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Aktashite

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Formula:
Cu
 
6
Hg
 
3
As
 
4
S
 
12
System:TrigonalColour:Gray-black
Lustre:MetallicHardness:
Name:Named after its discovery locality in Russia.
Published without approbation, but recognize as valid species by the IMA CNMNC Sulfosalts Subcommittee (2008).
Isostructural with:Gruzdevite, Nowackiite
This page provides mineralogical data about Aktashite.

Classification of Aktashite

IMA status:Redefined Approved 2008
Strunz 8th edition ID:2/C.12-30
Nickel-Strunz 10th (pending) edition ID:2.GA.30

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
G : Sulfarsenites, sulfantimonites, sulfbismuthites
A : Neso-sulfarsenites, etc. without additional S
Dana 8th edition ID:3.4.13.2

3 : SULFOSALTS
4 : ø = 3
Hey's CIM Ref.:5.4.3

5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
4 : Sulpharsenites etc. of Zn and Hg
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Type Occurrence of Aktashite

Type Locality:Aktashskoye Sb-Hg deposit, Altai Republic (Gorno-Altayskaya Autonomous Oblast'), Western-Siberian Region, Russia
Place of Conservation of Type Material:Central Siberian Geological Museum, Novosibirsk, Russia, III-14/1; National School of Mines, Paris, France.
Year of Discovery:1968
Geological Setting of type material:Uncommon, of hydrothermal origin in complex polymetallic As–Hg-bearing deposits.
Associated Minerals at type locality:
TennantiteStibniteSphaleriteRealgarQuartz
PyriteOrpimentMercurian TetrahedriteLuzoniteEnargite
DickiteCinnabarChalcostibiteChalcopyriteCalcite

Occurrences of Aktashite

Geological Setting:Hydrothermal veins

Physical Properties of Aktashite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Gray-black
Comment:white in reflected light
Streak:black
Hardness (Mohs):
Hardness (Vickers):VHN50=300 - 346 kg/mm2
Tenacity:Brittle
Cleavage:None Observed
Fracture:Irregular/Uneven, Conchoidal
Density (measured):5.5 g/cm3
Density (calculated):5.72 g/cm3

Crystallography of Aktashite

Crystal System:Trigonal
Class (H-M):3 - Pyramidal
Space Group:R3
Cell Parameters:a = 13.730(3) Å, c = 9.329(1) Å
Ratio:a:c = 1 : 0.679
Unit Cell Volume:V 1,523.02 ų (Calculated from Unit Cell)
Z:3
Morphology:Rarely in crystals resembling trigonal pyramids, to 0.2 mm, which may be zoned with gruzdevite; as xenomorphic grains and granular aggregates.
X-Ray Powder Diffraction:
d-spacingIntensity
4.04 (20)
3.10 (100)
2.69 (70)
1.903 (100)
1.621 (100)
1.554 (20)
1.345 (30)
1.236 (40)
1.204 (20)
Comments:Gal-Khaya, Yakutia, Russia (ICDD 25-298).

Optical Data of Aktashite

Type:Anisotropic
Anisotropism:weak in shades of blue
Colour in reflected light:White

Chemical Properties of Aktashite

Formula:
Cu
 
6
Hg
 
3
As
 
4
S
 
12
Simplified for copy/paste:Cu6Hg3As4S12
Essential elements:As, Cu, Hg, S
All elements listed in formula:As, Cu, Hg, S
Common Impurities:Zn,Sb

Relationship of Aktashite to other Species

Series:Forms a series with Gruzdevite (see here)
Related Minerals - Nickel-Strunz Grouping):

- +
2.GA.05Proustite
Ag
 
3
AsS
 
3
2.GA.05Pyrargyrite
Ag
 
3
SbS
 
3
2.GA.10Pyrostilpnite
Ag
 
3
SbS
 
3
2.GA.10Xanthoconite
Ag
 
3
AsS
 
3
2.GA.15Samsonite
Ag
 
4
MnSb
 
2
S
 
6
2.GA.20Skinnerite
Cu
 
3
SbS
 
3
2.GA.20Wittichenite
Cu
 
3
BiS
 
3
2.GA.25Lapieite
NiCuSbS
 
3
2.GA.25Mückeite
NiCu(Bi,Sb)S
 
3
2.GA.25Malyshevite
PdCuBiS
 
3
2.GA.25Lisiguangite
PtCuBiS
 
3
2.GA.30Gruzdevite
Cu
 
6
Hg
 
3
Sb
 
4
S
 
12
2.GA.30Nowackiite
Cu
 
6
Zn
 
3
As
 
4
S
 
12
2.GA.35Laffittite
AgHgAsS
 
3
2.GA.40Routhierite
Tl(Cu,Ag)(Hg,Zn)
 
2
(As,Sb)
 
2
S
 
6
2.GA.40Stalderite
Tl(Cu,Ag)(Zn,Fe,Hg)
 
2
(As,Sb)
 
2
S
 
6
2.GA.45Erniggliite
Tl
 
2
SnAs
 
2
S
 
6
2.GA.50Bournonite
PbCuSbS
 
3
2.GA.50Seligmannite
PbCuAsS
 
3
2.GA.50Součekite
PbCuBi(S,Se)
 
3
Related Minerals - Hey's Index Grouping:

- +
5.4.1Nowackiite
Cu
 
6
Zn
 
3
As
 
4
S
 
12
5.4.2Florensovite
(Cu,Zn)Cr
 
1.5
Sb
 
0.5
S
 
4
5.4.4Laffittite
AgHgAsS
 
3
5.4.5Galkhaite
(Cs,Tl)(Hg,Cu,Zn)
 
6
(As,Sb)
 
4
S
 
12
5.4.6Livingstonite
HgSb
 
4
S
 
6
(S
 
2
)
5.4.7Gruzdevite
Cu
 
6
Hg
 
3
Sb
 
4
S
 
12
5.4.8Tvalchrelidzeite
Hg
 
3
SbAsS
 
3
5.4.9Hakite
Cu
 
6
[Cu
 
4
Hg
 
2
]Sb
 
4
Se
 
13

Other Names for Aktashite

Other Languages:
German:Aktashit
Russian:Акташит
Simplified Chinese:硫砷汞铜矿
Spanish:Aktashita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Aktashite

Reference List:

- +
American Mineralogist: 58: 562.

Voprosy metallogenii rtuti (Problems of mercury metallogeny): 111-129.

Doklady Akademii Nauk SSSR: 206(3): 694-697.

Doklady Akademii Nauk SSSR: 251(1): 96-98.

Nowacki, W. (1982): Isotypy in aktashite Cu6Hg3As4S12 and nowackiite Cu6Zn3As4S12. Soviet Physics - Crystallography 27, 26-27.

V. I. Vasil’ev, N. V. Pervukhina, S. V. Borisov, S. A. Magarill, D. Yu. Naumov and N. V. Kurat’eva (2010): Aktashite Cu6Hg3As4S12 from the Aktash deposit, Altai, Russia: Refinement and crystal chemical analysis of the structure. Geology of Ore Deposits 52, 656-661.

Internet Links for Aktashite

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  • External Links:
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  • Localities for Aktashite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Canada
     
    • Ontario
      • Thunder Bay District
        • Bomby Township
    ontariominerals.com; Mineralogical Magazine 1988 52 : 691-697
    Ann P.Sabina (1991), Rocks and Minerals for the Collector, Sudbury to Winnipeg. GSC Misc. Report 49. p.86
    Econ Geol (1997) 92:569-577
    China
     
    • Sichuan Province
      • Ngawa Autonomous Prefecture (Aba Autonomous Prefecture)
        • Jiuzhaigou Co. (Nanping Co.)
    http://www.idm.gov.vn/Nguon_luc/Xuat_ban/2004/B23/b42.htm
    France
     
    • Provence-Alpes-Côte d'Azur
      • Hautes-Alpes
        • La Chapelle-en-Valgaudemar (La Chapelle-en-Valgaudémar)
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    Georgia
     
    • Racha-Lochkhumi-Kvemo Svaneti Region
      • Mestia-Racha District
    Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
    Iran
     
    • West Azarbaijan Province (West Azerbaijan Province)
      • Takab (Takan Tepe)
    Asadi, H.H., Voncken, J.H.L, Kühnel, R.A., and Hale, M. (2000): Mineralium Deposita 35, 656-671.
    Italy
     
    • Tuscany
      • Lucca Province
        • Apuan Alps
          • Stazzema
            • Sant'Anna di Stazzema
    Biagioni, C., Bonaccorsi, E., Moëlo, Y., Orlandi, P. (2014): Mercury-arsenic sulfosalts from Apuan Alps (Tuscany, Italy). II. Aktashite, Cu6Hg3As4S12, and laffittite, AgHgAsS3, from the Monte Arsiccio mine: occurrence and crystal structure. Periodico di Mineralogia, 83, 1-18.
    Kyrgyzstan
     
    • Osh Oblast
      • Alai Range (Alay Range)
    [Lapis 1993:11 p11-24]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
        • Fergana Valley
    [Lapis 11:11-24]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mexico
     
    • Sonora
      • Mun. de Moctezuma
    Lapis 2001(1), 11-40
    Russia
     
    • Eastern-Siberian Region
      • Sakha Republic (Saha Republic; Yakutia)
    Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 1, 1990
    • Urals Region
      • Middle Urals
        • Sverdlovskaya Oblast'
          • Krasnoturjinsk (Bogolovsk; Krasnotur'insk; Krasnoturyinsk)
            • Turya river
              • Turjinsk
    Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    • Western-Siberian Region
      • Altai Republic (Gorno-Altayskaya Autonomous Oblast')
    [Clark, 1993 - "Hey's Mineral Index, 3rd Edition"]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; V. I. Vasil’ev, N. V. Pervukhina, S. V. Borisov, S. A. Magarill, D. Yu. Naumov and N. V. Kurat’eva (2010): Aktashite Cu6Hg3As4S12 from the Aktash deposit, Altai, Russia: Refinement and crystal chemical analysis of the structure. Geology of Ore Deposits 52, 656-661.
    USA
     
    • Nevada
      • Eureka Co.
        • Lynn District
    NBMG Spec. Pub. 31 Minerals of Nevada
      • Humboldt Co.
        • Osgood Mts
          • Potosi District
            • Adam Peak
    NBMG Spec. Pub. 31 Minerals of Nevada
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