Molysite Mineral Data + Say MOLYSITE

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General Molysite Information

Help on Chemical  Formula: Chemical Formula: Fe+++Cl3
Help on Composition: Composition: Molecular Weight = 162.21 gm
   Iron      34.43 %  Fe   49.23 % Fe2O3
   Chlorine  65.57 %  Cl   65.57 % Cl
               -   %  Cl  -14.80 % -O=Cl2
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+Cl3
Help on Environment: Environment: volcanic fumaroles.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1868
Help on Locality: Locality: Vesuvius, Italy Link to MinDat.org Location Data.
 

Molysite Image

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Molysite

Comments: Yellow earthy molysite coatings.
Location: Sasso Pisano, Pisa, Tuscany, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Molysite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.91554
Help on Cell Dimensions: Cell Dimensions: a = 5.92, c = 17.26, Z = 6; V = 523.86 Den(Calc)= 3.08
Help on Crystal System: Crystal System: Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.68(1), 2.08(0.4), 5.9(0.32),
 

Physical Properties of Molysite

Help on Cleavage: Cleavage: [0001] Perfect
Help on Color: Color: Brownish red, Yellow, Purple red.
Help on Density: Density: 2.904
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Streak: Streak: brownish yellow
 

Optical Properties of Molysite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.43 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.462 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1948,KPDmeas= 0.2066,KC= 0.3623
Help on Optical Data: Optical Data: Uniaxial (-), w=1.6.
 

Calculated Properties of Molysite

Help on Electron Density: Electron Density:

relectron=2.76 gm/cc
note: rMolysite =2.90 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00729
Boson Index = 0.99271
Help on Photoelectric: Photoelectric:

PEMolysite = 14.93 barns/electron
U=PEMolysite x relectron= 41.17 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Molysite is Not Radioactive

 

Molysite Classification

Help on  Dana Class: Dana Class: 9.3.1.1 (9)Anhydrous and Hydrated Halides
  (9.3)Dana Type
  (9.3.1)Dana Group
 
9.3.1.1 Molysite FeCl3 R 3 3
Help on  Strunz Class: Strunz Class: III/A.09-10 III - Halogenides
  III/A - Simple Halogenides, without water Metal : Halogen = 1 : 2, 1 : 3
  III/A.09 - Fluorite series and related compounds
 
III/A.09-10 Molysite FeCl3 R 3 3
 
III/A.09-20 Chlorocalcite KCaCl3 Unk Ortho
 

Other Molysite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Molysite :
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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Molysite

Fe+++Cl3
Dana No: 9.3.1.1 Strunz No: III/A.09-10
Locality:

 

Notes:

 

 
   
 
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