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Madocite
A valid IMA mineral species
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About Madocite
Madoc, Ontario, Canada
Formula:
Pb19(Sb,As)16S43
Colour:
Grey-black
Lustre:
Metallic
Hardness:
3
Crystal System:
Orthorhombic
Name:
Named by by John L. Jambor in 1965 for the town of the type locality: Madoc, Ontario, Canada.
This page provides mineralogical data about Madocite.
Unique Identifiers
Mindat ID:
2517
Long-form identifier:
mindat:1:1:2517:7
IMA Classification of Madocite
Approved
IMA Formula:
Pb2+19(Sb3+,As3+)16S2-43
Approval year:
1966
First published:
1967
Classification of Madocite
2.LB.30
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
B : With essential Pb
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
B : With essential Pb
3.5.7.1
3 : SULFOSALTS
5 : 2.5 < Ãļ < 3
3 : SULFOSALTS
5 : 2.5 < Ãļ < 3
5.6.14
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
6 : Sulpharsenites etc. of Pb alone
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
6 : Sulpharsenites etc. of Pb alone
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Mdc | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Madocite
Metallic
Transparency:
Opaque
Colour:
Grey-black
Streak:
Grey-brack
Hardness:
3 on Mohs scale
Cleavage:
Perfect
{010}
{010}
Fracture:
Conchoidal
Chemistry of Madocite
Mindat Formula:
Pb19(Sb,As)16S43
Element Weights:
Elements listed:
Crystallography of Madocite
Crystal System:
Orthorhombic
Cell Parameters:
a = 27.2(2) Å, b = 34.1(2) Å, c = 4.06(5) Å
Ratio:
a:b:c = 0.798 : 1 : 0.119
Unit Cell V:
3,765.73 Ã
Âģ (Calculated from Unit Cell)
Z:
4
Comment:
Space group Pbam or Pba2. Strong pseudoperiod with c' = 0.5c.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.87 Ã | (50) |
| 3.67 Ã | (70) |
| 3.396 Ã | (100) |
| 3.355 Ã | (90) |
| 3.110 Ã | (40) |
| 2.925 Ã | (60) |
| 2.720 Ã | (80) |
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 Madocite
Synonyms of Madocite
Other Language Names for Madocite
Related Minerals - Strunz-mindat Grouping
| 2.LB. | Ciriottiite | Cu(Cu,Ag)3Pb19(Sb,As)22(As2)S56 |
| 2.LB. | Hayyanite | Cu5Ag11Pb76Sb71As17(As2+)8S224 |
| 2.LB. | Wenqingite | Pb5(AsS3)2(Ge2S6) |
| 2.LB.05 | Miharaite | Cu4FePbBiS6 |
| 2.LB.30 | Launayite | Cu2Pb20(Sb,As)26S60 |
| 2.LB.30 | Ardaite | Pb19Sb13S35Cl7 |
| 2.LB.30 | Sorbyite | CuPb9(Sb,As)11S26 |
| 2.LB.30 | Playfairite | Pb16(Sb,As)19S44Cl |
| 2.LB.30 | Sterryite | Cu(Ag,Cu)3Pb19(Sb,As)22(As2)S56 |
| 2.LB.35 | Larosite | (Cu,Ag)21PbBiS13 |
| 2.LB.40 | Mazzettiite | Ag3HgPbSbTe5 |
| 2.LB.40 | Petrovicite | Cu3HgPbBiSe5 |
| 2.LB.45 | Crerarite | Pt2-x(Bi,Pb)11(S,Se)11 |
| 2.LB.50 | Quijarroite | Cu6HgPb2Bi4Se12 |
| 2.LB.55 | Znamenskyite | Pb4In2Bi4S13 |
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 Madocite
mindat.org URL:
https://www.mindat.org/min-2517.html
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References for Madocite
Reference List:
Jambor, John Leslie (1967) New lead sulfantimonides from Madoc, Ontario. Part 1. The Canadian Mineralogist, 9 (1) 7-24
Jambor, John Leslie (1968) New lead sulfantimonides from Madoc, Ontario. Part 3--Syntheses, paragenesis, origin. The Canadian Mineralogist, 9 (4). 505-521
Localities for Madocite
Showing 8 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Bolivia | |
| Walenta et al. (1980) |
Canada (TL) | |
| Jambor (1967) +3 other references |
France | |
| Anthony et al. (1990) |
Japan | |
| ISHIYAMA et al. (1990) |
Romania | |
| minerals-of-the-carpathians.eu (2008) |
Russia | |
| Eremin et al. (2023) |
Sweden | |
| |
USA | |
| Jambor (1967) |
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Taylor Pit, Madoc, Centre Hastings Municipality, Hastings County, Ontario, Canada