Gersdorffite Mineral Data (original) (raw)
General Gersdorffite Information
Chemical Formula:
NiAsS
Composition:
Molecular Weight = 165.68 gm
Nickel 35.42 % Ni
Arsenic 45.22 % As
Sulfur 19.35 % S
______
100.00 %
Empirical Formula:
NiAsS
Environment:
In hydrothermal vein deposits formed at moderate tempertures.
IMA Status:
Valid Species (Pre-IMA) 1843
Locality:
Zinkwand, Schladming, Styria, Austria. Link to MinDat.org Location Data.
Name Origin:
Named after Herr von Gersdorff, owner of Schladming Mine, Austria.
Name Pronunciation:
Gersdorffite + Pronunciation 
Synonym:
Gray nickel pyrites
Nickel glance
Gersdorffite Image
Images:
 |
Gersdorffite Comments: Massive to coarse-grained lead-gray gersdorffite crystals. Location: Ait Ahmane Mine, Bou Azzer, Anti Atlas Mts., Morocco.Scale: Not Given. © John Veevaert |
|---|
Gersdorffite Crystallography
Cell Dimensions:
a = 5.719, Z = 4; V = 187.05 Den(Calc)= 5.88
Crystal System:
Isometric - TetartoidalH-M Symbol (2 3) Space Group: P 213
X Ray Diffraction:
By Intensity(I/Io): 2.545(1), 2.325(0.9), 1.716(0.8),
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:( 0 1 1) ( 1 1 1) ( 1 0 0) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | --------------------------------------------------------------------------------------------------------------------------------------------------- |
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
| | Bayliss P , American Mineralogist , 53 (1968) p.290-293, The crystal structure of disordered gersdorffite View Additional jPOWD Structure files for Gersdorffite [1] [2] | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Gersdorffite
Cleavage:
{100} Good, {010} Good, {001} Good
Color:
Gray, Grayish black, Silver white, Tin white.
Density:
5.9 - 6.33, Average = 6.11
Diaphaneity:
Opaque
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Habit:
Massive - Granular - Common texture observed in granite and other igneous rock.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
5.5 - Knife Blade
Luminescence:
Non-fluorescent.
Luster:
Metallic
Magnetism:
Nonmagnetic
Streak:
grayish black
Optical Properties of Gersdorffite
RL Color:
White.
Reflectivity
Standardized Intensity (100%) Reflection Spectra of Gersdorffite in Air
| λ | R |  |
∑ R(λ) |
|---|---|---|---|
| 400 nm | 47.40 |  |
|
| 420 nm | 46.60 |  |
|
| 440 nm | 45.80 |  |
|
| 460 nm | 45.40 |  |
|
| 480 nm | 45.10 |  |
|
| 500 nm | 45.00 |  |
|
| 520 nm | 45.00 |  |
|
| 540 nm | 45.00 |  |
|
| 560 nm | 45.10 |  |
|
| 580 nm | 45.30 |  |
|
| 600 nm | 45.50 |  |
|
| 620 nm | 45.90 |  |
|
| 640 nm | 46.20 |  |
|
| 660 nm | 46.50 |  |
|
| 680 nm | 46.90 |  |
|
| 700 nm | 47.30 |  |
Calculated Relative Intensity Colors of Gersdorffite in Air
| RelativeIntensity | 0% | 30% | 60% | 90% | 100% | 120% | 150% | 180% | 200% |
|---|---|---|---|---|---|---|---|---|---|
| R |
Calculated Properties of Gersdorffite
Electron Density:
Bulk Density (Electron Density)=5.47 gm/cc
note: Specific Gravity of Gersdorffite =5.88 gm/cc.
Fermion Index:
Fermion Index = 0.0054545213
Boson Index = 0.9945454787
Photoelectric:
PEGersdorffite = 47.24 barns/electron
U=PEGersdorffite x rElectron Density= 258.17 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gersdorffite is Not Radioactive
Gersdorffite Classification
Dana Class:
02.12.03.02 (02)Sulfides - Including Selenides and Tellurides
(02.12)where Am Bn Xp, with (m+n):p=1:2
(02.12.03)Cobaltite Group (Cubic or pseudocubic crystals)
02.12.03.01 Cobaltite CoAsS P ca21 mm2
02.12.03.02 Gersdorffite NiAsS P 213 2 3
02.12.03.03 Ullmannite NiSbS P 213 2 3
02.12.03.04 Willyamite (Co,Ni)SbS P 213 2 3
02.12.03.05 Tolovkite IrSbS P 213 2 3
02.12.03.06 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3
02.12.03.07 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3
02.12.03.08 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3
02.12.03.09 Jolliffeite (Ni,Co)AsSe P a3 2/m 3
02.12.03.10 Padmaite PdBiSe P 213 2 3
02.12.03.11 Michenerite (Pd,Pt)BiTe P 213 2 3
02.12.03.12 Maslovite PtBiTe P 213 2 3
02.12.03.13 Testibiopalladite PdTe(Sb,Te) P 213 2 3
02.12.03.14 Changchengite! IrBiS P 213 2 3
02.12.03.15 Milotaite! PdSbSe P 21/3 2 3
02.12.03.16 Kalungaite! PdAsSe Pa3 2/m 3
Strunz Class:
02.EB.25 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.25 Cobaltite CoAsS P ca21 mm2
02.EB.25 Changchengite! IrBiS P 213 2 3
02.EB.25 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3
02.EB.25 Gersdorffite NiAsS P 213 2 3
02.EB.25 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3
02.EB.25 Jolliffeite (Ni,Co)AsSe P a3 2/m 3
02.EB.25 Krutovite NiAs2 P a3 2/m 3
02.EB.25 Michenerite (Pd,Pt)BiTe P 213 2 3
02.EB.25 Maslovite PtBiTe P 213 2 3
02.EB.25 Mayingite IrBiTe P a3 2/m 3
02.EB.25 Padmaite PdBiSe P 213 2 3
02.EB.25 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3
02.EB.25 Ullmannite NiSbS P 213 2 3
02.EB.25 Tolovkite IrSbS P 213 2 3
02.EB.25 Testibiopalladite PdTe(Sb,Te) P 213 2 3
02.EB.25 Willyamite (Co,Ni)SbS P 213 2 3
02.EB.25 Kalungaite! PdAsSe Pa3 2/m 3
02.EB.25 Milotaite! PdSbSe P 21/3 2 3
Other Gersdorffite Information
References:
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
See Also:
Links to other databases for Gersdorffite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - HyperPhysics
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - Scandinavian mineral gallery
20 - WWW-MINCRYST
Search for Gersdorffite using:
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]
Visit our Advertisers for Gersdorffite :
A Bijoux Google Search for Gersdorffite
Adam's Minerals Google Search for Gersdorffite
Cape Minerals Google Search for Gersdorffite
Dakota Matrix Minerals Google Search for Gersdorffite
Excalibur Mineral Corp. Google Search for Gersdorffite
Exceptional Minerals Google Search for Gersdorffite
John Betts Fine Minerals Search for Gersdorffite
McDougall Minerals Google Search for Gersdorffite
Mineral News Website Link
Rock and Mineral Shows Google Search for Gersdorffite
Weinrich Minerals, Inc. Google Search for Gersdorffite
Ask about Gersdorffite 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 Gersdorffite Specimen Label here :
Gersdorffite
NiAsS
Dana No: 02.12.03.02 Strunz No: 02.EB.25
Locality:
Notes: