Getchellite Mineral Data

Getchellite Mineral Data +

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General Getchellite Information

Chemical Formula:

AsSbS3

Composition:

Molecular Weight = 293.81 gm

Antimony 42.27 % Sb

Arsenic 24.99 % As

Sulfur 32.74 % S

______

100.00 %

Empirical Formula:

As_0.98Sb_1.02S₃

Environment:

In an epithermal gold deposit formed in a narrow, steeply-dipping fault zone cutting interbedded Paleozoic (?) shales, argillites, and limestones, near a granodiorite intrusive.

IMA Status:

Approved IMA 1965

Locality:

At the Getchell mine, about 32 km northeast of Golconda, Humboldt Co., Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

For the locality.

Synonym:

ICSD 42113

PDF 21-53

Getchellite Image

Images:

Getchellite

Comments: Bright red getchellite on matrix.
Location: Khaidarkan (Chaidarkan) Sb-Hg deposit, Fergana Valley, Osh District, Kyrgyzstan. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Getchellite Crystallography

Axial Ratios:

a:b:c =1.3235:1:1.122

Cell Dimensions:

a = 11.949, b = 9.028, c = 10.13, Z = 8; beta = 116.15° V = 980.93 Den(Calc)= 3.98

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 2.89(1), 4.44(0.8), 3.63(0.7),

Crystal Structure:

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

Kyono A , Kimata M , American Mineralogist , 89 (2004) p.696-700, Structural reinvestigation of getchellite As0.98Sb1.02S3.00

View Additional jPOWD Structure files for Getchellite
[1]

Physical Properties of Getchellite

Cleavage:

[001] Perfect

Color:

Blood red, Dark red, Purple red.

Density:

3.92

Diaphaniety:

Nearly opaque

Fracture:

Flexible - Flexible fragments.

Habit:

Micaceous - Platy texture with "flexible" plates.

Hardness:

1.5-2 - Talc-Gypsum

Luster:

Vitreous - Pearly

Streak:

orange red

Optical Properties of Getchellite

Optical Data:

Biaxial (+), a=2.72, 2V(Meas)=<46. Dispersion r > v strong.

RL Anisotrophism:

Weak.

RL Color:

Dark blood red, tarnishing to green to purple iridescence..

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Getchellite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	34.80	37.90
420 nm	34.20	37.40
440 nm	33.60	36.90
460 nm	32.70	36.00
480 nm	31.80	34.80
500 nm	30.70	33.50
520 nm	29.50	31.90
540 nm	28.10	30.60
560 nm	27.00	29.40
580 nm	26.20	28.60
600 nm	25.70	28.00
620 nm	25.20	27.40
640 nm	24.90	27.00
660 nm	24.50	26.80
680 nm	24.20	26.50
700 nm	23.80	26.10

**Calculated Relative Intensity Colors of Getchellite in Air**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%	340%
R₁
R₂

Calculated Properties of Getchellite

Electron Density:

r_electron=3.59 gm/cc
note: r_Getchellite=3.98 gm/cc.

Fermion Index

Fermion Index = 0.00245
Boson Index = 0.99755

Photoelectric:

PE_Getchellite= 157.76 barns/electron
U=PE_Getchellite x r_electron= 565.73 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Getchellite is Not Radioactive

Getchellite Classification

Dana Class:

2.11.1.2 (2)Sulfides - Including Selenides and Tellurides

(2.11)where Am Bn Xp, with (m+n):p=2:3

(2.11.1)Dana Group

2.11.1.1 Orpiment As2S3 P 2₁/n 2/m

2.11.1.2 Getchellite AsSbS3 P 2₁/a 2/m

Strunz Class:

II/F.03-10 II - Sulfides and sulphosalts

II/F - Sulfides with nonmetallic properties, Arsenic-Sulfides

II/F.03 - Getchellite - Wakabayashilite series

II/F.03-10 Getchellite AsSbS3 P 2₁/a 2/m

II/F.03-20 Wakabayashilite (As,Sb)11S18 P 6₃/mmc 6/m 2/m 2/m

Other Getchellite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990, AmMin, v 89, p 696) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Getchellite :
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 - Philatelic Mineralogy 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Getchellite

AsSbS3
Dana No: 2.11.1.2 Strunz No: II/F.03-10
Locality:

Notes: