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Aktashite

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Formula:
Cu6Hg3As4S12
System:
Trigonal
Colour:
Gray-black
Lustre:
Metallic
Hardness:
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:
This page provides mineralogical data about Aktashite.

Classification of Aktashite

Redefined Approved 2008
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
3.4.13.2

3 : SULFOSALTS
4 : ø = 3
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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First Recorded Occurrence of Aktashite

Place of Conservation of First Recorded Material:
Central Siberian Geological Museum, Novosibirsk, Russia, III-14/1; National School of Mines, Paris, France.
Year of Discovery:
1968
Geological Setting of First Recorded Material:
Uncommon, of hydrothermal origin in complex polymetallic As–Hg-bearing deposits.

Occurrences of Aktashite

Geological Setting:
Hydrothermal veins

Physical Properties of Aktashite

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:
5.5 g/cm3 (Measured)    5.72 g/cm3 (Calculated)

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 Data:
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:
Cu6Hg3As4S12
Essential elements:
All elements listed in formula:
Common Impurities:
Zn,Sb

Relationship of Aktashite to other Species

Series:
Forms a series with Gruzdevite (see here)
2.GA.05ProustiteAg3AsS3
2.GA.05PyrargyriteAg3SbS3
2.GA.10PyrostilpniteAg3SbS3
2.GA.10XanthoconiteAg3AsS3
2.GA.15SamsoniteAg4MnSb2S6
2.GA.20SkinneriteCu3SbS3
2.GA.20WitticheniteCu3BiS3
2.GA.25LapieiteNiCuSbS3
2.GA.25MückeiteNiCu(Bi,Sb)S3
2.GA.25MalyshevitePdCuBiS3
2.GA.25LisiguangitePtCuBiS3
2.GA.30GruzdeviteCu6Hg3Sb4S12
2.GA.30NowackiiteCu6Zn3As4S12
2.GA.35LaffittiteAgHgAsS3
2.GA.40RouthieriteTl(Cu,Ag)(Hg,Zn)2(As,Sb)2S6
2.GA.40StalderiteTl(Cu,Ag)(Zn,Fe,Hg)2(As,Sb)2S6
2.GA.45ErniggliiteTl2SnAs2S6
2.GA.50BournonitePbCuSbS3
2.GA.50SeligmannitePbCuAsS3
2.GA.50SoučekitePbCuBi(S,Se)3
5.4.1NowackiiteCu6Zn3As4S12
5.4.2Florensovite(Cu,Zn)Cr1.5Sb0.5S4
5.4.4LaffittiteAgHgAsS3
5.4.5Galkhaite(Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12
5.4.6LivingstoniteHgSb4S6(S2)
5.4.7GruzdeviteCu6Hg3Sb4S12
5.4.8TvalchrelidzeiteHg3SbAsS3
5.4.9HakiteCu6[Cu4Hg2]Sb4Se13

Other Names for Aktashite

Name in Other Languages:
German:Aktashit
Simplified Chinese:硫砷汞铜矿
Spanish:Aktashita

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.

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

Localities for Aktashite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
Mineral and/or Locality  
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