Log In
Coiraite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Coiraite
Beatriz L. Coira
Formula:
(Pb,Sn)12.5Sn5FeAs3S28
Colour:
grey to dark-grey
Lustre:
Metallic, Dull
Hardness:
2
Specific Gravity:
5.92 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named after Beatriz Lydia Coira (born 1941), Professor of Petrology at the University of Jujuy, NW Argentina, for her outstanding research on volcanism, regional geology and its relation to ore-deposit formation in Argentina.
Unique Identifiers
Mindat ID:
27610
Long-form identifier:
mindat:1:1:27610:4
Similar Names
| Curite | A valid IMA mineral species - grandfathered | Pb3(H2O)2[(UO2)4O4(OH)3]2 |
| Goureite | A synonym of Narsarsukite | |
| Koreite | A synonym of 'Agalmatolite' | |
| Korite | A synonym of 'Ammolite' | |
| Moiraite | A valid IMA mineral species - pending publication | Pb12Sb8As8S36 |
IMA Classification of Coiraite
Classification of Coiraite
2.HF.25b
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
F : With SnS and PbS archetype structure units
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
F : With SnS and PbS archetype structure units
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 for Standard |
|---|---|---|
| Coi | 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 Coiraite
Metallic, Dull
Transparency:
Opaque
Colour:
grey to dark-grey
Streak:
Dark-grey to almost black streak
Hardness:
2 on Mohs scale
Hardness:
VHN10=74 kg/mm2 - Vickers
Tenacity:
Flexible
Cleavage:
Perfect
parallel to a basal plane - synthetic
parallel to a basal plane - synthetic
Density:
5.92 g/cm3 (Calculated)
Optical Data of Coiraite
Anisotropism:
moderately anisotropic in oil and the rotation tints are brown to bluish-grey
Bireflectance:
very weak in air and oil
Colour in reflected light:
bluish-grey
Pleochroism:
Not Visible
Chemistry of Coiraite
Mindat Formula:
(Pb,Sn)12.5Sn5FeAs3S28
Element Weights:
Crystallography of Coiraite
Crystal System:
Monoclinic
Cell Parameters:
a = 5.84(1) Å, b = 5.86(1) Å, c = 17.32(1) Å
β = 94.14(1)°
β = 94.14(1)°
Ratio:
a:b:c = 0.997 : 1 : 2.956
Unit Cell V:
591.19 ų (Calculated from Unit Cell)
Z:
4
Comment:
has two monoclinic sub-cells, Q (pseudotetragonal) and H (pseudohexagonal). Above data is for Q cell.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.27 Å | (61) |
| 3.426 Å | (72) |
| 3.345 Å | (87) |
| 3.122 Å | (78) |
| 3.009 Å | (71) |
| 2.966 Å | (94) |
| 2.883 Å | (100) |
| 2.065 Å | (51) |
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 Coiraite
General Appearance of Type Material:
very dense, earthy and fine-grained aggregates with a distinct colloform texture
Place of Conservation of Type Material:
Department of Materials Engineering and Physics, University of Salzburg, Austria, registered under catalogue numbers 14943-14946, in the reference collections of the Natural History Museum, London, UK (BM 2008, 47), the Landesmuseum Joanneum, Graz, Styria
Geological Setting of Type Material:
Polymetallic hydrotermal veins in Ordovician sediments of the Acoyte Formation
Associated Minerals at Type Locality:
Synonyms of Coiraite
Other Language Names for Coiraite
Dutch:Coiraiet
German:Coirait
As-Franckeit
As-Franckeit
Relationship of Coiraite to other Species
Member of:
Other Members of Franckeite Group:
| Franckeite | Fe2+(Pb,Sn2+)6Sn4+2Sb2S14 | Tric. 1 : P1 |
| Ramosite | Pb25.7Sn8.3Mn3.4Sb6.4S56.2 | Mon. |
Common Associates
Associations Based on Photo Data:
| 34 photos of Coiraite associated with Galena | PbS |
| 33 photos of Coiraite associated with Sphalerite | ZnS |
| 27 photos of Coiraite associated with Pyrite | FeS2 |
| 13 photos of Coiraite associated with Goethite | Fe3+O(OH) |
| 12 photos of Coiraite associated with Suredaite | PbSnS3 |
| 10 photos of Coiraite associated with Wurtzite | (Zn,Fe)S |
| 7 photos of Coiraite associated with Marcasite | FeS2 |
| 3 photos of Coiraite associated with 'Schalenblende' |
Related Minerals - Strunz-mindat Grouping
| 2.HF. | Ramosite | Pb25.7Sn8.3Mn3.4Sb6.4S56.2 |
| 2.HF.20 | Vrbaite | Hg3Tl4As8Sb2S20 |
| 2.HF.25b | Franckeite | Fe2+(Pb,Sn2+)6Sn4+2Sb2S14 |
| 2.HF.25a | Merelaniite | Mo4Pb4VSbS15 |
| 2.HF.25a | Abramovite | Pb2SnInBiS7 |
| 2.HF.25a | Lévyclaudite | Pb8Sn7Cu3(Bi,Sb)3S28 |
| 2.HF.25a | Cylindrite | Pb3Sn4FeSb2S14 |
| 2.HF.25b | 'Potosíite' | Pb6Sn3FeSb3S16 |
| 2.HF.25b v | 'Plumbostannite' | Pb2Fe2Sn2Sb2S11 |
| 2.HF.30 | Lengenbachite | Ag4Cu2Pb18As12S39 |
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 Coiraite
mindat.org URL:
https://www.mindat.org/min-27610.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Coiraite
Reference List:
Paar, W. H., Moëlo, Y., Mozgova, N. N., Organova, N. I., Stanley, C. J., Roberts, A. C., Culetto, F. J., Effenberger, H. S., Topa, D., Putz, H., Sureda, R. J., de Brodtkorb, M. K. (2008) Coiraite, (Pb,Sn2+)12.5As3Fe2+Sn4+5S28: a franckeite-type new mineral species from Jujuy Province, NW Argentina. Mineralogical Magazine, 72 (5) 1083-1101 doi:10.1180/minmag.2008.072.5.1083
Localities for Coiraite
Showing 5 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.
Argentina (TL) | |
| Silver Standard Resources Inc |
| Paar et al. (2008) |
| Paar (2013) | |
Australia | |
| R Bottrill |
Bolivia | |
| Torró et al. (2019) |
Quick NavTopAbout CoiraiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Oploca Vein System, San Miguel Open pit, Pirquitas Mine, Mina Pirquitas, Rinconada Department, Jujuy Province, Argentina