Madocite
A valid IMA mineral species
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Formula:
Pb19(Sb,As)16S43
Colour:
Grey-brack
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
GUID
(UUID V4):
(UUID V4):
496b6e99-abd7-4f43-a260-ae2a93df67ec
IMA Classification of Madocite
Approved
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 < ø < 3
3 : SULFOSALTS
5 : 2.5 < ø < 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 IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Mdc | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Madocite
Metallic
Transparency:
Opaque
Colour:
Grey-brack
Streak:
Grey-brack
Hardness:
3 on Mohs scale
Cleavage:
Perfect
{010}
{010}
Fracture:
Conchoidal
Chemistry of Madocite
Mindat Formula:
Pb19(Sb,As)16S43
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 ų (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 Å | (50) |
3.67 Å | (70) |
3.396 Å | (100) |
3.355 Å | (90) |
3.110 Å | (40) |
2.925 Å | (60) |
2.720 Å | (80) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Madocite
Reference:
Jambor, J.L. (1967) New lead sulfantimonides from Madoc, Ontario. Part 1. Canadian Mineralogist: 9: 7-24.
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.05 | Miharaite | Cu4FePbBiS6 |
2.LB.30 | Ardaite | Pb19Sb13S35Cl7 |
2.LB.30 | Launayite | CuPb10(Sb,As)12S20 |
2.LB.30 | Playfairite | Pb16(Sb,As)19S44Cl |
2.LB.30 | Sorbyite | CuPb9(Sb,As)11S26 |
2.LB.30 | Sterryite | Cu(Ag,Cu)3Pb19(Sb,As)22(As-As)S56 |
2.LB.35 | Larosite | (Cu,Ag)21PbBiS13 |
2.LB.40 | Petrovicite | Cu3HgPbBiSe5 |
2.LB.40 | Mazzettiite | Ag3HgPbSbTe5 |
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
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).
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.
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 (1967a) |