Getchellite Mineral Data

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.

Name Pronunciation:

Getchellite + Pronunciation

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 - Prismatic H-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),

Physical Properties of Getchellite

Cleavage:

{001} Perfect

Color:

Blood red, Dark red, Purple red.

Density:

3.92

Diaphaneity:

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:

Bulk Density (Electron Density)=3.59 gm/cc
note: Specific Gravity of Getchellite =3.98 gm/cc.

Fermion Index:

Fermion Index = 0.0024556496
Boson Index = 0.9975443504

Photoelectric:

PE_Getchellite= 157.76 barns/electron
U=PE_Getchellite x rElectron Density= 565.73 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Getchellite is Not Radioactive

Getchellite Classification

Dana Class:

02.11.01.02 (02)Sulfides - Including Selenides and Tellurides

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

(02.11.01)Orpiment Group

02.11.01.01 Orpiment As2S3 P 2₁/n 2/m

02.11.01.02 Getchellite AsSbS3 P 2₁/a 2/m

Strunz Class:

02.FA.35 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.F - Sulfides of Arsenic, Alkalies; Sulfides with Halide, Oxide, Hydroxide, H2O

02.FA -With As, (Sb), S

02.FA.35 Getchellite AsSbS3 P 2₁/a 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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - Philatelic Mineralogy
14 - QUT Mineral Atlas
15 - Ruff.Info

Search for Getchellite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Getchellite :

Ask about Getchellite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Getchellite

AsSbS3
Dana No: 02.11.01.02 Strunz No: 02.FA.35
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.