Ansermetite Mineral Data

Ansermetite Mineral Data

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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 - PrismaticH-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),

Crystal Structure:

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Brugger J , Berlepsch P , Meisser N , Armbruster T , The Canadian Mineralogist , 41 (2003) p.1423-1431, Ansermetite, MnV2O6.4H2O, a new mineral species with V5+ in five-fold coordination, from Val Ferrera, Eastern Swiss Alps, Locality: Val Ferrera, Eastern Swiss Alps

Physical Properties of Ansermetite

Cleavage:

[110] Perfect

Color:

Carmine red.

Density:

2.57

Diaphaniety:

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

Optical Data:

Biaxial (?), a=1.797, g=1.856, bire=0.0590

Calculated Properties of Ansermetite

Electron Density:

r_electron=2.53 gm/cc
note: r_Ansermetite=2.57 gm/cc.

Fermion Index

Fermion Index = 0.001
Boson Index = 0.999

Photoelectric:

PE_Ansermetite= 9.81 barns/electron
U=PE_Ansermetite x r_electron= 24.79 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ansermetite is Not Radioactive

Ansermetite Classification

Dana Class:

47.1.1.3 (47)Vanadium Oxysalts

(47.1)(Normal VO3)

(47.1.1)Dana Group

47.1.1.1 Rossite CaV2O6·4(H2O) P1 1

47.1.1.2 Metarossite CaV2O6·2(H2O) P1 1

47.1.1.3 Ansermetite ! MnV2O6·4(H2O) C 2/m 2/m

Strunz Class:

IV/G.07-48 IV - Oxides

IV/G - Vanadiumoxides (with V4+/5+) Chain vanadates with [V2O6]2-

IV/G.07 - Navajoite-Metadelrioite series

IV/G.07-10 Navajoite V2O5·3(H2O) C 2/m 2/m

IV/G.07-15 Ankinovichite! (Ni,Zn)Al4(VO3)2(OH)12(H2O)2.5 P 2₁/n 2/m

IV/G.07-20 Alvanite (Zn,Ni)Al4(VO3)2(OH)12·2(H2O) P 2₁/n 2/m

IV/G.07-30 Munirite NaVO3·(2-x)(H2O) P 2₁/a 2/m

IV/G.07-40 Metamunirite Na2[V2O6]orNaVO3 P nma 2/m 2/m 2/m

IV/G.07-45 Dickthomssenite! Mg(V2O6)·7(H2O) C 2/c 2/m

IV/G.07-48 Ansermetite MnV2O6·4(H2O) C 2/m 2/m

IV/G.07-50 Rossite CaV2O6·4(H2O) P1 1

IV/G.07-60 Metarossite CaV2O6·2(H2O) P1 1

IV/G.07-70 Delrioite CaSrV2O6(OH)2·3(H2O) I/a or I2/a 2/m

IV/G.07-80 Metadelrioite CaSrV2O6(OH)2·(H2O) P1 1

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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Ansermetite

MnV2O6·4(H2O)
Dana No: 47.1.1.3 Strunz No: IV/G.07-48
Locality:

Notes: