Galkhaite
A valid IMA mineral species
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About Galkhaite
Formula:
(Hg5Cu)CsAs4S12
Originally assumed to be HgAsS2.
Colour:
Dark orange-red
Lustre:
Adamantine, Vitreous
Hardness:
3
Specific Gravity:
5.4
Crystal System:
Isometric
Member of:
Name:
For the the Gal-Khaya As-Hg-Sb deposit, Russia, one of the co-type localities.
Co-Type Localities:
Isostructural with:
Unique Identifiers
Mindat ID:
1643
Long-form identifier:
mindat:1:1:1643:4
IMA Classification of Galkhaite
Approved
First published:
1972
Classification of Galkhaite
2.GB.20
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
3.4.14.1
3 : SULFOSALTS
4 : ø = 3
3 : SULFOSALTS
4 : ø = 3
5.4.5
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
4 : Sulpharsenites etc. of Zn and Hg
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
4 : Sulpharsenites etc. of Zn and Hg
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 for Standard |
|---|---|---|
| Gkh | 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 Galkhaite
Adamantine, Vitreous
Transparency:
Opaque
Colour:
Dark orange-red
Streak:
Orange-yellow
Hardness:
3 on Mohs scale
Hardness:
VHN100=186 - 202 kg/mm2 - Vickers
Tenacity:
Brittle
Fracture:
Irregular/Uneven, Conchoidal
Density:
5.4 g/cm3 (Measured) 5.44 g/cm3 (Calculated)
Optical Data of Galkhaite
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 400nm | 30.5% |
| 420nm | 29.7% |
| 440nm | 29.3% |
| 460nm | 28.8% |
| 480nm | 28.0% |
| 500nm | 26.8% |
| 520nm | 26.6% |
| 540nm | 24.6% |
| 560nm | 23.8% |
| 580nm | 23.1% |
| 600nm | 22.6% |
| 620nm | 22.2% |
| 640nm | 21.9% |
| 660nm | 21.6% |
| 680nm | 21.4% |
| 700nm | 21.2% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 30.5%.
Chemistry of Galkhaite
Mindat Formula:
(Hg5Cu)CsAs4S12
Originally assumed to be HgAsS2.
Originally assumed to be HgAsS2.
Element Weights:
Common Impurities:
Fe,Se
Crystallography of Galkhaite
Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
I4 3m
Cell Parameters:
a = 10.365(3) Å
Unit Cell V:
1,113.55 ų (Calculated from Unit Cell)
Z:
12
Morphology:
Crystals to 1cm, granular aggregates.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005182 | Galkhaite | Chen T T, Szymanski J T (1981) The structure and chemistry of galkhaite, a mercury sulfosalt containing Cs and Tl The Canadian Mineralogist 19 571-581 | ![]() | 1981 | Getchell mine, Humboldt County, Nevada, USA | 0 | 293 |
| 0014754 | Galkhaite | Divjakovic V, Nowacki W (1975) Die kristallstruktur von galchait [Hg0.76(Cu,Zn)0.24]12Tl0.96(AsS3)8 Neues Jahrbuch fur Mineralogie, Monatshefte 1975 291-293 | 1975 | Getchell mine, Humboldt County, Nevada, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.01 Å | (100) |
| 2.78 Å | (80) |
| 4.27 Å | (70) |
| 7.40 Å | (50) |
| 1.841 Å | (50) |
| 2.604 Å | (29) |
| 1.569 Å | (29) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
Hydrothermal Hg-Au deposits
Type Occurrence of Galkhaite
Co-Type Localities:
Place of Conservation of Type Material:
Mining Institute, St. Petersburg, Russia, 1052/1–2.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 73879, 73880.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 73879, 73880.
Synonyms of Galkhaite
Other Language Names for Galkhaite
Relationship of Galkhaite to other Species
Member of:
Other Members of Galkhaite Group:
| Ferrovorontsovite | (Fe5Cu)Σ6TlAs4S12 | Iso. 4 3m : I4 3m |
| Vorontsovite | (Hg5Cu)Σ6TlAs4S12 | Iso. 4 3m : I4 3m |
Common Associates
Associations Based on Photo Data:
| 17 photos of Galkhaite associated with Quartz | SiO2 |
| 4 photos of Galkhaite associated with Fluorite | CaF2 |
| 3 photos of Galkhaite associated with Orpiment | As2S3 |
| 3 photos of Galkhaite associated with Stilbite Subgroup | M6-7[Al8-9Si27-28O72] · nH2O |
| 3 photos of Galkhaite associated with Realgar | As4S4 |
| 2 photos of Galkhaite associated with Pyrite | FeS2 |
| 2 photos of Galkhaite associated with Galena | PbS |
| 2 photos of Galkhaite associated with Calcite | CaCO3 |
| 1 photo of Galkhaite associated with Getchellite | AsSbS3 |
| 1 photo of Galkhaite associated with Stibnite | Sb2S3 |
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. | Hakite-(Cd) | Cu6(Cu4Cd2)Sb4Se12Se |
| 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 |
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 Galkhaite
mindat.org URL:
https://www.mindat.org/min-1643.html
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References for Galkhaite
Reference List:
Divjaković, V., Nowacki, W. (1975) Die Kristallstruktur von Galchait [Hg0,76(Cu,Zn)0,24]12Tl0,96(AsS3)8. Zeitschrift für Kristallographie - Crystalline Materials, 142 (3-4) 262 doi:10.1524/zkri.1975.142.3-4.262
Chen, T. T., Szymanski, J. T. (1981) The structure and chemistry of galkhaite, a mercury sulfosalt containing Cs and Tl. The Canadian Mineralogist, 19 (4) 571-581
Chen, T. T., Szymanski, J. T. (1982) A comparison of galkhaite from Nevada and from the type locality, Khaydarkan, Kirgizia, U.S.S.R. The Canadian Mineralogist, 20 (4) 575-577
Dunn, Pete J., Fleischer, Michael, Burns, Roger G., Pabst, Adolf (1983) New mineral names. American Mineralogist, 68 (3-4) 471-475 p.474
Borisov, S. V., Magarill, S. A., Pervukhina, N. V. (2009) Characteristic features of crystal chemistry of natural mercury-containing sulfides and sulfosalts. Journal of Structural Chemistry, 50 (5). 853-860 doi:10.1007/s10947-009-0127-7
Localities for Galkhaite
Showing 20 localities.
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.
Canada | |
| G.S.C.Misc.Rep.49 +1 other reference |
| Sabina (1991) | |
| Barrick Gold Corporation | |
China | |
| Xie et al. (2018) |
Iran | |
| Mehrabi et al. (1999) +2 other references |
Italy | |
| - (n.d.) +1 other reference |
Kyrgyzstan (TL) | |
| Grudzen et al. (1972) +2 other references |
| Kolesar et al. (1993) +1 other reference | |
Russia (TL) | |
| DAN-SSSR (1972) +3 other references |
| Kasatkin et al. (2021) |
USA | |
| Castor et al. (2004) |
| Rota (1989) |
| Barrick Gold Corporation | |
| Barrick Gold Corporation | |
| Jungles (1974) +2 other references |
| - (2005) | |
| - (2005) | |
| Barrick Gold Corporation | |
| - (2005) | |
| Colorado School of Mines museum ... |
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The
Getchell Mine, Adam Peak, Potosi Mining District, Osgood Mountains, Humboldt County, Nevada, USA