Argentotetrahedrite-(Cd)
A valid IMA mineral species
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Formula:
Ag6(Cu4Cd2)Sb4S12S
Colour:
Steel grey tarnished to black
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
5.580 (Calculated)
Crystal System:
Isometric
Member of:
Name:
For the relationship to other members of the tetrahedrite group.
Unique combination of elements (status: October 2022); however, compare 'Cd-Freibergite'.
The Ag6-analogue of tetraedrite-(Cd).
The Ag6-analogue of tetraedrite-(Cd).
Unique Identifiers
Mindat ID:
470390
Long-form identifier:
mindat:1:1:470390:3
GUID
(UUID V4):
(UUID V4):
2cd7733a-4d61-4c33-a373-105655dcd317
IMA Classification of Argentotetrahedrite-(Cd)
Classification of Argentotetrahedrite-(Cd)
2.GB.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
B : Neso-sulfarsenites, etc. with additional S
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
B : Neso-sulfarsenites, etc. with additional S
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 |
---|---|---|
Attr-Cd | 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 Argentotetrahedrite-(Cd)
Metallic
Transparency:
Opaque
Colour:
Steel grey tarnished to black
Streak:
Black
Hardness:
3½ - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Fracture:
Conchoidal
Density:
5.580 g/cm3 (Calculated)
Optical Data of Argentotetrahedrite-(Cd)
Reflectivity:
Wavelength | R |
---|---|
470nm | 30.4% |
546nm | 30.3% |
589nm | 30.3% |
650nm | 28.7% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 30.4%.
Colour in reflected light:
Grey with a creamy tint, rapidly (tens of minutes) tarnished to orange-brown.
Internal Reflections:
None.
Chemistry of Argentotetrahedrite-(Cd)
Mindat Formula:
Ag6(Cu4Cd2)Sb4S12S
Crystallography of Argentotetrahedrite-(Cd)
Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
I4 3m
Cell Parameters:
a = 10.65(2) Å
Unit Cell V:
1,207.95 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.074 Å | (100) |
2.846 Å | (6) |
2.663 Å | (26) |
2.510 Å | (6) |
1.944 Å | (6) |
1.883 Å | (48) |
1.728 Å | (5) |
1.606 Å | (30) |
Type Occurrence of Argentotetrahedrite-(Cd)
General Appearance of Type Material:
Anhedral grains up to 30 μm.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Department of Mineralogy and Petrology, National Museum in Prague, Cirkusová 1740, 19300 Praha 9, Czech Republic, catalogue number P1P 8/2022.
Geological Setting of Type Material:
Au-Ag epithermal deposit.
Associated Minerals at Type Locality:
Synonyms of Argentotetrahedrite-(Cd)
Relationship of Argentotetrahedrite-(Cd) to other Species
Member of:
Other Members of this group:
Argentotetrahedrite-(Fe) | Ag6(Cu4Fe2)Sb4S12S | Iso. 4 3m : I4 3m |
Argentotetrahedrite-(Hg) | Ag6(Cu4Hg2)Sb4S12S | Iso. 4 3m : I4 3m |
Argentotetrahedrite-(Zn) | Ag6(Cu4Zn2)Sb4S12S | Iso. 4 3m : I4 3m |
Kenoargentotetrahedrite-(Fe) | [Ag6]4+(Cu4Fe2+2)Sb4S12◻ | Iso. 4 3m : I4 3m |
Kenoargentotetrahedrite-(Zn) | [Ag6]4+(Cu4Zn2)Sb4S12◻ | Iso. 4 3m : I4 3m |
Related Minerals - Strunz-mindat Grouping
2.GB. | Polybasite-Tac | |
2.GB. | Argentotetrahedrite-(Hg) | Ag6(Cu4Hg2)Sb4S12S |
2.GB. | Hakite-(Zn) | Cu6(Cu4Zn2)Sb4Se12Se |
2.GB. | Hakite-(Cd) | Cu6(Cu4Cd2)Sb4Se12Se |
2.GB. | Argentotetrahedrite-(Zn) | Ag6(Cu4Zn2)Sb4S12S |
2.GB. | Pošepnýite | (Cu+3◻3)(Hg2+4Cu+2)Sb4Se12(Se0.5◻0.5) |
2.GB. | Argentopearceite | Ag16As2S11 |
2.GB. | Zvěstovite-(Zn) | Ag6(Ag4Zn2)As4S12S |
2.GB. | Kenoargentotennantite-(Fe) | [Ag6]4+(Cu4Fe2)As4S12◻ |
2.GB. | Tennantite-(Hg) | Cu6(Cu4Hg2)As4S12S |
2.GB. | Kenoargentotetrahedrite-(Zn) | [Ag6]4+(Cu4Zn2)Sb4S12◻ |
2.GB. | Tennantite-(Cu) | Cu6(Cu4Cu2)As4S12S |
2.GB. | Stibiogoldfieldite | (Cu4Cu2)(Cu4Cu+2)(Sb2Te2)S12S |
2.GB. | Tennantite-(Ni) | Cu6(Cu4Ni2)As4S12S |
2.GB. | Tetrahedrite-(Ni) | Cu6(Cu4Ni2)Sb4S12S |
2.GB. | Stibioústalečite | (Cu4Cu2)(Cu4Cu+2)(Sb2Te2)Se12Se |
2.GB. | Arsenogoldfieldite | (Cu4Cu2)(Cu4Cu+2)(As2Te2)S12S |
2.GB. | Tennantite-(In) | Cu6(Cu4(In3+Cu+))As4S12S |
2.GB. | Tennantite-(Cd) | Cu6(Cu4Cd2)As4S12S |
2.GB. | Tetrahedrite-(Mn) | Cu6(Cu4Mn2)Sb4S12S |
2.GB. | Argentopolybasite | [Ag6Sb2S7][Ag9AgS4] |
2.GB.X | Kenorozhdestvenskayaite-(Fe) | [Ag6]4+(Ag4Fe2+2)Sb4S12◻ |
2.GB. | Tennantite-(Mn) | Cu6(Cu4Mn2)As4S12S |
2.GB. | Zvěstovite-(Fe) | Ag6(Ag4Fe2+2)As4S12S |
2.GB. | Hakite-(Fe) | Cu6(Cu4Fe2+2)Sb4Se12Se |
2.GB. | Tetrahedrite-(Cu) | Cu6(Cu4Cu2+2)Sb4S12S |
2.GB. | Arsenoústalečite | (Cu4Cu2)(Cu4Cu+2)(As2Te2)Se12Se |
2.GB. | Tetrahedrite-(Cd) | Cu6(Cu4Cd2)Sb4S12S |
2.GB.05 | Argentotennantite-(Zn) | Ag6(Cu4Zn2)As4S12S |
2.GB.05 | Freibergite Subgroup | (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1 |
2.GB.05 | Giraudite-(Zn) | Cu6(Cu4Zn2)As4Se12Se |
2.GB.05 | Goldfieldite | (Cu4◻2)(Cu4Cu+2)Te4S12S |
2.GB.05 | Hakite-(Hg) | Cu6(Cu4Hg2)Sb4Se12Se |
2.GB.05 | Tennantite Subgroup | Cu6(Cu4C2+2)As4S12S |
2.GB.05 | Tetrahedrite Subgroup | Cu6(Cu4C2+2)Sb4S12S |
2.GB.05 | Argentotetrahedrite-(Fe) | Ag6(Cu4Fe2)Sb4S12S |
2.GB.05 | Rozhdestvenskayaite-(Zn) | Ag6(Ag4Zn2)Sb4S12S |
2.GB.05 | UM1992-21-S:AgFeSb | Ag6(Ag4Fe2+2)Sb4S12S |
2.GB.05 | Tennantite-(Zn) | Cu6(Cu4Zn2)As4S12S |
2.GB.05 | Tetrahedrite-(Zn) | Cu6(Cu4Zn2)Sb4S12S |
2.GB.05 | Tennantite-(Fe) | Cu6(Cu4Fe2+2)As4S12S |
2.GB.05 | Tetrahedrite-(Fe) | Cu6(Cu4Fe2+2)Sb4S12S |
2.GB.05 | Kenoargentotetrahedrite-(Fe) | [Ag6]4+(Cu4Fe2+2)Sb4S12◻ |
2.GB.05 | Tetrahedrite-(Hg) | Cu6(Cu4Hg2)Sb4S12S |
2.GB.10 | Selenostephanite | Ag5SbSe4 |
2.GB.10 | Stephanite | Ag5SbS4 |
2.GB.15 | Pearceite | [Ag6As2S7][Ag9CuS4] |
2.GB.15 | Polybasite | [Ag6Sb2S7][Ag9CuS4] |
2.GB.15 | UM2003-14-S:AgBiFeTe | Ag16FeBiTe3S8 |
2.GB.15 | Selenopolybasite | [(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2] |
2.GB.15 | Cupropearceite | [Cu6As2S7][Ag9CuS4] |
2.GB.15 | Cupropolybasite | [Cu6Sb2S7][Ag9CuS4] |
2.GB.15 | UM1979-17-S:BiCuFe | ~Cu18Fe4BiS16 |
2.GB.20 | Galkhaite | (Hg5Cu)CsAs4S12 |
2.GB.20 | Vorontsovite | (Hg5Cu)Σ6TlAs4S12 |
2.GB.20 | Ferrovorontsovite | (Fe5Cu)Σ6TlAs4S12 |
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 Argentotetrahedrite-(Cd)
mindat.org URL:
https://www.mindat.org/min-470390.html
Please feel free to link to this page.
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References for Argentotetrahedrite-(Cd)
Reference List:
Mikuš, Tomáš, Vlasáč, Jozef, Majzlan, Juraj, Sejkora, Jiří, Steciuk, Gwladys, Plášil, Jakub, Rößler, Christiane, Matthes, Christian (2023) Argentotetrahedrite-(Cd), Ag6(Cu4Cd2)Sb4S13, a new member of the tetrahedrite group from Rudno nad Hronom, Slovakia. Mineralogical Magazine, 87 (2) 262-270 doi:10.1180/mgm.2022.138
Localities for Argentotetrahedrite-(Cd)
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.