Galkhaite Mineral Data

Galkhaite Mineral Data +

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General Galkhaite Information

Chemical Formula:

(Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12

Composition:

Molecular Weight = 1,727.48 gm

Cesium 4.62 % Cs

Thallium 4.73 % Tl

Zinc 3.79 % Zn

Copper 5.52 % Cu

Mercury 40.64 % Hg

Antimony 2.82 % Sb

Arsenic 15.61 % As

Sulfur 22.27 % S

______

100.00 %

Empirical Formula:

Cs_0.6Tl_0.4Hg_3.5Cu_1.5ZnAs_3.6Sb_0.4S₁₂

Environment:

Hydrothermal Hg-Au deposits.

IMA Status:

Approved IMA 1972

Locality:

In the mercury deposits of Gal-Khaya, Yakutia, and Khaidarkan, Kirgizia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Synonym:

ICSD 38361

PDF 35-553

Galkhaite Image

Images:

Galkhaite

Comments: Cherry red crystals of galkhaite on matrix.
Location: Getchell mine, Humboldt County, Nevada, USA. Scale: Crystal size 1 mm.
© John Veevaert

Galkhaite Crystallography

Cell Dimensions:

a = 10.365, Z = 2; V = 1,113.55 Den(Calc)= 5.15

Crystal System:

Isometric - HextetrahedralH-M Symbol (4 3m) Space Group: I 43m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.992(1), 4.232(0.85), 2.77(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Chen T T , Szymanski J T , The Canadian Mineralogist , 19 (1981) p.571-581, The structure and chemistry of galkhaite, a mercury sulfosalt containing, Cs and Tl

View Additional jPOWD Structure files for Galkhaite
[1]

Physical Properties of Galkhaite

Color:

Orange red, Reddish, Black.

Density:

5.4

Diaphaniety:

Opaque

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Hardness:

3 - Calcite

Luster:

Vitreous - Adamantine

Streak:

orange

Optical Properties of Galkhaite

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Galkhaite in Air**
λ	R	∑ R(λ)
400 nm	30.50
420 nm	29.70
440 nm	29.30
460 nm	28.80
480 nm	28.00
500 nm	26.80
520 nm	26.60
540 nm	24.60
560 nm	23.80
580 nm	23.10
600 nm	22.60
620 nm	22.20
640 nm	21.90
660 nm	21.60
680 nm	21.40
700 nm	21.20

**Calculated Relative Intensity Colors of Galkhaite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	360%	380%
R

Calculated Properties of Galkhaite

Electron Density:

r_electron=4.47 gm/cc
note: r_Galkhaite=5.15 gm/cc.

Fermion Index

Fermion Index = 0.12595
Boson Index = 0.87405

Photoelectric:

PE_Galkhaite= 790.05 barns/electron
U=PE_Galkhaite x r_electron=3,533.45 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Galkhaite is Not Radioactive

Galkhaite Classification

Dana Class:

3.4.14.1 (3)Sulfides - Sulfosalts

(3.4)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.4.14)Dana Group

3.4.14.1 Galkhaite (Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12 I 43m 4 3m

Strunz Class:

II/E.11-10 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Sulfosalts with predominant Thallium and Mercury, x = 4.0 - 1.6

II/E.11 - Galkhaiite series

II/E.11-10 Galkhaite (Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12 I 43m 4 3m

Other Galkhaite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Galkhaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Galkhaite Specimen Label here :

Galkhaite

(Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12
Dana No: 3.4.14.1 Strunz No: II/E.11-10
Locality:

Notes: