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Ilsemannite Mineral Data
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General Ilsemannite Information
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 Chemical Formula: |
Mo3O8•n(H2O) (?) |
| Composition: |
Molecular Weight = 433.83 gm |
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Molybdenum 66.34 % Mo 99.54 % MoO3 |
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Hydrogen 0.46 % H 4.15 % H2O |
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Oxygen 33.19 % O |
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______ ______ |
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100.00 % 103.69 % = TOTAL OXIDE |
| Empirical Formula: |
Mo3O8•(H2O) |
| Environment: |
Alteration product of molybdenite. |
| IMA Status: |
Valid Species (Pre-IMA) 1871 |
| Locality: |
Blieberg, Carinthia, Austria. Link to MinDat.org Location Data. |
| Name Origin: |
Named for J. C. Ilsemann (1727-1822), mining commissioner at Clausthal, Harz, Germany. |
| Name Pronunciation: |
Ilsemannite + Pronunciation  |
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Ilsemannite Image |
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Images:
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Ilsemannite
Comments: Dark blue ilsemannite.
Location: Glückauf Shaft, Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Saxony, Germany.
Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag |
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Ilsemannite Crystallography
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| Crystal System: |
Amorphous- No Crystals |
| X Ray Diffraction: |
By Intensity(I/Io): 3.36(1), 1.64(0.5), 4.23(0.5), |
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Physical Properties of Ilsemannite
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| Cleavage: |
{???} Good |
| Color: |
Blue, Blue black, Black. |
| Habit: |
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite). |
| Hardness: |
5.5-6 - Knife Blade-Orthoclase |
| Streak: |
brownish black |
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Optical Properties of Ilsemannite
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| Optical Data: |
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Calculated Properties of Ilsemannite
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| Fermion Index: |
Fermion Index = 0.16
Boson Index = 0.84 |
| Photoelectric: |
PEIlsemannite = 110.06 barns/electron
U=PEIlsemannite x rElectron Density= . barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ilsemannite is Not Radioactive |
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Ilsemannite Classification
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| Dana Class: |
04.06.03.01 (04)Simple Oxides |
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(04.06)not classified |
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(04.06.03)Dana Group |
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04.06.03.01 Ilsemannite Mo3O8•n(H2O)(?) None |
| Strunz Class: |
04.FJ.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.F - Hydroxides (without V or U) |
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04.FJ -Hydroxides with H2O � (OH); corner-sharing octahedra |
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04.FJ.15 Ilsemannite Mo3O8•n(H2O)(?) None |
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04.FJ.15 Hydrotungstite H2WO4•(H2O) P 2/m 2/m |
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Other Ilsemannite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Ilsemannite :
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
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Ilsemannite
Mo3O8•n(H2O) (?)
Dana No: 04.06.03.01 Strunz No: 04.FJ.15
Locality:
Notes:
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