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Ilsemannite Mineral Data

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General Ilsemannite Information

Help on Chemical  Formula: Chemical Formula: Mo3O8•n(H2O) (?)
Help on Composition: Composition: Molecular Weight = 433.83 gm
   Molybdenum  66.34 %  Mo   99.54 % MoO3
   Hydrogen     0.46 %  H     4.15 % H2O
   Oxygen      33.19 %  O
              ______        ______ 
              100.00 %      103.69 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mo3O8•(H2O)
Help on Environment: Environment: Alteration product of molybdenite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1871
Help on Locality: Locality: Blieberg, Carinthia, Austria. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for J. C. Ilsemann (1727-1822), mining commissioner at Clausthal, Harz, Germany.
Help on Name Pronunciation: Name Pronunciation: Ilsemannite + Pronunciation Say ILSEMANNITE

Ilsemannite Image

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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

Ilsemannite Crystallography

Help on Crystal System: Crystal System: Amorphous- No Crystals
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.36(1), 1.64(0.5), 4.23(0.5),

Physical Properties of Ilsemannite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Blue, Blue black, Black.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Streak: Streak: brownish black

Optical Properties of Ilsemannite

Help on Optical Data: Optical Data:

Calculated Properties of Ilsemannite

Help on Fermion Index: Fermion Index: Fermion Index = 0.16
Boson Index = 0.84
Help on Photoelectric: Photoelectric: PEIlsemannite = 110.06 barns/electron
U=PEIlsemannite x rElectron Density= . barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ilsemannite is Not Radioactive

Ilsemannite Classification

Help on  Dana Class: Dana Class: (04)Simple Oxides
  (04.06)not classified
  (04.06.03)Dana Group Ilsemannite Mo3O8•n(H2O)(?) None
Help on  Strunz Class: Strunz Class: 04.FJ.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FJ -Hydroxides with H2O � (OH); corner-sharing octahedra
04.FJ.15 Ilsemannite Mo3O8•n(H2O)(?) None
04.FJ.15 Hydrotungstite H2WO4•(H2O) P 2/m 2/m

Other Ilsemannite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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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Mo3O8•n(H2O) (?)
Dana No: Strunz No: 04.FJ.15