UM1986-30-S:AgBiCuPb
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Formula:
(Cu,Ag)Pb6Bi7S17
Colour:
lead gray
Lustre:
Metallic
Specific Gravity:
7.04 (Calculated)
Crystal System:
Orthorhombic
As grains, long tabular or elongate and diamond-shaped, up to 0.72 mm (usually 0.03-0.4 mm), intergrown with or as inclusions in chalcopyrite; associated minerals include galena, hessite, matildite, pyrite, silver, sphalerite, and two unnamed Pb-Bi-Ag-Cu sulfosalts.
The mineral is said to be compositionally similar to aikinite-bismuthinite series and to "Phase x" of Karup-Møller (Can. Mineral. 1970: 10 173-190).
The loality is reported as "Laiyun copper-iron deposit".
The mineral is said to be compositionally similar to aikinite-bismuthinite series and to "Phase x" of Karup-Møller (Can. Mineral. 1970: 10 173-190).
The loality is reported as "Laiyun copper-iron deposit".
Unique Identifiers
Mindat ID:
50262
Long-form identifier:
mindat:1:1:50262:9
Similar Names
| UM1971-07-S:AgBiCuPb | Pb(Cu,Ag)2.2Bi4.6S7.7 | |
| UM1971-08-S:AgBiCuPb | ~(Cu,Ag,Pb)3Bi7S12 | |
| UM1971-09-S:AgBiCuPb | Ag4Cu6Bi12Pb18S41 | |
| UM1971-10-S:AgBiCuPb | Ag5Cu2PbBi13S24 | |
| UM1971-11-S:AgBiCuPb | (Ag,Cu)4PbBi6S12 | |
| UM1986-28-S:AgBiCuPb | Ag1.7CuPb0.7Bi10S15.6 | |
| UM1986-29-S:AgBiCuPb | (Ag,Cu)2.07Pb2.1Bi10S18.2 | |
| UM1986-32-S:AgBiCuPb | Ag1.5Cu1.7Pb0.3Bi10S16.1 | |
| UM1998-12-S:AgBiCuPb | Ag5CuBi4Pb(S,Se)11 | |
| UM2001-12-S:AgBiCuPb | Cu2AgxPb10-2xBi12+xS29 (x=1.23-1.49) |
Physical Properties of UM1986-30-S:AgBiCuPb
Metallic
Colour:
Lead gray
Hardness:
VHN100=158.36 kg/mm2 - Vickers
Cleavage:
Imperfect/Fair
Density:
7.04 g/cm3 (Calculated)
Optical Data of UM1986-30-S:AgBiCuPb
Anisotropism:
distinct, bluish gray to light brownish gray polarization colours
Bireflectance:
negligible to weak
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 406nm | 42.2% | 44.6% |
| 438nm | 42.3% | 45.0% |
| 481nm | 41.5% | 44.6% |
| 491nm | 40.9% | 43.9% |
| 543nm | 39.7% | 42.7% |
| 592nm | 39.1% | 41.7% |
| 615nm | 39.2% | 42.3% |
| 645nm | 38.4% | 41.4% |
| 659nm | 39.0% | 42.5% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 45.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
white with bluish tint
Chemistry of UM1986-30-S:AgBiCuPb
Mindat Formula:
(Cu,Ag)Pb6Bi7S17
Element Weights:
Crystallography of UM1986-30-S:AgBiCuPb
Crystal System:
Orthorhombic
Cell Parameters:
a = 8.81 Å, b = 13.06 Å, c = 7.106 Å
Ratio:
a:b:c = 0.675 : 1 : 0.544
Unit Cell V:
817.61 ų (Calculated from Unit Cell)
Z:
1
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.428 Å | (100) |
| 3.059 Å | (40) |
| 2.996 Å | (90) |
| 2.765 Å | (50) |
| 2.247 Å | (40) |
| 2.137 Å | (30) |
| 2.023 Å | (30) |
| 1.895 Å | (30) |
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 UM1986-30-S:AgBiCuPb
mindat.org URL:
https://www.mindat.org/min-50262.html
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References for UM1986-30-S:AgBiCuPb
Reference List:
Yunqing Yi, Jingui Zhang, Rub Zhang, Chongliang Du (1986) An unnamed sulfosalt mineral - Pb6Bi7(Cu,Ag)S17. Kuangwu Xuebao [Acta Mineralogica Sinica]: 6(4): 338-343 (in Chinese, English abstract)(Abs. in: Jambor, J.L., Vanko, D.A. (1990): New mineral Names. American Mineralogist: 75: 712)
Localities for UM1986-30-S:AgBiCuPb
ⓘ - 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.
- 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.
China | |
| Yunqing Yi et al. (1986) +1 other reference |
