Smythite Mineral Data + Say SMYTHITE


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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 Synonym: Synonym: ICSD 42537
  PDF 10-437
 

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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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Help on Above


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 Diaphaniety: Diaphaniety: 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:

relectron=3.83 gm/cc
note: rSmythite =3.98 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01407
Boson Index = 0.98593
Help on Photoelectric: Photoelectric:

PESmythite = 21.59 barns/electron
U=PESmythite x relectron= 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: 2.8.10.2 (2)Sulfides - Including Selenides and Tellurides
  (2.8)where Am Bn Xp, with (m+n):p=1:1
  (2.8.10)Dana Group
 
2.8.10.1 Pyrrhotite Fe(1-x)S(x=0-0.17) A2/a 2/m
 
2.8.10.2 Smythite (Fe,Ni)9S11or(Fe,Ni)13S16 R 3m 3 2/m
Help on  Strunz Class: Strunz Class: II/C.19-50 II - Sulfides and sulphosalts
  II/C - Sulfides with metal: sulfur, selenium and tellurium = 1:1
  II/C.19 - Troilite - Pyrrhotite - Haideite series
 
II/C.19-10 Troilite FeS P 63/mmc 6/m 2/m 2/m
 
II/C.19-20 Pyrrhotite Fe(1-x)S(x=0-0.17) A2/a 2/m
 
II/C.19-25 Jaipurite* CoS P 63/mmc 6/m 2/m 2/m
 
II/C.19-30 Westerveldite (Fe,Ni,Co)As Pnam 2/m 2/m 2/m
 
II/C.19-40 Modderite (Co,Fe)As Pmcn 2/m 2/m 2/m
 
II/C.19-50 Smythite (Fe,Ni)9S11or(Fe,Ni)13S16 R 3m 3 2/m
 
II/C.19-60 Achavalite* FeSe P 63/mmc 6/m 2/m 2/m
 
II/C.19-70 Heideite (Fe,Cr)1x(Ti,Fe)2S4 I2/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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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

Smythite

(Fe,Ni)9S11 or (Fe,Ni)13S16
Dana No: 2.8.10.2 Strunz No: II/C.19-50
Locality:

 

Notes:

 

 
   
 
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