Mineralogy Database

Orebroite-III Mineral Data

Search Webmineral :

General Orebroite-III Information

Help on Chemical  Formula: Chemical Formula: Mn++6(Fe+++,Sb+++++)2Si2(O,OH)14
Help on Composition: Composition: Molecular Weight = 756.45 gm
   Manganese  43.58 %  Mn   56.27 % MnO
   Iron       11.07 %  Fe   14.25 % FeO
   Silicon     7.43 %  Si   15.89 % SiO2
   Antimony    8.05 %  Sb    9.63 % Sb2O3
   Hydrogen    0.27 %  H     2.38 % H2O
   Oxygen     29.61 %  O
             ______        ______ 
             100.00 %       98.41 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+6Fe2+1.5Sb0.5Si2O12(OH)2
Help on Environment: Environment: In a manganese deposit with dolomite and hausmannite.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Sjogruvan, Grythyttan, Orebro, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Orebroite-III + Pronunciation Say OREBROITE-III
Help on Synonym: Synonym: Oerebroite

Orebroite-III Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.5812
Help on Cell Dimensions: Cell Dimensions: a = 8.183, c = 4.756, Z = 1; V = 275.80 Den(Calc)= 4.55
Help on Crystal System: Crystal System: Trigonal - Pyramidal H-M Symbol (3) Space Group: P 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.096(1), 1.778(0.9), 2.334(0.7),

Physical Properties of Orebroite-III

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark brown.
Help on Density: Density: 4.77
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Slightly magnetic
Help on Streak: Streak: reddish brown

Optical Properties of Orebroite-III

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.085 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1903,KPDmeas= 0.1816,KC= 0.1983
Ncalc = 1.9 - 1.95
Help on Optical Data: Optical Data: Uniaxial (+), w=1.857, e=1.875, bire=0.0180.

Calculated Properties of Orebroite-III

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.29 gm/cc
note: Specific Gravity of Orebroite-III =4.55 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0059579947
Boson Index = 0.9940420053
Help on Photoelectric: Photoelectric: PEOrebroite-III = 40.24 barns/electron
U=PEOrebroite-III x rElectron Density= 172.56 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Orebroite-III is Not Radioactive

Orebroite-III Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.03)with 2+ and higher charged cations
  (07.03.01)containing Mn (Hexagonal, P3) Welinite-III Mn6(W,Mg)2Si2(O,OH)14 P 3 3 Franciscanite-III Mn6V2Si2(O,OH)14 P 3 3 Orebroite-III Mn6(Fe,Sb)2Si2(O,OH)14 P 3 3
Help on  Strunz Class: Strunz Class: 09.AF.07.5 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AF -Nesosilicates with additional anions;
09.AF.07.5 Franciscanite-III Mn6V2Si2(O,OH)14 P 3 3
09.AF.07.5 Franciscanite-VIII Mn3(V,[])1-x(SiO4)(O,OH)3(x=0.5) P 3 3
09.AF.07.5 Orebroite-III Mn6(Fe,Sb)2Si2(O,OH)14 P 3 3
09.AF.07.5 Welinite-III Mn6(W,Mg)2Si2(O,OH)14 P 3 3
09.AF.07.5 Welinite-VIII (Mn,Mg)3(W,Mn)1-x(SiO4)(O,OH)3(x=1/3) P 3 3

Other Orebroite-III Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Orebroite-III :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Orebroite-III using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Orebroite-III :

Ask about Orebroite-III here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa´┐Żol

Print or Cut-and-Paste your Orebroite-III Specimen Label here :


Dana No: Strunz No: 09.AF.07.5





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.