Gudmundite Mineral Data (original) (raw)

General Gudmundite Information

Help on Chemical Formula: Chemical Formula:

FeSbS

Help on Composition: Composition:

Molecular Weight = 209.66 gm

Iron 26.64 % Fe

Antimony 58.07 % Sb

Sulfur 15.29 % S

______

100.00 %

Help on Empirical Formula: Empirical Formula:

Fe3+SbS

Help on Environment: Environment:

A late stage hydrothermal mineral formed in sulfide deposits.

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1928

Help on Locality: Locality:

Gudmundstorp, Sala, V�stmanland, Sweden. Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after its locality.

Help on Name Pronunciation: Name Pronunciation:

Gudmundite + Pronunciation Say GUDMUNDITE

Help on Synonym: Synonym:

ICSD 24161

PDF 8-104

Gudmundite Image

Click Here for Larger Gudmundite Image in a New Browser Window Images:

Gudmundite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =1.6868:1:1.1346

Help on Cell Dimensions: Cell Dimensions:

a = 10.02, b = 5.94, c = 6.74, Z = 8; beta = 90° V = 401.16 Den(Calc)= 6.94

Help on Crystal System: Crystal System:

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

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.56(1), 1.912(0.8), 1.41(0.7),

Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
- Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

| | Forms:( 2 3 0) ( 1 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | -------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Gudmundite Structure Window 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

| | Buerger M J , American Mineralogist , 24 (1939) p.183-184, The crystal structure of gudmundite View Additional jPOWD Structure files for Gudmundite [1] | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Gudmundite

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Silvery white, Steel gray.

Help on Density: Density:

6.72

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Fracture: Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Help on Habit: Habit:

Crystalline - Fine - Occurs as well-formed fine sized crystals.

Help on Habit: Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Help on Hardness: Hardness:

5.5-6 - Knife Blade-Orthoclase

Help on Luster: Luster:

Metallic

Help on Streak: Streak:

grayish black

Optical Properties of Gudmundite

Help on RL Anisotrophism: RL Anisotrophism:

Strong, in yellow and red tints.

Help on RL Color: RL Color:

Silver white to steel-gray.

Help on RL Pleochroism: RL Pleochroism:

Distinct, in pure white and pinkish white.

Help on Reflectivity Reflectivity

Standardized Intensity (100%) Reflection Spectra of Gudmundite in Air

λ R1 R 2 ∑ R1(λ) ∑ R2(λ)
400 nm 45.10 52.60
420 nm 46.00 53.40
440 nm 46.90 54.20
460 nm 47.70 54.80
480 nm 48.30 55.30
500 nm 48.70 55.50
520 nm 49.30 55.50
540 nm 49.90 55.30
560 nm 50.40 55.10
580 nm 50.80 55.00
600 nm 51.10 54.70
620 nm 51.30 54.40
640 nm 51.50 54.00
660 nm 51.90 53.60
680 nm 52.40 53.10
700 nm 53.10 52.70

Calculated Relative Intensity Colors of Gudmundite in Air

RelativeIntensity 0% 20% 40% 60% 80% 100% 120% 140% 160% 180% 190%
R1
R2

Calculated Properties of Gudmundite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=6.16 gm/cc
note: Specific Gravity of Gudmundite =6.94 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0067940047
Boson Index = 0.9932059953

Help on Photoelectric: Photoelectric:

PEGudmundite = 202.04 barns/electron
U=PEGudmundite x rElectron Density=1,243.90 barns/cc.

Help on Radioactivity: Radioactivity:

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

Gudmundite Classification

Help on Dana Class: Dana Class:

02.12.04.02 (02)Sulfides - Including Selenides and Tellurides

(02.12)where Am Bn Xp, with (m+n):p=1:2

(02.12.04)Arsenopyrite Group (Monoclinic: P21/c (Pseudo-orthorhombic))

02.12.04.01 Arsenopyrite FeAsS P 21/c 2/m

02.12.04.02 Gudmundite FeSbS P 21/n 2/m

02.12.04.03 Osarsite (Os,Ru)AsS P 21/c 2/m

02.12.04.04 Ruarsite RuAsS P 21/c 2/m

02.12.04.05 Iridarsenite (Ir,Ru)As2 P 21/c 2/m

02.12.04.06 Clinosafflorite (Co,Fe,Ni)As2 P 21/n 2/m

Help on Strunz Class: Strunz Class:

02.EB.20 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.E - Metal Sulfides, M:S � 1:2

02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc.

02.EB.20 Arsenopyrite FeAsS P 21/c 2/m

02.EB.20 Gudmundite FeSbS P 21/n 2/m

02.EB.20 Ruarsite RuAsS P 21/c 2/m

02.EB.20 Paxite CuAs2 P 21/c 2/m

02.EB.20 Osarsite (Os,Ru)AsS P 21/c 2/m

Other Gudmundite Information

Help on References: References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

Help on See Also: See Also:

Links to other databases for Gudmundite :
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 - QUT Mineral Atlas
14 - Ruff.Info

Search for Gudmundite using:

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

Visit our Advertisers for Gudmundite :

A Bijoux Google Search for Gudmundite
Adam's Minerals Google Search for Gudmundite
Cape Minerals Google Search for Gudmundite
Dakota Matrix Minerals Google Search for Gudmundite
Excalibur Mineral Corp. Google Search for Gudmundite
Exceptional Minerals Google Search for Gudmundite
John Betts Fine Minerals Search for Gudmundite
McDougall Minerals Google Search for Gudmundite
Mineral News Website Link
Rock and Mineral Shows Google Search for Gudmundite
Weinrich Minerals, Inc. Google Search for Gudmundite

Ask about Gudmundite 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 Espa�ol

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

Gudmundite

FeSbS
Dana No: 02.12.04.02 Strunz No: 02.EB.20
Locality:

Notes: