Arsenofreibergite Subgroup
A group of related mineral species
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About Arsenofreibergite Subgroup
Formula:
(Ag6,[Ag6]4+)(Cu4 C2+2)As4S12S0-1
In the A-site, group end-members either contain six III(Ag+Cu) cations (where Ag>Cu), or alternatively, contain a discrete metal-metal-bonded [Ag6]4+ polycation cluster. The latter cluster is accompanied by a charge-balancing vacancy at the S2Z site.
C2+ = Fe2+, Zn, Cd, Hg and/or other species
Z = S, Se, ◻
C2+ = Fe2+, Zn, Cd, Hg and/or other species
Z = S, Se, ◻
Member of:
Biagioni et al. (2020) assign the name "arsenofreibergite series" to delineate the series of Ag-bearing tennantites where 3 apfu < Ag < 8 apfu; tennantite-group minerals with Ag < 3 apfu belong to the tennantite series, and tennantite-group minerals with Ag > 8 apfu are represented by zvěstovite-(Zn).
For the corresponding Sb-dominant members see the Freibergite Subgroup.
For the corresponding Sb-dominant members see the Freibergite Subgroup.
Unique Identifiers
Mindat ID:
54915
Long-form identifier:
mindat:1:1:54915:2
GUID
(UUID V4):
(UUID V4):
6c3c0536-61a3-4b09-b50c-f23bd31da565
IMA Classification of Arsenofreibergite Subgroup
IMA status notes:
IMA Approved Group Name
Chemistry of Arsenofreibergite Subgroup
Mindat Formula:
(Ag6,[Ag6]4+)(Cu4 C2+2)As4S12S0-1
In the A-site, group end-members either contain six III(Ag+Cu) cations (where Ag>Cu), or alternatively, contain a discrete metal-metal-bonded [Ag6]4+ polycation cluster. The latter cluster is accompanied by a charge-balancing vacancy at the S2Z site.
C2+ = Fe2+, Zn, Cd, Hg and/or other species
Z = S, Se, ◻
In the A-site, group end-members either contain six III(Ag+Cu) cations (where Ag>Cu), or alternatively, contain a discrete metal-metal-bonded [Ag6]4+ polycation cluster. The latter cluster is accompanied by a charge-balancing vacancy at the S2Z site.
C2+ = Fe2+, Zn, Cd, Hg and/or other species
Z = S, Se, ◻
Relationship of Arsenofreibergite Subgroup to other Species
Member of:
Other Members of this group:
| 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 |
| Tennantite-(In) | Cu6(Cu4(In3+Cu+))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 | (Ag6,[Ag6]4+)(Ag4 C2+2)As4S12S0-1 |
Group Members:
| Argentotennantite-(Zn) | Ag6(Cu4Zn2)As4S12S | Iso. 4 3m : I4 3m |
| Kenoargentotennantite-(Fe) | [Ag6]4+(Cu4Fe2)As4S12◻ | Iso. |
| Unnamed (Fe-analogue of Argentotennantite-(Zn)) | Ag6(Cu4Fe2)As4S12S |
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 Arsenofreibergite Subgroup
mindat.org URL:
https://www.mindat.org/min-54915.html
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References for Arsenofreibergite Subgroup
Reference List:
Los Almadenes Mining Group, Alcaracejos, Córdoba, Andalusia, Spain