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 % V₂O₅

Hydrogen 2.78 % H 24.86 % H₂O

Oxygen 50.80 % O

______ ______

100.00 % 99.72 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_0.93V⁵⁺_1.87O_5.66•4.35(H₂O)

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

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:

PE_Ansermetite= 9.81 barns/electron
U=PE_Ansermetite x rElectron 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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Print or Cut-and-Paste your Ansermetite Specimen Label here :

Ansermetite

MnV2O6•4(H2O)
Dana No: 47.01.01.03 Strunz No: 04.HD.30
Locality:

Notes:

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