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Molysite Mineral Data
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General Molysite Information
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 Chemical Formula: |
Fe+++Cl3 |
| Composition: |
Molecular Weight = 162.21 gm |
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Iron 34.43 % Fe 49.23 % Fe2O3 |
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Chlorine 65.57 % Cl 65.57 % Cl |
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- % Cl -14.80 % -O=Cl2
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
Fe3+Cl3 |
| Environment: |
volcanic fumaroles. |
| IMA Status: |
Valid Species (Pre-IMA) 1868 |
| Locality: |
Vesuvius, Italy Link to MinDat.org Location Data. |
| Name Origin: |
Named from the Greek for a stain, as it stains the host rock. |
| Name Pronunciation: |
Molysite  |
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Molysite Image |
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Images:
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Molysite Crystallography
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| Axial Ratios: |
a:c = 1:2.91554 |
| Cell Dimensions: |
a = 5.92, c = 17.26, Z = 6; V = 523.86 Den(Calc)= 3.08 |
| Crystal System: |
Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: R 3 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.68(1), 2.08(0.4), 5.9(0.32), |
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Physical Properties of Molysite
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| Cleavage: |
{0001} Perfect |
| Color: |
Brownish red, Yellow, Purple red. |
| Density: |
2.904 |
| Habit: |
Encrustations - Forms crust-like aggregates on matrix. |
| Streak: |
brownish yellow |
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Optical Properties of Molysite
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| Optical Data: |
Uniaxial (-), w=1.6. |
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Calculated Properties of Molysite
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| Electron Density: |
Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Molysite =3.08 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0072991318
Boson Index = 0.9927008682 |
| Photoelectric: |
PEMolysite = 14.93 barns/electron
U=PEMolysite x rElectron Density= 43.66 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Molysite is Not Radioactive |
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Molysite Classification
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| Dana Class: |
09.03.01.01 (09)Anhydrous and Hydrated Halides |
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(09.03)Dana Type |
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(09.03.01)Dana Group |
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09.03.01.01 Molysite FeCl3 R 3 3 |
| Strunz Class: |
03.AC.10 03 - HALIDES |
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03.A - Simple Halides, Without H2O |
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03.AC -M:X = 1:3 |
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03.AC.10 Molysite FeCl3 R 3 3 |
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Other Molysite Information
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| References: |
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| 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 - 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
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Print or Cut-and-Paste your Molysite Specimen Label here :
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Molysite
Fe+++Cl3
Dana No: 09.03.01.01 Strunz No: 03.AC.10
Locality:
Notes:
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