Mineralogy Database

Ansermetite Mineral Data

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General Ansermetite Information

Help on Chemical  Formula: Chemical Formula: MnV2O6•4(H2O)
Help on Composition: Composition: Molecular Weight = 315.28 gm
   Manganese  16.21 %  Mn   20.93 % MnO
   Vanadium   30.21 %  V    53.94 % V2O5
   Hydrogen    2.78 %  H    24.86 % H2O
   Oxygen     50.80 %  O
             ______        ______ 
             100.00 %       99.72 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+0.93V5+1.87O5.66•4.35(H2O)
Help on Environment: Environment: Metamorphosed synsedimentary exhalative Mn deposit. Unstable in air and aqueous solutions at temperatures above ~50-85 deg. C.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Fianel, Val Ferrera, Eastern Swiss Alps. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Stefan Ansermet (1964-), Swiss mineralogist.

Ansermetite Image

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Comments: Environmental scanning electron microscope image of the ansermetite crystals. (CanMin, v 41, p 1425).
Location: Fianel, Val Ferrera, Eastern Swiss Alps. Scale: Scale bar 20 µ-m.
© Canadian Mineralogist

Ansermetite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3004:1:0.6894
Help on Cell Dimensions: Cell Dimensions: a = 13.171, b = 10.128, c = 6.983, Z = 4; beta = 111.572° V = 866.26 Den(Calc)= 2.42
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.805(1)(110), 3.031(0.7)(131), 3.903(0.3)(220),4.5(0.3)(111), 5.064(0.2)(020), 5.69(0.2)(111),

Physical Properties of Ansermetite

Help on Cleavage: Cleavage: {110} Perfect
Help on Color: Color: Carmine red.
Help on Density: Density: 2.57
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: orange

Optical Properties of Ansermetite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.04 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.105 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3415,KPDmeas= 0.3216,KC= 0.3091
Ncalc = 1.75 - 1.79
Help on Optical Data: Optical Data: Biaxial (?), a=1.797, g=1.856, bire=0.0590

Calculated Properties of Ansermetite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.53 gm/cc
note: Specific Gravity of Ansermetite =2.57 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0010033771
Boson Index = 0.9989966229
Help on Photoelectric: Photoelectric: PEAnsermetite = 9.81 barns/electron
U=PEAnsermetite x rElectron Density= 24.79 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ansermetite is Not Radioactive

Ansermetite Classification

Help on  Dana Class: Dana Class: (47)Vanadium Oxysalts
  (47.01)(Normal VO3)
  (47.01.01)Rossite Group Rossite CaV2O6•4(H2O) P1 1 Metarossite CaV2O6•2(H2O) P1 1 Ansermetite! MnV2O6•4(H2O) C 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.HD.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.H - V[5,6] Vanadates
  04.HD -Inovanadates
04.HD.30 Ansermetite! MnV2O6•4(H2O) C 2/m 2/m

Other Ansermetite Information

Help on References: References: NAME( CanMin, v 41, p1423) PHYS. PROP.(CanMin, v 41, p1423) OPTIC PROP.(CanMin, v 41, p1423)
Help on See Also: See Also: Links to other databases for Ansermetite :
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

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Dana No: Strunz No: 04.HD.30





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