Mineralogy Database

Fianelite Mineral Data

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General Fianelite Information

Help on Chemical  Formula: Chemical Formula: Mn++2V+++++(V+++++,As+++++)O7•2(H2O)
Help on Composition: Composition: Molecular Weight = 365.78 gm
   Manganese  30.04 %  Mn   38.79 % MnO
   Vanadium   24.37 %  V    43.51 % V2O5
   Arsenic     5.12 %  As    7.85 % As2O5
   Hydrogen    1.10 %  H     9.85 % H2O
   Oxygen     39.37 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+2V5+V5+0.75As0.25O7•2(H2O)
Help on Environment: Environment: In iron and manganese ores.
Help on IMA Status: IMA Status: Approved IMA 1995 (Dana # Added)
Help on Locality: Locality: The Fianel mine, Val Ferrera, Canton Graubunden, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Fianelite + Pronunciation Say FIANELITE
Help on Synonym: Synonym: ICSD 82414
  PDF 49-1810

Fianelite Image

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Comments: Small reddish-brown inclusions of fianelite in matrix.
Location: Fianel Mine, Val Ferrera, Grischun (Grisons; Graub├╝nden), Switzerland. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Fianelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5365:1:0.4606
Help on Cell Dimensions: Cell Dimensions: a = 7.809, b = 14.554, c = 6.705, Z = 2; beta = 93.75° V = 760.41 Den(Calc)= 1.60
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.039(1), 5.32(0.8), 2.723(0.6),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 0) ( 1 1 0) ( 0 4 1) ( 0 1 1)

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Fianelite

Help on Cleavage: Cleavage: {001} Good, {100} Good
Help on Color: Color: Orange red.
Help on Density: Density: 3.21 - 3.22, Average = 3.21
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Adamantine
Help on Streak: Streak: orange

Optical Properties of Fianelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.057 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.894 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.5125,KPDmeas= 0.2551,KC= 0.2706
Ncalc = 1.43 - 1.87
Help on Optical Data: Optical Data: Biaxial (?), a=1.82, b=1.82, , 2V(Meas)=5-10. Dispersion small.

Calculated Properties of Fianelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.07 gm/cc
note: Specific Gravity of Fianelite =3.22 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0007999094
Boson Index = 0.9992000906
Help on Photoelectric: Photoelectric: PEFianelite = 15.97 barns/electron
U=PEFianelite x rElectron Density= 48.99 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fianelite is Not Radioactive

Fianelite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.05)with miscellaneous formulae
  (40.05.16)Dana Group Fianelite! Mn2V(V,As)O7•2(H2O) P 21/n 2/m
Help on  Strunz Class: Strunz Class: 08.FC.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.F - Polyphosphates, Polyarsenates, [4]-Polyvanadates
  08.FC -Polyphosphates, etc., with H2O only
08.FC.05 Fianelite! Mn2V(V,As)O7•2(H2O) P 21/n 2/m

Other Fianelite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,p1270-1276,1996) OPTIC PROP.(Am.Min.,Vol.81,p1270-1276,1996)
Help on See Also: See Also: Links to other databases for Fianelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 08.FC.05





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