Zvěstovite Subgroup
A group of related mineral species
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Formula:
(Ag6,[Ag6]4+)(Ag4 C2+2)As4S12S0-1
In the A-site, group end-members either contain six III(Ag+Cu) cations (where Ag>Cu) [known species as of 2024], or alternatively, theoretically may contain a discrete metal-metal-bonded [Ag6]4+ polycation cluster. The latter cluster is accompanied by a charge-balancing vacancy at the S2Z site. It is possible in the future that if species with the [Ag6]4+ polycation cluster are discovered, they could also be assigned to a new rootname subgroup (akin to the current relationship between the tetrahedrite and the freibergite subgroups); if this turns out to be the case, this info section will be appropriately updated.
Additionally, the four M1(Ag+Cu) cations are similarly dominated by Ag. Related to the Rozhdestvenskayaite Subgroup by As>Sb.
C2+ = Fe2+, Zn, Cd, Hg and/or other species.
Additionally, the four M1(Ag+Cu) cations are similarly dominated by Ag. Related to the Rozhdestvenskayaite Subgroup by As>Sb.
C2+ = Fe2+, Zn, Cd, Hg and/or other species.
Member of:
Biagioni et al. (2020) delineate the series of very Ag-rich tetrahedrites, where Ag > 8 apfu, belong to the rozhdestvenskayaite series. End-member compositions are Cu-free. However, with the subsequent discovery of a very Ag-rich tennantite (sensu lato) composition, a new As-dominant series or subgroup name will be required. Precedence indicates that the series/subgroup name will be based on the first described member, Zvěstovite-(Zn).
Unique Identifiers
Mindat ID:
55558
Long-form identifier:
mindat:1:1:55558:8
Chemistry of Zvěstovite Subgroup
Mindat Formula:
(Ag6,[Ag6]4+)(Ag4 C2+2)As4S12S0-1
In the A-site, group end-members either contain six III(Ag+Cu) cations (where Ag>Cu) [known species as of 2024], or alternatively, theoretically may contain a discrete metal-metal-bonded [Ag6]4+ polycation cluster. The latter cluster is accompanied by a charge-balancing vacancy at the S2Z site. It is possible in the future that if species with the [Ag6]4+ polycation cluster are discovered, they could also be assigned to a new rootname subgroup (akin to the current relationship between the tetrahedrite and the freibergite subgroups); if this turns out to be the case, this info section will be appropriately updated.
Additionally, the four M1(Ag+Cu) cations are similarly dominated by Ag. Related to the Rozhdestvenskayaite Subgroup by As>Sb.
C2+ = Fe2+, Zn, Cd, Hg and/or other species.
In the A-site, group end-members either contain six III(Ag+Cu) cations (where Ag>Cu) [known species as of 2024], or alternatively, theoretically may contain a discrete metal-metal-bonded [Ag6]4+ polycation cluster. The latter cluster is accompanied by a charge-balancing vacancy at the S2Z site. It is possible in the future that if species with the [Ag6]4+ polycation cluster are discovered, they could also be assigned to a new rootname subgroup (akin to the current relationship between the tetrahedrite and the freibergite subgroups); if this turns out to be the case, this info section will be appropriately updated.
Additionally, the four M1(Ag+Cu) cations are similarly dominated by Ag. Related to the Rozhdestvenskayaite Subgroup by As>Sb.
C2+ = Fe2+, Zn, Cd, Hg and/or other species.
Relationship of Zvěstovite Subgroup to other Species
Member of:
Other Members of Tetrahedrite Group:
| Annivite Subgroup | Cu6(Cu4 C2+2)Bi4S12S | |
| Arsenofreibergite Subgroup | (Ag6,[Ag6]4+)(Cu4 C2+2)As4S12S0-1 | |
| Freibergite Subgroup | (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1 | Iso. 4 3m : I4 3m |
| Giraudite Subgroup | Cu6(Cu4 C2+2)As4Se12Se | |
| Goldfieldite Subgroup | (Cu4(◻,Cu)2(Cu4Cu+2)((Te,Sb,As)2Te2)S12S | |
| Hakite Subgroup | Cu6(Cu4 C2+2)Sb4Se12Se | |
| Pošepnýite | (Cu+3◻3)(Hg2+4Cu+2)Sb4Se12(Se0.5◻0.5) | Iso. 4 3m : I4 3m |
| Rozhdestvenskayaite Subgroup | (Ag6,[Ag6]4+)(Ag4 C2+2)Sb4S12S0-1 | |
| Tennantite Subgroup | Cu6(Cu4C2+2)As4S12S | Iso. 4 3m : I4 3m |
| Tetrahedrite Subgroup | Cu6(Cu4C2+2)Sb4S12S | Iso. 4 3m : I4 3m |
| Ústalečite Subgroup | (Cu4(◻,Cu)2(Cu4Cu+2)((Te,Sb,As)2Te2)Se12Se |
Zvěstovite Subgroup Members:
| Zvěstovite-(Fe) | Ag6(Ag4Fe2+2)As4S12S | Iso. 4 3m : I4 3m |
| Zvěstovite-(Zn) | Ag6(Ag4Zn2)As4S12S | Iso. |
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 Zvěstovite Subgroup
mindat.org URL:
https://www.mindat.org/min-55558.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
References for Zvěstovite Subgroup
Reference List:
Biagioni, Cristian, George, Luke L., Cook, Nigel J., Makovicky, Emil, Moëlo, Yves, Pasero, Marco, Sejkora, Jiří, Stanley, Chris J., Welch, Mark D., Bosi, Ferdinando (2020) The tetrahedrite group: Nomenclature and classification. American Mineralogist, 105 (1) 109-122 doi:10.2138/am-2020-7128(for the derivation of future tetrahedrite group mineral names)
Localities for Zvěstovite Subgroup
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.
Czech Republic | |
| [Zvěstovite-(Zn)] Sejkora et al. (2021) |
Germany | |
| [Zvěstovite-(Zn)] Koch et al. (2018) |
Russia | |
| [Zvěstovite-(Zn)] |
Slovakia | |
| [Zvěstovite-(Zn)] Vlasáč et al. (2025) |
| [Zvěstovite-(Zn)] Vlasáč J. et al. (2025) +1 other reference |