Smythite Mineral Data

Smythite Mineral Data
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General Smythite Information

Help on Chemical Formula: Chemical Formula: (Fe,Ni)9S11 or (Fe,Ni)13S16
Help on Composition: Composition: Molecular Weight = 861.75 gm
   Iron    43.74 %  Fe
   Nickel  15.32 %  Ni
   Sulfur  40.93 %  S
          ______ 
          100.00 % 
Help on Empirical Formula: Empirical Formula: Fe2+6.75Ni2.25S11
Help on Environment: Environment: Low temperature oxidation product of the strongly magnetic monoclinic phase of pyrrhotite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1957
Help on Locality: Locality: Bloomington quarry, Monroe County, Indiana, USA Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Charles Henry Smyth (1866-1937), economic geologist and petrologist of Princeton University, New Jersey, USA.
Help on Name Pronunciation: Name Pronunciation: Smythite Say SMYTHITE
Help on Synonym: Synonym: ICSD 42537
  PDF 10-437
 

Smythite Image

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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
Help on Axial Ratios: Axial Ratios: a:c = 1:9.94236
Help on Cell Dimensions: Cell Dimensions: a = 3.47, c = 34.5, Z = 1; V = 359.76 Den(Calc)= 3.98
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.5(1), 2.994(0.31), 2.566(0.25),
Click Here for Large Smythite Structure Window Crystal Structure:

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Erd R C , Evans H T , Richter D H , American Mineralogist , 42 (1957) p.309-333, Smythite, a new iron sulfide, and associated pyrrhotite from Indiana

 

Physical Properties of Smythite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Brownish black, Light bronze.
Help on Density: Density: 4.32
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Thin - Flat dimensioned crystals.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Ferromagnetic
Help on Streak: Streak: dark gray
 

Optical Properties of Smythite

Help on RL Anisotrophism: RL Anisotrophism: Strong, in yellow and blue-gray.
Help on RL Color: RL Color: Pinkish cream.
Help on RL Pleochroism: RL Pleochroism: Strong, from grayish yellow to reddish brown.
 

Calculated Properties of Smythite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.83 gm/cc
note: Specific Gravity of Smythite =3.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PESmythite = 21.59 barns/electron
U=PESmythite x rElectron Density= 82.68 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Smythite is Not Radioactive
 

Smythite Classification
Help on Dana Class: 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
Help on Strunz Class: 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
Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: 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 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Smythite

(Fe,Ni)9S11 or (Fe,Ni)13S16
Dana No: 02.08.10.02 Strunz No: 02.CC.10
Locality:

 

Notes: