UM1989-09-E:FeMnSi
A material that is NOT an approved mineral species
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Formula:
(Mn,Fe,Si)
Lustre:
Metallic
Possibly identical to 'manganese', which is also known from some Aldan alluvials. Alpha or beta phase of Mn.
Co-desribed with 'UM1989-03-C:FeMnSi', which forms exsolutions in the phase described; droplets of tephroite also occur within.
The phases constitute poorly rounded grains, 0.6-0.8 mm in diameter, with rough-textured surface (lizard-skin-like), found within nonmagnetic fraction of alluvial heavy-minerals concentrates.
Co-desribed with 'UM1989-03-C:FeMnSi', which forms exsolutions in the phase described; droplets of tephroite also occur within.
The phases constitute poorly rounded grains, 0.6-0.8 mm in diameter, with rough-textured surface (lizard-skin-like), found within nonmagnetic fraction of alluvial heavy-minerals concentrates.
Unique Identifiers
Mindat ID:
51622
Long-form identifier:
mindat:1:1:51622:4
GUID
(UUID V4):
(UUID V4):
c853c20d-446a-45bc-a1f4-693017f9c311
Physical Properties of UM1989-09-E:FeMnSi
Metallic
Comment:
concerns the whole grains
Hardness:
VHN100=908 - 1095 - Vickers
Comment:
microhardness (kg/mm2)
Optical Data of UM1989-09-E:FeMnSi
Reflectivity:
Wavelength | R |
---|---|
420nm | 54.1% |
440nm | 54.9% |
460nm | 55.8% |
480nm | 56.9% |
500nm | 57.8% |
520nm | 58.6% |
540nm | 59.2% |
560nm | 59.7% |
580nm | 60.1% |
600nm | 60.5% |
620nm | 61.0% |
640nm | 61.5% |
660nm | 61.9% |
680nm | 62.3% |
700nm | 63.0% |
720nm | 63.8% |
740nm | 64.4% |
760nm | 64.9% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 64.9%.
Colour in reflected light:
steel-gray with a creamy tint (the whole grains)
Chemistry of UM1989-09-E:FeMnSi
Mindat Formula:
(Mn,Fe,Si)
Elements listed:
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.105 Γ | (100) |
1.998 Γ | (90) |
1.909 Γ | (40) |
1.691 Γ | (30) |
1.170 Γ | (40) |
Comments:
mixture (host + exsolved phase)
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 UM1989-09-E:FeMnSi
mindat.org URL:
https://www.mindat.org/min-51622.html
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References for UM1989-09-E:FeMnSi
Reference List:
Localities for UM1989-09-E:FeMnSi
β - 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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Russia | |
| Kim et al. (1989) +1 other reference |
Kim et al. (1989) +1 other reference | |
Kim et al. (1989) +1 other reference |