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Arzakite

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Formula:
Hg2+3S2(Br,Cl)2
Colour:
Colorless to yellow
Lustre:
Adamantine, Vitreous
Hardness:
2 - 2½
Specific Gravity:
7.64 (Calculated)
Crystal System:
Monoclinic
Name:
For the type locality
Forms a series with lavrentievite.

Originally reported from Arzak Hg occurrence (Arzakskoye), Uyuk Range, Pii-Khem District, Tuva Republic, Eastern-Siberian Region, Russia.


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Classification of ArzakiteHide

Notes:
Unnamed (probably valid)
Approval History:
Unnamed, but probably valid.
Strunz 8th ed.:
2/F.14-50
Nickel-Strunz 10th (pending) ed.:
2.FC.15a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
C : With Cl, Br, I (halide-sulfides)
Dana 8th ed.:
10.3.4.2

10 : OXYHALIDES AND HYDROXYHALIDES
3 : A3(O,OH)2Xq
Hey's CIM Ref.:
6.5.2

6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
5 : Sulphohalides

Physical Properties of ArzakiteHide

Lustre:
Adamantine, Vitreous
Transparency:
Transparent
Colour:
Colorless to yellow
Comment:
Pale bog-brown, reddish brown, deepening on exposure to light
Streak:
Greyish yellow
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN100=82 - 103 - Vickers
Tenacity:
Brittle
Cleavage:
Perfect
Perfect in two directions parallel to elongation.
Density:
7.64 g/cm3 (Calculated)

Optical Data of ArzakiteHide

Type:
Anisotropic
Bireflectance:
Very weak, greyish white to grey
Reflectivity:
546nmR1=16.5%R2= 17.0%
590nmR1=15.2%R2= 16.7%
620nmR1=14.8%R2= 16.0%
656nmR1=14.5%R2= 16.0%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 17.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Grey
Internal Reflections:
Pale yellow to pale brown
Pleochroism:
Weak
Comments:
Greyish to yellowish brown in thin section

Chemical Properties of ArzakiteHide

Formula:
Hg2+3S2(Br,Cl)2
Elements listed:
Br, Cl, Hg, S - search for minerals with similar chemistry

Crystallography of ArzakiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 8.99(4) Å, b = 5.24(1) Å, c = 18.45(8) Å
β = 92.28(15)°
Ratio:
a:b:c = 1.716 : 1 : 3.521
Unit Cell V:
868.45 ų (Calculated from Unit Cell)
Z:
5
Morphology:
Complex intergrowths
Comment:
Possibly triclinic

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.05 (3)
3.99 (4)
3.41 (5)
3.02 (6)
2.63 (10)
2.313 (4)
1.594 (4)
Comments:
Arzak deposit, Russia.

Other Language Names for ArzakiteHide

German:Arzakit
Spanish:Arzakita

Relationship of Arzakite to other SpeciesHide

Related Minerals - Nickel-Strunz GroupingHide

2.FC.Demicheleite-(I)BiSIOrth. mmm (2/m 2/m 2/m) : Pnma
2.FC.05DjerfisheriteK6(Fe,Cu,Ni)25S26ClIso. m3m (4/m 3 2/m) : Pm3m
2.FC.05ThalfenisiteTl6(Fe,Ni,Cu)25S26Cl
2.FC.05Owensite(Ba,Pb)6(Cu,Fe,Ni)25S27Iso. m3m (4/m 3 2/m) : Pm3m
2.FC.10BartoniteK6Fe20S26STet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.FC.10ChlorbartoniteK6Fe24S26(Cl,S)Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.FC.15aCorderoiteHg2+3S2Cl2Iso. m3 (2/m 3)
2.FC.15cGrechishcheviteHg2+3S2(Br,Cl,I)2Tet.
2.FC.15aLavrentieviteHg2+3S2(Cl,Br)2Mon.
2.FC.15dRadtkeiteHg2+3S2IClMon. 2/m : B2/m
2.FC.15bKenhsuiteHg2+3S2Cl2Orth.
2.FC.20aCapgaronniteAgHgClSOrth.
2.FC.20cPerrouditeHg5Ag4S5(I,Br)2Cl2Orth. 2 2 2 : P21 21 2
2.FC.20bIltisiteHgAgS(Cl,Br)Hex.
2.FC.25Demicheleite-(Br)BiSBrOrth. mmm (2/m 2/m 2/m) : Pnma
2.FC.25Demicheleite-(Cl)BiSClOrth. mmm (2/m 2/m 2/m) : Pnma

Related Minerals - Dana Grouping (8th Ed.)Hide

10.3.4.1LavrentieviteHg2+3S2(Cl,Br)2Mon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

6.5.1CorderoiteHg2+3S2Cl2Iso. m3 (2/m 3)
6.5.3LavrentieviteHg2+3S2(Cl,Br)2Mon.
6.5.4GrechishcheviteHg2+3S2(Br,Cl,I)2Tet.
6.5.5RadtkeiteHg2+3S2IClMon. 2/m : B2/m
6.5.6CapgaronniteAgHgClSOrth.
6.5.7PerrouditeHg5Ag4S5(I,Br)2Cl2Orth. 2 2 2 : P21 21 2
6.5.8ArdaitePb19Sb13S35Cl7Mon.
6.5.9DadsonitePb23Sb25S60ClTric. 1 : P1
6.5.10RadhakrishnaitePbTe3(Cl,S)2Tet.
6.5.11DjerfisheriteK6(Fe,Cu,Ni)25S26ClIso. m3m (4/m 3 2/m) : Pm3m
6.5.12ThalfenisiteTl6(Fe,Ni,Cu)25S26Cl

Other InformationHide

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 ArzakiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Vasil'ev, V.I., Pal'chik, N.A., Grechishchev, O.K. (1984): Lavrentievite and arzakite, new natural sulfohalogenides of mercury. Geologiya i Geofizika, 7, 54-63 (in Russian).
American Mineralogist, 70, 873-874 (abs).
Vasil'ev, V.I., Lavrent'ev, Y.G. and Pal'chik, N.A. (1986): New data on arzakite and lavrentievite. Doklady Akademii Nauk SSSR, 290, 948–951 (in Russian).

Internet Links for ArzakiteHide

Localities for ArzakiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia
 
  • Eastern-Siberian Region
    • Tuva Republic
      • Pii-Khem District
        • Uyuk Range
Vasilev, V.I., Palchik, N.A., Grechishchev, O.K. (1984): Geologiya i Geofizika, 7, 54-63.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Pervukhina, N. V., Vasil’ev, V. I., Borisov, S. V., Magarill, S. A., & Naumov, D. Y. (2003). The crystal structure of a polymorph of Hg2+ 3S2Br1. 0Cl0. 5I0. 5. The Canadian Mineralogist, 41(6), 1445-1453.
          • Oorash-Khem River Valley
Pervukhina, N. V., Vasil’ev, V. I., Borisov, S. V., Magarill, S. A., & Naumov, D. Y. (2003). The crystal structure of a polymorph of Hg2+ 3S2Br1. 0Cl0. 5I0. 5. The Canadian Mineralogist, 41(6), 1445-1453.
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