Ansermetite Mineral Data
General Ansermetite Information
Chemical Formula:
MnV2O6•4(H2O)
Composition:
Molecular Weight = 315.28 gm
Manganese 16.21 % Mn 20.93 % MnO
Vanadium 30.21 % V 53.94 % V2 O5
Hydrogen 2.78 % H 24.86 % H2 O
Oxygen 50.80 % O
______ ______
100.00 % 99.72 % = TOTAL OXIDE
Empirical Formula:
Mn2+ 0.93 V5+ 1.87 O5.66 •4.35(H2 O)
Environment:
Metamorphosed synsedimentary exhalative Mn deposit. Unstable in air and aqueous solutions at temperatures above ~50-85 deg. C.
IMA Status:
Approved IMA 2003 (Dana # Added)
Locality:
Fianel, Val Ferrera, Eastern Swiss Alps. Link to MinDat.org Location Data.
Name Origin:
Named for Stefan Ansermet (1964-), Swiss mineralogist.
Ansermetite Image
Images:
Ansermetite
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
Axial Ratios:
a:b:c =1.3004:1:0.6894
Cell Dimensions:
a = 13.171, b = 10.128, c = 6.983, Z = 4; beta = 111.572° V = 866.26 Den(Calc)= 2.42
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
X Ray Diffraction:
By Intensity(I/Io ): 7.805(1)(110), 3.031(0.7)(1 31), 3.903(0.3)(220), 4.5(0.3)(111), 5.064(0.2)(020), 5.69(0.2)(1 11),
Physical Properties of Ansermetite
Cleavage:
{110} Perfect
Color:
Carmine red.
Density:
2.57
Diaphaneity:
Transparent
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
3 - Calcite
Luster:
Adamantine
Streak:
orange
Optical Properties of Ansermetite
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
Optical Data:
Biaxial (?), a=1.797, g=1.856, bire=0.0590
Calculated Properties of Ansermetite
Electron Density:
Bulk Density (Electron Density)=2.53 gm/cc note: Specific Gravity of Ansermetite =2.57 gm/cc.
Fermion Index:
Fermion Index = 0.0010033771 Boson Index = 0.9989966229
Photoelectric:
PEAnsermetite = 9.81 barns/electronU=PEAnsermetite x r Electron Density= 24.79 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Ansermetite is Not Radioactive
Ansermetite Classification
Dana Class:
47.01.01.03 (47) Vanadium Oxysalts
(47.01) (Normal VO3)
(47.01.01) Rossite Group
47.01.01.01 Rossite CaV2O6•4(H2O) P1 1
47.01.01.02 Metarossite CaV2O6•2(H2O) P1 1
47.01.01.03 Ansermetite ! MnV2O6•4(H2O) C 2/m 2/m
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
References:
NAME( CanMin, v 41, p1423) PHYS. PROP.(CanMin, v 41, p1423) OPTIC PROP.(CanMin, v 41, p1423)
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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Ansermetite
MnV2O6•4(H2O)
Dana No: 47.01.01.03 Strunz No: 04.HD.30
Locality:
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