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Vesignieite Mineral Data

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General Vesignieite Information

Help on Chemical  Formula: Chemical Formula: Cu3Ba(VO4)2(OH)2
Help on Composition: Composition: Molecular Weight = 591.86 gm
   Barium    23.20 %  Ba   25.91 % BaO
   Vanadium  17.21 %  V    30.73 % V2O5
   Copper    32.21 %  Cu   40.32 % CuO
   Hydrogen   0.34 %  H     3.04 % H2O
   Oxygen    27.03 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu3Ba(VO4)2(OH)2
Help on Environment: Environment: Found as geodes in Mn ore at the locality.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1955
Help on Locality: Locality: Friedrichsroda, Thuringen, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the French mineral collector, Colonel Jean Paul Louis Vesignie (1870-1954) and former president of the Mineralgical Society of France.
Help on Name Pronunciation: Name Pronunciation: Vesignieite + Pronunciation Say VESIGNIEITE
Help on Synonym: Synonym: Calciovolborthite
  ICSD 67726
  PDF 44-1469

Vesignieite Image

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Comments: Green crystalline vesignieite crust with crudely developed radiating structure.
Location: Newmont Gold Mine, Carlin, Elko County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Vesignieite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7374:1:1.3045
Help on Cell Dimensions: Cell Dimensions: a = 10.27, b = 5.911, c = 7.711, Z = 2; beta = 116.42° V = 419.21 Den(Calc)= 4.69
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): 3.22(1), 2.7135(0.8), 2.5635(0.6),

Physical Properties of Vesignieite

Help on Cleavage: Cleavage: {001} Good
Help on Color: Color: Yellow green, Dark green, Olive green.
Help on Density: Density: 4 - 4.1, Average = 4.05
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light green

Optical Properties of Vesignieite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.26 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.088 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2356,KPDmeas= 0.2728,KC= 0.2165
Ncalc = 1.87 - 2.02
Help on Optical Data: Optical Data: Biaxial (-), a=2.053, b=2.129, g=2.133, bire=0.0800, 2V(Calc)=24, 2V(Meas)=60.

Calculated Properties of Vesignieite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.29 gm/cc
note: Specific Gravity of Vesignieite =4.69 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEVesignieite = 119.82 barns/electron
U=PEVesignieite x rElectron Density= 514.62 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vesignieite is Not Radioactive

Vesignieite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.13)Dana Group Vesignieite Cu3Ba(VO4)2(OH)2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.BH.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1
08.BH.45 Bayldonite (Cu,Zn)3Pb(AsO3OH)2(OH)2 A2/a 2/m
08.BH.45 Vesignieite Cu3Ba(VO4)2(OH)2 C 2/m 2/m

Other Vesignieite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Vesignieite :
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.BH.45





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