspond to already database-present
'Unnamed (Ir Oxide-Hydroxide)'.
Discovered as an alteration product replacing (even completely) euhedral osmium inclusions in nuggets of Pt-Fe alloy from the Joubdo stream, Ethiopia. Compare 'UM1981-29-Te:BiRh' from the same site.
'Unnamed (Ir Oxide-Hydroxide)'.
Discovered as an alteration product replacing (even completely) euhedral osmium inclusions in nuggets of Pt-Fe alloy from the Joubdo stream, Ethiopia. Compare 'UM1981-29-Te:BiRh' from the same site.
Unique Identifiers
Mindat ID:
47574
Long-form identifier:
mindat:1:1:47574:1
Physical Properties of UM1981-08-E:FeIrPtRhRu
Colour:
Dark grey (reflected light?)
Optical Data of UM1981-08-E:FeIrPtRhRu
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 18.2% | 7.5% |
| 420nm | 18.2% | 7.4% |
| 440nm | 18.1% | 7.2% |
| 460nm | 18.1% | 7.1% |
| 480nm | 18.0% | 7.0% |
| 500nm | 17.9% | 6.9% |
| 520nm | 17.9% | 6.8% |
| 540nm | 17.8% | 6.8% |
| 560nm | 17.8% | 6.7% |
| 580nm | 17.8% | 6.7% |
| 600nm | 17.7% | 6.7% |
| 620nm | 17.7% | 6.7% |
| 640nm | 17.7% | 6.7% |
| 660nm | 17.7% | 6.6% |
| 680nm | 17.7% | 6.6% |
| 700nm | 17.7% | 6.6% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 18.2%.
R1 shown in black, R2 shown in red
Internal Reflections:
present
Comments:
Color values (air/oil): 0.309/0.305 (x); 0.315/0.310 (y); 17.8/6.8 (Y); 478/474 (lambda d); 0.8/2.8 (Pe)
Chemistry of UM1981-08-E:FeIrPtRhRu
Mindat Formula:
Ir-Fe-Pt-Rh-Ru-O-H ?
Element Weights:
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 UM1981-08-E:FeIrPtRhRu
mindat.org URL:
https://www.mindat.org/min-47574.html
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References for UM1981-08-E:FeIrPtRhRu
Reference List:
Cabri, Louis J., Criddle, Alan J., Laflamme, J. H. Gilles, Bearne, Graham S., Harris, Donald C. (1981) Mineralogical study of complex Pt-Fe nuggets from Ethiopia. Bulletin de Minéralogie, 104 (4) 508-525 doi:10.3406/bulmi.1981.7501(Abs. in: Fleischer, M., Cabri, L.J., Chao, G.Y., Mandarino, J.A., Pabst, A. (1982): New mineral names. American Mineralogist: 67: 1079)
Localities for UM1981-08-E:FeIrPtRhRu
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.
Ethiopia | |
| Cabri et al. (1981) +1 other reference |
