| |
 |
Smythite Mineral Data
|
|
|
General Smythite Information
|
 Chemical Formula: |
(Fe,Ni)9S11 or (Fe,Ni)13S16 |
| Composition: |
Molecular Weight = 861.75 gm |
| |
Iron 43.74 % Fe |
| |
Nickel 15.32 % Ni |
| |
Sulfur 40.93 % S |
| |
______ |
| |
100.00 % |
| Empirical Formula: |
Fe2+6.75Ni2.25S11 |
| Environment: |
Low temperature oxidation product of the strongly magnetic monoclinic phase of pyrrhotite. |
| IMA Status: |
Valid Species (Pre-IMA) 1957 |
| Locality: |
Bloomington quarry, Monroe County, Indiana, USA Link to MinDat.org Location Data. |
| Name Origin: |
Named for Charles Henry Smyth (1866-1937), economic geologist and petrologist of Princeton University, New Jersey, USA. |
| Name Pronunciation: |
Smythite  |
| Synonym: |
ICSD 42537 |
| |
PDF 10-437 |
| |
Smythite Image |
|
Images:
|
|
Smythite
Comments: Dull metallic massive smythite with pyrite. Part of drillcore.
Location: Helena, Boulder Co., Montana, USA.
Scale: Specimen Size 2.5x3 cm.
© Diederik Visser |
|
Smythite Crystallography
|
| Axial Ratios: |
a:c = 1:9.94236 |
| Cell Dimensions: |
a = 3.47, c = 34.5, Z = 1; V = 359.76 Den(Calc)= 3.98 |
| Crystal System: |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m |
| X Ray Diffraction: |
By Intensity(I/Io): 11.5(1), 2.994(0.31), 2.566(0.25), |
| |
Physical Properties of Smythite
|
| Cleavage: |
{0001} Perfect |
| Color: |
Brownish black, Light bronze. |
| Density: |
4.32 |
| Diaphaneity: |
Opaque |
| Fracture: |
Flexible - Flexible fragments. |
| Habit: |
Hexagonal - Six-sided crystal shape in cross-section or habit. |
| Habit: |
Platy - Sheet forms (e.g. micas). |
| Habit: |
Thin - Flat dimensioned crystals. |
| Hardness: |
4.5 - Between Fluorite and Apatite |
| Luster: |
Metallic |
| Magnetism: |
Ferromagnetic |
| Streak: |
dark gray |
| |
Optical Properties of Smythite
|
| RL Anisotrophism: |
Strong, in yellow and blue-gray. |
| RL Color: |
Pinkish cream. |
| RL Pleochroism: |
Strong, from grayish yellow to reddish brown. |
| |
Calculated Properties of Smythite
|
| Electron Density: |
Bulk Density (Electron Density)=3.83 gm/cc
note: Specific Gravity of Smythite =3.98 gm/cc.
|
| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PESmythite = 21.59 barns/electron
U=PESmythite x rElectron Density= 82.68 barns/cc.
|
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Smythite is Not Radioactive |
| |
Smythite Classification
|
| Dana Class: |
02.08.10.02 (02)Sulfides - Including Selenides and Tellurides |
| |
(02.08)where Am Bn Xp, with (m+n):p=1:1 |
| |
(02.08.10)Dana Group |
| |
02.08.10.01 Pyrrhotite Fe(1-x)S(x=0-0.17) A2/a 2/m |
| |
02.08.10.02 Smythite (Fe,Ni)9S11or(Fe,Ni)13S16 R 3m 3 2/m |
| Strunz Class: |
02.CC.10 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
| |
02.C - Metal Sulfides, M:S = 1:1 (and similar) |
| |
02.CC -With Ni, Fe, Co, PGE, etc. |
| |
02.CC.10 Smythite (Fe,Ni)9S11or(Fe,Ni)13S16 R 3m 3 2/m |
| |
02.CC.10 Pyrrhotite Fe(1-x)S(x=0-0.17) A2/a 2/m |
| |
02.CC.10 Troilite FeS P 63/mmc 6/m 2/m 2/m |
| |
Other Smythite Information
|
| References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Smythite :
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
15 - WWW-MINCRYST
Search for Smythite using:
[AOL]
[Bing]
[Dog Pile]
[GeoScienceWorld]
[HotBot]
[Ixquick]
[Lycos]
[MAMMA]
[Scirus]
[Teoma]
[WebCrawler]
[Wikipedia]
[YAHOO]
Visit our Advertisers for Smythite :
Ask about Smythite 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
Espaņol
Print or Cut-and-Paste your Smythite Specimen Label here :
|
Smythite
(Fe,Ni)9S11 or (Fe,Ni)13S16
Dana No: 02.08.10.02 Strunz No: 02.CC.10
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.