UM2000-44-S:AgAsPbSb
Valid as an unnamed mineral
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Formula:
Pb9Ag(Sb,As)13S29
Specific Gravity:
5.51 (Calculated)
Crystal System:
Monoclinic
Co-described with UM2000-45-S:AgAsSb, UM1982-10-S:AsSbTl and UM1970-20-S:AsSbTl.
As acicular crystals, in aggregates with zinkenite.
Electron microprobe data, wt.%:
Pb 43.6
Tl 3.1
Ag 2.6
Sb 22.4
As 8.5
S 20.8
total 101.0
This corresponds to (Pb9.15Tl0.66)Σ9.81Ag1.05(Sb8.00As4.93)Σ12.93S28.21.
As acicular crystals, in aggregates with zinkenite.
Electron microprobe data, wt.%:
Pb 43.6
Tl 3.1
Ag 2.6
Sb 22.4
As 8.5
S 20.8
total 101.0
This corresponds to (Pb9.15Tl0.66)Σ9.81Ag1.05(Sb8.00As4.93)Σ12.93S28.21.
Unique Identifiers
Mindat ID:
54208
Long-form identifier:
mindat:1:1:54208:9
IMA Classification of UM2000-44-S:AgAsPbSb
IMA status notes:
Unnamed (probably valid)
Physical Properties of UM2000-44-S:AgAsPbSb
Hardness:
VHN25=157 - 170 kg/mm2 - Vickers
Comment:
Mean VHN is 165
Density:
5.51 g/cm3 (Calculated)
Optical Data of UM2000-44-S:AgAsPbSb
Anisotropism:
strong, polarization colors from brown to deep blue
Bireflectance:
readily observable, gray tints
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 460nm | 42.5% | 37.1% |
| 540nm | 40.4% | 35.9% |
| 580nm | 39.3% | 33.9% |
| 660nm | 36.2% | 31.4% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 42.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:
white; white-gray in oil
Internal Reflections:
rare, purple-red
Chemistry of UM2000-44-S:AgAsPbSb
Mindat Formula:
Pb9Ag(Sb,As)13S29
Element Weights:
Crystallography of UM2000-44-S:AgAsPbSb
Crystal System:
Monoclinic
Cell Parameters:
a = 17.640(8) Å, b = 18.464(8) Å, c = 3.967(3) Å
β = 90.8°
β = 90.8°
Ratio:
a:b:c = 0.955 : 1 : 0.215
Unit Cell V:
1,291.95 ų (Calculated from Unit Cell)
Z:
1
Twinning:
some crystals are twinned parallel to their elongation
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.406 Å | (100) |
| 2.960 Å | (80) |
| 2.821 Å | (70) |
| 2.730 Å | (70) |
| 2.089 Å | (80) |
| 1.866 Å | (60) |
Locality:
Comments:
pattern similar to that of jamesonite
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 UM2000-44-S:AgAsPbSb
mindat.org URL:
https://www.mindat.org/min-54208.html
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References for UM2000-44-S:AgAsPbSb
Reference List:
Johan, Z., Mantienne, J. (2000) Thallium-rich mineralization at Jas Roux, Hautes-Alpes, France: A complex epithermal, sediment-hosted, ore-forming system. Journal of the Czech Geological Society, 45 (1-2) 63-77 (Abs. in: Jambor, J.L., Roberts, A.C (2000): New mineral names. Am. Min.: 86(7-8): 941.)
Localities for UM2000-44-S:AgAsPbSb
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.
France | |
| Johan et al. (2000) +1 other reference |
