Hakite-(Cd)
A valid IMA mineral species
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Formula:
Cu6(Cu4Cd2)Sb4Se12Se
Colour:
black
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
6.019 (Calculated)
Crystal System:
Isometric
Member of:
Name:
They are named after their chemical composition in agreement
with the nomenclature of the tetrahedrite group.
with the nomenclature of the tetrahedrite group.
The rarest of four hakite subgroup minerals from Příbram, Czech Republic, which also include Hakite-(Hg), Hakite-(Fe) and Hakite-(Zn). Unique combination of elements.
Unique Identifiers
Mindat ID:
47055
Long-form identifier:
mindat:1:1:47055:1
IMA Classification of Hakite-(Cd)
Approved
IMA Formula:
Cu6(Cu4Cd2)Sb4Se13
Approval year:
2022
Type description reference:
Sejkora, Jiří, Biagioni, Cristian, Škácha, Pavel, Musetti, Silvia, Dolníček, Zdeněk (2024) Three new members of the hakite series, Cu6(Cu4Me2+2)Sb4Se13: hakite-(Cd), hakite-(Fe) and hakite-(Zn) from the Bytíz deposit, uranium and base-metal Příbram ore district, Czech Republic. Mineralogical Magazine, 88 (5). 602-612 doi:10.1180/mgm.2024.48
Classification of Hakite-(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 |
|---|---|---|
| Hak-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 Hakite-(Cd)
Metallic
Transparency:
Opaque
Colour:
black
Hardness:
3½ - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Fracture:
Conchoidal
Density:
6.019 g/cm3 (Calculated)
Optical Data of Hakite-(Cd)
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 470nm | 34.4% |
| 546nm | 33.9% |
| 589nm | 34.1% |
| 650nm | 34.4% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 34.4%.
Colour in reflected light:
pale grey with bluish tints
Internal Reflections:
none
Chemistry of Hakite-(Cd)
Mindat Formula:
Cu6(Cu4Cd2)Sb4Se12Se
Element Weights:
Elements listed:
Crystallography of Hakite-(Cd)
Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
I4 3m
Cell Parameters:
a = 10.8860(6) Å
Unit Cell V:
1,290.05 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.143 Å | (100) |
| 2.909 Å | (12) |
| 2.566 Å | (8) |
| 2.135 Å | (9) |
| 1.988 Å | (13) |
| 1.924 Å | (50) |
| 1.766 Å | (9) |
| 1.641 Å | (20) |
Type Occurrence of Hakite-(Cd)
General Appearance of Type Material:
anhedral grains and veinlets up to 100 μm in size. It is locally replaced by lath-shaped crystals of
cadmoselite, the replacement starting from the centre of aggregates.
cadmoselite, the replacement starting from the centre of aggregates.
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 Prague 9, Czech Republic, catalogue number P1P 30/2022, and the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (PI), Italy, catalogue number 20022
Geological Setting of Type Material:
In the Příbram uranium and base-metal district, there are four main mineralisation stages: (1) siderite-sulfidic; (2) calcite; (3) calcite–uraninite; and (4) calcite-sulfidic. Selenide mineralisation occurs in close association with uraninite of the calcite–uraninite mineralisation, but selenides are always younger than uraninite. New members of the hakite series were identified in calcite-uraninite gangue.
Associated Minerals at Type Locality:
Reference:
Sejkora, Jiří, Biagioni, Cristian, Škácha, Pavel, Musetti, Silvia, Dolníček, Zdeněk (2024) Three new members of the hakite series, Cu6(Cu4Me2+2)Sb4Se13: hakite-(Cd), hakite-(Fe) and hakite-(Zn) from the Bytíz deposit, uranium and base-metal Příbram ore district, Czech Republic. Mineralogical Magazine, 88 (5). 602-612 doi:10.1180/mgm.2024.48
Synonyms of Hakite-(Cd)
Other Language Names for Hakite-(Cd)
Dutch:Hakiet-(Cd)
German:Hakit-(Cd)
Relationship of Hakite-(Cd) to other Species
Member of:
Other Members of Hakite Subgroup:
| Hakite-(Fe) | Cu6(Cu4Fe2+2)Sb4Se12Se | Iso. 4 3m : I4 3m |
| Hakite-(Hg) | Cu6(Cu4Hg2)Sb4Se12Se | Iso. 4 3m : I4 3m |
| Hakite-(Zn) | Cu6(Cu4Zn2)Sb4Se12Se | Iso. 4 3m : I4 3m |
Related Minerals - Strunz-mindat Grouping
| 2.GB. | Polybasite-Tac | [Ag6Sb2S7][Ag9CuS4] |
| 2.GB. | Kenoargentotetrahedrite-(Zn) | [Ag6]4+(Cu4Zn2)Sb4S12◻ |
| 2.GB. | Argentotetrahedrite-(Hg) | Ag6(Cu4Hg2)Sb4S12S |
| 2.GB. | Annivite-(Zn) | Cu6(Cu4Zn2)Bi4S12S |
| 2.GB. | Pošepnýite | (Cu+3◻3)(Hg2+4Cu+2)Sb4Se12(Se0.5◻0.5) |
| 2.GB. | Tennantite-(Cu) | Cu6(Cu4Cu2)As4S12S |
| 2.GB. | Argentopolybasite | [Ag6Sb2S7][Ag9AgS4] |
| 2.GB. | Tennantite-(Mn) | Cu6(Cu4Mn2)As4S12S |
| 2.GB. | Argentotetrahedrite-(Cd) | Ag6(Cu4Cd2)Sb4S12S |
| 2.GB. | Stibioústalečite | (Cu4Cu2)(Cu4Cu+2)(Sb2Te2)Se12Se |
| 2.GB. | Stibiogoldfieldite | (Cu4Cu2)(Cu4Cu+2)(Sb2Te2)S12S |
| 2.GB. | Argentotetrahedrite-(Zn) | Ag6(Cu4Zn2)Sb4S12S |
| 2.GB. | Tetrahedrite-(Cd) | Cu6(Cu4Cd2)Sb4S12S |
| 2.GB. | Arsenogoldfieldite | (Cu4Cu2)(Cu4Cu+2)(As2Te2)S12S |
| 2.GB. | Arsenoústalečite | (Cu4Cu2)(Cu4Cu+2)(As2Te2)Se12Se |
| 2.GB. | Tennantite-(In) | Cu6(Cu4(In3+Cu+))As4S12S |
| 2.GB. | Zvěstovite-(Fe) | Ag6(Ag4Fe2+2)As4S12S |
| 2.GB. | Hakite-(Fe) | Cu6(Cu4Fe2+2)Sb4Se12Se |
| 2.GB. | Tennantite-(Cd) | Cu6(Cu4Cd2)As4S12S |
| 2.GB.X | Kenorozhdestvenskayaite-(Fe) | [Ag6]4+(Ag4Fe2+2)Sb4S12◻ |
| 2.GB. | Tetrahedrite-(Cu) | Cu6(Cu4Cu2+2)Sb4S12S |
| 2.GB. | Hakite-(Zn) | Cu6(Cu4Zn2)Sb4Se12Se |
| 2.GB. | Zvěstovite-(Zn) | Ag6(Ag4Zn2)As4S12S |
| 2.GB. | Kenoargentotennantite-(Fe) | [Ag6]4+(Cu4Fe2)As4S12◻ |
| 2.GB. | Tennantite-(Hg) | Cu6(Cu4Hg2)As4S12S |
| 2.GB. | Tetrahedrite-(Mn) | Cu6(Cu4Mn2)Sb4S12S |
| 2.GB. | Tennantite-(Ni) | Cu6(Cu4Ni2)As4S12S |
| 2.GB. | Tetrahedrite-(Ni) | Cu6(Cu4Ni2)Sb4S12S |
| 2.GB.05 | Hakite-(Hg) | Cu6(Cu4Hg2)Sb4Se12Se |
| 2.GB.05 | Rozhdestvenskayaite-(Zn) | Ag6(Ag4Zn2)Sb4S12S |
| 2.GB.05 | Argentotennantite-(Zn) | Ag6(Cu4Zn2)As4S12S |
| 2.GB.05 | Argentotennantite-(Fe) | Ag6(Cu4Fe2)As4S12S |
| 2.GB.05 | Freibergite Subgroup | (Ag6,[Ag6]4+)(Cu4 C2+2)Sb4S12S0-1 |
| 2.GB.05 | Tennantite Subgroup | Cu6(Cu4C2+2)As4S12S |
| 2.GB.05 | Tennantite-(Zn) | Cu6(Cu4Zn2)As4S12S |
| 2.GB.05 | Tetrahedrite-(Zn) | Cu6(Cu4Zn2)Sb4S12S |
| 2.GB.05 | Tetrahedrite Subgroup | Cu6(Cu4C2+2)Sb4S12S |
| 2.GB.05 | Tennantite-(Fe) | Cu6(Cu4Fe2+2)As4S12S |
| 2.GB.05 | Tetrahedrite-(Fe) | Cu6(Cu4Fe2+2)Sb4S12S |
| 2.GB.05 | Tetrahedrite-(Hg) | Cu6(Cu4Hg2)Sb4S12S |
| 2.GB.05 | Kenoargentotetrahedrite-(Fe) | [Ag6]4+(Cu4Fe2+2)Sb4S12◻ |
| 2.GB.05 | Giraudite-(Zn) | Cu6(Cu4Zn2)As4Se12Se |
| 2.GB.05 | Argentotetrahedrite-(Fe) | Ag6(Cu4Fe2)Sb4S12S |
| 2.GB.05 | Goldfieldite | (Cu4◻2)(Cu4Cu+2)Te4S12S |
| 2.GB.05 | UM1992-21-S:AgFeSb | Ag6(Ag4Fe2+2)Sb4S12S |
| 2.GB.10 | Selenostephanite | Ag5SbSe4 |
| 2.GB.10 | Stephanite | Ag5SbS4 |
| 2.GB.15 | UM2003-14-S:AgBiFeTe | Ag16FeBiTe3S8 |
| 2.GB.15 | UM1979-17-S:BiCuFe | ~Cu18Fe4BiS16 |
| 2.GB.15 | Pearceite | [Ag6As2S7][Ag9CuS4] |
| 2.GB.15 | Argentopearceite | Ag16As2S11 |
| 2.GB.15 | Cupropolybasite | [Cu6Sb2S7][Ag9CuS4] |
| 2.GB.15 | Fengruiite | [Ag6Sb2S7][Ag9CuS2Te2] |
| 2.GB.15 | Auropearceite | [Ag9AuS4][Ag6As2S7] |
| 2.GB.15 | Selenopolybasite | [(Ag,Cu)6(Sb,As)2(S,Se)7][Ag9Cu(S,Se)2Se2] |
| 2.GB.15 | Polybasite | [Ag6Sb2S7][Ag9CuS4] |
| 2.GB.15 | Auropolybasite | [Ag9AuS4][Ag6Sb2S7] |
| 2.GB.15 | Cupropearceite | [Cu6As2S7][Ag9CuS4] |
| 2.GB.20 | Vorontsovite | (Hg5Cu)Σ6TlAs4S12 |
| 2.GB.20 | Ferrovorontsovite | (Fe5Cu)Σ6TlAs4S12 |
| 2.GB.20 | Galkhaite | (Hg5Cu)CsAs4S12 |
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 Hakite-(Cd)
mindat.org URL:
https://www.mindat.org/min-47055.html
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External Links:
References for Hakite-(Cd)
Reference List:
Škácha, P., Sejkora, J., Palatinus, L., Makovicky, E., Plášil, J., Macek, I., Goliáš, V. (2016) Hakite from Příbram, Czech Republic: compositional variability, crystal structure and the role in Se mineralization. Mineralogical Magazine, 80 (6) 1115-1128 doi:10.1180/minmag.2016.080.038
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 70. European Journal of Mineralogy, 34 (6) 591-601 doi:10.5194/ejm-34-591-2022
Sejkora, Jiří, Biagioni, Cristian, Škácha, Pavel, Musetti, Silvia, Dolníček, Zdeněk (2024) Three new members of the hakite series, Cu6(Cu4Me2+2)Sb4Se13: hakite-(Cd), hakite-(Fe) and hakite-(Zn) from the Bytíz deposit, uranium and base-metal Příbram ore district, Czech Republic. Mineralogical Magazine, 88 (5). 602-612 doi:10.1180/mgm.2024.48
Localities for Hakite-(Cd)
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 | |
| Škácha et al. (2016) +1 other reference |
| Miyawaki et al. (2022) +1 other reference |
| Sejkora et al. (2014) |