Padĕraite
A valid IMA mineral species
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About Padĕraite
Formula:
Cu7[(Cu,Ag)0.33Pb1.33Bi11.33]S22
Cook & Ciobanu (2003) suggest the formula Cu7(Ag0.4Pb1.2)∑1.6Bi11.4S22
Colour:
Grey
Lustre:
Metallic
Hardness:
4
Specific Gravity:
6.80 (Calculated)
Crystal System:
Monoclinic
Name:
Named by W.G. Mumme and L. Žák in 1985 in honor of Karel Padĕra (5 May, 1923 - 2010), Czech mineralogist, Charles University, Prague who first worked on the mineral.
Type Locality:
This page provides mineralogical data about Padĕraite.
Name Encoding
CP1252:
Paderaite
Latin-1:
Paderaite
ASCII-7:
Paderaite
Unique Identifiers
Mindat ID:
3059
Long-form identifier:
mindat:1:1:3059:1
Similar Names
IMA Classification of Padĕraite
Approved
IMA Formula:
Cu1+7(Cu1+,Ag1+)0.33Pb2+1.33Bi3+11.33S2-22
Classification of Padĕraite
2.JA.10e
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
A : Galena derivatives with little or no Pb
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
A : Galena derivatives with little or no Pb
3.8.4.2
3 : SULFOSALTS
8 : 1 < ø < 2
3 : SULFOSALTS
8 : 1 < ø < 2
5.7.45
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
7 : Sulpharsenites etc. of Pb and other metals
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
7 : Sulpharsenites etc. of Pb and other metals
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Pdĕ | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Pad | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Padĕraite
Metallic
Transparency:
Opaque
Colour:
Grey
Comment:
Steel-gray on fresh fractures, turning brown to black;
Hardness:
4 on Mohs scale
Fracture:
Irregular/Uneven
Density:
6.80(10) g/cm3 (Calculated)
Optical Data of Padĕraite
Anisotropism:
moderate
Colour in reflected light:
creamy white
Chemistry of Padĕraite
Mindat Formula:
Cu7[(Cu,Ag)0.33Pb1.33Bi11.33]S22
Cook & Ciobanu (2003) suggest the formula Cu7(Ag0.4Pb1.2)∑1.6Bi11.4S22
Cook & Ciobanu (2003) suggest the formula Cu7(Ag0.4Pb1.2)∑1.6Bi11.4S22
Element Weights:
Crystallography of Padĕraite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 28.423(3) Å, b = 3.9426(4) Å, c = 17.573(2) Å
β = 105.525(2)°
β = 105.525(2)°
Ratio:
a:b:c = 7.209 : 1 : 4.457
Unit Cell V:
1,897.39 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Platy fragments, in granular to parallel fibrous aggregates, to several mm.
Comment:
Silver free
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.06 Å | (100) |
| 3.63 Å | (74) |
| 3.21 Å | (61) |
| 2.85 Å | (43) |
| 2.66 Å | (38) |
| 3.18 Å | (34) |
| 2.19 Å | (30) |
Comments:
Calculated from structure.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Padĕraite
Place of Conservation of Type Material:
Charles University, Prague, Czech Republic, 11329; National Museum of Natural History, Washington, D.C., USA, 164244.
Associated Minerals at Type Locality:
Other Language Names for Padĕraite
Common Associates
Associations Based on Photo Data:
| 1 photo of Padĕraite associated with Hodrušite | Cu8Bi12S22 |
| 1 photo of Padĕraite associated with Bismuthinite | Bi2S3 |
| 1 photo of Padĕraite associated with Emplectite | CuBiS2 |
| 1 photo of Padĕraite associated with Gladite | CuPbBi5S9 |
Related Minerals - Strunz-mindat Grouping
| 2.JA. | Ferdowsiite | Ag8(Sb5As3)S16 |
| 2.JA. | Luboržákite | Mn2AsSbS5 |
| 2.JA. | Sangenaroite | Ag8(Sb8-xAsx)SΣ16 |
| 2.JA.05a | Pavonite | AgBi3S5 |
| 2.JA.05b | Grumiplucite | HgBi2S4 |
| 2.JA.05c | Kudriavite | (Cd,Pb)Bi2S4 |
| 2.JA.05d | Cupromakovickyite | Cu4AgPb2Bi9S18 |
| 2.JA.05e | Benjaminite | Ag3Bi7S12 |
| 2.JA.05i | Livingstonite | HgSb4S6(S2) |
| 2.JA.05h | Mozgovaite | PbBi4S7 |
| 2.JA.05 | Dantopaite | Ag5Bi13S22 |
| 2.JA.05a | Cupropavonite | Cu0.9Ag0.5Pb0.6Bi2.5S5 |
| 2.JA.05 | Selenodantopaite | Ag5Bi13Se22 |
| 2.JA.05g | Borodaevite | Ag5(Bi,Pb,Fe)8(Sb,Bi)2S17 |
| 2.JA.05a | Cupromakopavonite | Ag3Cu8Pb4Bi19S38 |
| 2.JA.05d | Makovickyite | Cu1.12Ag0.81Pb0.27Bi5.35S9 |
| 2.JA.05f | Mummeite | Cu0.58Ag3.11Pb1.10Bi6.65S13 |
| 2.JA.10b | Kupčíkite | Cu3.4Fe0.6Bi5S10 |
| 2.JA.10d | Pizgrischite | (Cu,Fe)Cu14PbBi17S35 |
| 2.JA.10c | Hodrušite | Cu8Bi12S22 |
| 2.JA.10a | Cuprobismutite | Cu8AgBi13S24 |
| 2.JA.15 | Schapbachite | Ag0.4Pb0.2Bi0.4S |
| 2.JA.15 | Cuboargyrite | AgSbS2 |
| 2.JA.20 | Matildite | AgBiS2 |
| 2.JA.20 | Volynskite | AgBiTe2 |
| 2.JA.20 | Bohdanowiczite | AgBiSe2 |
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 Padĕraite
mindat.org URL:
https://www.mindat.org/min-3059.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
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References for Padĕraite
Reference List:
Ciobanu, C. L., Pring, A., Cook, N. J. (2004) Micron- to nano-scale intergrowths among members of the cuprobismutite series and paděraite: HRTEM and microanalytical evidence. Mineralogical Magazine, 68 (2) 279-300 doi:10.1180/0026461046820187
Topa, D., Makovicky, E. (2006) The crystal structure of paderaite, Cu7(X0.33Pb1.33Bi11.33)Σ13S22, with X = Cu or Ag: new data and interpretation. The Canadian Mineralogist, 44 (2) 481-495 doi:10.2113/gscanmin.44.2.481
Locock, A. J., Ercit, T. S., Kjellman, J., Piilonen, P. C. (2006) New mineral names. American Mineralogist, 91 (11) 1945-1954 doi:10.2138/am.2006.477
IZUMINO, Yuya, NAKASHIMA, Kazuo, NAGASHIMA, Mariko (2014) Cuprobismutite group minerals (cuprobismutite, hodrušhite, kupčíkite and padĕraite), other Bi–sulfosalts and Bi–tellurides from the Obari mine, Yamagata Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 109 (4) 177-190 doi:10.2465/jmps.140129
Localities for Padĕraite
Showing 18 localities.
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.
China | |
| Li et al. (2026) |
| Dequan Zhang et al. (1991) |
| Xu et al. (2024) |
| Zhou et al. (2018) |
Iran | |
| Mousavi Motlagh et al. (2024) |
Japan | |
| IZUMINO et al. (2014) |
North Macedonia | |
| Petrunov et al. (2001) |
Romania (TL) | |
| Neues Jahrb.Min. (1985) +1 other reference |
| Shimizu et al. (1998) | |
| Shimizu et al. (1998) | |
| Cook et al. (2002) |
| minerals-of-the-carpathians.eu (2008) | |
| Ciobanu +3 other references | |
| Cook et al. (2002) |
Slovakia | |
| Kodě +1 other reference |
| Jeleň et al. (2012) | |
South Africa | |
| Topa et al. (2006) |
USA | |
| Microprobe on polished section |
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Black Mountain, Aggeneys, Khâi-Ma Local Municipality, Namakwa District Municipality, Northern Cape, South Africa