Mineralogy Database

Vernadite Mineral Data

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General Vernadite Information

Help on Chemical  Formula: Chemical Formula: (Mn++++,Fe+++,Ca,Na)(O,OH)2•n(H2O)
Help on Composition: Composition: Molecular Weight = 108.16 gm
   Sodium      2.13 %  Na    2.87 % Na2O
   Calcium     3.71 %  Ca    5.18 % CaO
   Manganese  30.48 %  Mn   48.23 % MnO2
   Iron       10.33 %  Fe   14.76 % Fe2O3
   Hydrogen    3.08 %  H    27.48 % H2O
   Oxygen     50.29 %  O
             ______        ______ 
             100.00 %       98.52 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn4+0.6Fe3+0.2Ca0.1Na0.1O1.5(OH)0.5•1.4(H2O)
Help on Environment: Environment: Marine and fresh water iron-manganese crusts and concretions, often in relict bacterial forms.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1944
Help on Locality: Locality: Somewhere in Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Vladimir Ivanovich Vernadskii (1863-1945), Russian natrualist and geochemist.
Help on Name Pronunciation: Name Pronunciation: Vernadite + Pronunciation Say VERNADITE
Help on Synonym: Synonym: Wad
 

Vernadite Image

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  Vernadite

Comments: Black sub-metallic rounded vernadite crystals.
Location: Km3, Laurium, Attiki, Greece. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Vernadite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.28826
Help on Cell Dimensions: Cell Dimensions: a = 9.866, c = 2.844, Z = 4; V = 276.83 Den(Calc)= 2.60
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 4/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.39(1), 2.15(0.6), 3.11(0.6),
 

Physical Properties of Vernadite

Help on Color: Color: Black, Chocolate brown.
Help on Density: Density: 3
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Streak: Streak: chocolate brown
 

Optical Properties of Vernadite

Help on Optical Data: Optical Data: NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.3463) where Ncalc=Dcalc*KC+1
NCalc= 2.04 - from Gladstone-Dale relationship (KC = 0.3463) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Vernadite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.59 gm/cc
note: Specific Gravity of Vernadite =2.60 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.002485243
Boson Index = 0.997514757
Help on Photoelectric: Photoelectric: PEVernadite = 11.22 barns/electron
U=PEVernadite x rElectron Density= 29.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vernadite is Not Radioactive
 

Vernadite Classification

Help on  Dana Class: Dana Class: 04.04.09.01 (04)Simple Oxides
  (04.04)with a cation charge of 4+ (A++++ O2)
  (04.04.09)Dana Group
 
04.04.09.01 Vernadite (Mn,Fe,Ca,Na)(O,OH)2•n(H2O) I 4/m 4/m
Help on  Strunz Class: Strunz Class: 04.FE.40 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FE -Hydroxides with OH, without H2O; sheets of edge-sharing octahedra
 
04.FE.40 Feroxyhyte FeO(OH) Unk Hex
 
04.FE.40 Vernadite (Mn,Fe,Ca,Na)(O,OH)2•n(H2O) I 4/m 4/m
 

Other Vernadite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Vernadite :
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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Print or Cut-and-Paste your Vernadite Specimen Label here :

Vernadite

(Mn++++,Fe+++,Ca,Na)(O,OH)2•n(H2O)
Dana No: 04.04.09.01 Strunz No: 04.FE.40
Locality:

 

Notes:

 

 
   
 


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