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Magnussonite Mineral Data

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General Magnussonite Information

Help on Chemical  Formula: Chemical Formula: Mn++5As+++3O9(OH,Cl)
Help on Composition: Composition: Molecular Weight = 665.07 gm
   Manganese  41.30 %  Mn   53.33 % MnO
   Arsenic    33.80 %  As   44.62 % As2O3
   Hydrogen    0.11 %  H     1.02 % H2O
   Chlorine    1.33 %  Cl    1.33 % Cl
                -   %   Cl   -0.30 % -O=Cl2   
   Oxygen     23.46 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+5As3O9(OH)0.75Cl0.25
Help on Environment: Environment: In a metamorphosed Fe-Mn orebody.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Langban, Varmland, and in the Brattfors mine, Nordmark, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Nils Harald Magnusson (1890-1976), formerly Director, Geological Survey of Sweden, for his contributions to knowledge of the Langban mine.
Help on Name Pronunciation: Name Pronunciation: Magnussonite + Pronunciation Say MAGNUSSONITE
Help on Synonym: Synonym: ICSD 100494
  PDF 10-407

Magnussonite Image

Click Here for Larger   Image in a New Browser Window Images:
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Comments: Bright green crystalline magnussonite grains with willemite.
Location: Sterling Mine, Ogdensburg, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnussonite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 16.05, Z = 16; V = 4,134.52 Den(Calc)= 4.27
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: I a3d
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.85(1), 2.47(0.3), 3.12(0.3),

Physical Properties of Magnussonite

Help on Color: Color: Blue green, Grass green, Dark red.
Help on Density: Density: 4.3
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Magnussonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.055 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2295,KPDmeas= 0.2279,KC= 0.2176
Ncalc = 1.93 - 1.94
Help on Optical Data: Optical Data: Isotropic, n=1.98.

Calculated Properties of Magnussonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.97 gm/cc
note: Specific Gravity of Magnussonite =4.30 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001127562
Boson Index = 0.9998872438
Help on Photoelectric: Photoelectric: PEMagnussonite = 34.79 barns/electron
U=PEMagnussonite x rElectron Density= 138.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magnussonite is Not Radioactive

Magnussonite Classification

Help on  Dana Class: Dana Class: (46)Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
  (46.01)where (A B)m (XO3)p Zq
  (46.01.03)Dana Group Magnussonite Mn5As3O9(OH,Cl) I a3d 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 04.JB.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.J - Arsenites, Antimonites, Bismuthites, Sulfites,
  04.JB -Arsenites, antimonites, bismuthites; with additional anions, without H2O
04.JB.15 Magnussonite Mn5As3O9(OH,Cl) I a3d 4/m 3 2/m

Other Magnussonite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Magnussonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 04.JB.15





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