Welinite-VIII  Mineral Data

Welinite-VIII Mineral Data

Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About

Advertisment
Our Mission is Simple: RMS will be the go-to portal for all mineral, gem and rock shows in the USA
John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.
For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an
Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.

General Welinite-VIII Information

Help on Chemical  Formula: Chemical Formula: (Mn++,Mg)3(W++++++,Mn+++)1-x(SiO4)(O,OH)3 (x=1/3)
Help on Composition: Composition: Molecular Weight = 402.69 gm
   Magnesium   1.21 %  Mg    2.00 % MgO
   Manganese  40.93 %  Mn   52.85 % MnO
   Silicon     6.97 %  Si   14.92 % SiO2
   Hydrogen    0.25 %  H     2.24 % H2O
   Tungsten   22.83 %  W    28.79 % WO3
   Oxygen     27.81 %  O
             ______        ______ 
             100.00 %      100.79 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+3W0.5Mg0.2SiO6(OH)
Help on Environment: Environment: In small amounts, as fillings in fissures with other mineral cutting hausmannite ore.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Langban, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Eric Welin, mineralogist and geochronologist, Swedish Museum of Natural History, Stockholm, Sweden.
Help on Name Pronunciation: Name Pronunciation: Welinite-VIII Say WELINITE-VIII
 

Search for Welinite-VIII Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

  

Welinite-VIII Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.58675
Help on Cell Dimensions: Cell Dimensions: a = 8.155, c = 4.785, Z = 2; V = 275.59 Den(Calc)= 4.85
Help on Crystal System: Crystal System: Trigonal - PyramidalH-M Symbol (3) Space Group: P 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.782(1), 2.332(0.8), 3.102(0.8),
 

Physical Properties of Welinite-VIII

Help on Cleavage: Cleavage: {001} Poor
Help on Color: Color: Brown, Reddish black.
Help on Density: Density: 4.47
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Resinous
Help on Streak: Streak: pale reddish brown
 

Optical Properties of Welinite-VIII

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.083 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1798,KPDmeas= 0.1951,KC= 0.196
Ncalc = 1.88 - 1.95
Help on Optical Data: Optical Data: Uniaxial (+), w=1.864, e=1.88, bire=0.0160.
 

Calculated Properties of Welinite-VIII

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.12 gm/cc
note: Specific Gravity of Welinite-VIII =4.47 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEWelinite-VIII = 278.78 barns/electron
U=PEWelinite-VIII x rElectron Density=1,147.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Welinite-VIII is Not Radioactive
 

Welinite-VIII Classification

Help on  Dana Class: Dana Class: 52.04.01.02 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.01)Welinite group
 
52.04.01.01 Orebroite-VIII Mn3(Sb,Fe)SiO4(O,OH)3 P 3 3
 
52.04.01.02 Welinite-VIII (Mn,Mg)3(W,Mn)1-x(SiO4)(O,OH)3(x=1/3) P 3 3
 
52.04.01.03 Kittatinnyite Ca2Mn2MnSi2O8(OH)4•9(H2O) P 63/mmc 6/m 2/m 2/m
 
52.04.01.04 Franciscanite-VIII Mn3(V,[])1-x(SiO4)(O,OH)3(x=0.5) 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 Welinite-VIII Information

Help on References: References: NAME( AntBidBlaNic2) 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 Welinite-VIII :
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 Welinite-VIII using:

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

Visit our Advertisers for Welinite-VIII :

A Bijoux Google Search for Welinite-VIII
Adam's Minerals Google Search for Welinite-VIII
Cape Minerals Google Search for Welinite-VIII
Dakota Matrix Minerals Google Search for Welinite-VIII
Excalibur Mineral Corp. Google Search for Welinite-VIII
Exceptional Minerals Google Search for Welinite-VIII
John Betts Fine Minerals Search for Welinite-VIII
McDougall Minerals Google Search for Welinite-VIII
Mineral News Website Link
Rock and Mineral Shows Google Search for Welinite-VIII
Weinrich Minerals, Inc. Google Search for Welinite-VIII

Ask about Welinite-VIII 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 Espaņol

Print or Cut-and-Paste your Welinite-VIII Specimen Label here :

Welinite-VIII

(Mn++,Mg)3(W++++++,Mn+++)1-x(SiO4)(O,OH)3 (x=1/3)
Dana No: 52.04.01.02 Strunz No: 09.AF.07.5
Locality:

 

Notes: