Vauquelinite Mineral Data

Vauquelinite Mineral Data
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General Vauquelinite Information

Help on Chemical Formula: Chemical Formula: Pb2Cu(CrO4)(PO4)(OH)
Help on Composition: Composition: Molecular Weight = 705.92 gm
   Chromium     7.37 %  Cr   14.17 % CrO3
   Copper       9.00 %  Cu   11.27 % CuO
   Phosphorus   4.39 %  P    10.05 % P2O5
   Hydrogen     0.14 %  H     1.28 % H2O
   Lead        58.70 %  Pb   63.24 % PbO
   Oxygen      20.40 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2Cu(CrO4)(PO4)(OH)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1818
Help on Locality: Locality: Beresov, Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Louis N. Vauquelin (1763-1829), French chemist and discoverer of chromium.
Help on Name Pronunciation: Name Pronunciation: Vauquelinite + Pronunciation Say VAUQUELINITE
Help on Synonym: Synonym: ICSD 26815
  PDF 13-302
 

Vauquelinite Image

Click Here for Larger Vauquelinite Image in a New Browser Window Images:
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Vauquelinite   Crocoite

Comments: Olive-greenish vauquelinite encrusting red crocoite.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Vauquelinite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =2.3689:1:1.647
Help on Cell Dimensions: Cell Dimensions: a = 13.754, b = 5.806, c = 9.563, Z = 4; beta = 94.57° V = 761.23 Den(Calc)= 6.16
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.293(1), 4.726(0.57), 2.894(0.51),
Help on Forms: Forms:

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

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Click Here for Large Vauquelinite Structure Window Crystal Structure:

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Fanfani L , Zanazzi P F , Zeitschrift fur Kristallographie , 126 (1968) p.433-443, The crystal structure of vauquelinite and the relationships to fornacite, Locality: Beresov, Ural Mountains, Russia

 

Physical Properties of Vauquelinite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Brown, Brownish green, Brownish black, Green, Black.
Help on Density: Density: 6
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Mammillary - Larger "breast-like" rounded forms resembling botryoidal (e.g. malachite).
Help on Habit: Habit: Reniform - "Kidney like" in shape (e.g.. hematite).
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine - Resinous
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: brownish
 

Optical Properties of Vauquelinite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.137 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.108 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1921,KPDmeas= 0.1972,KC= 0.1735
Ncalc = 2.04 - 2.07
Help on Optical Data: Optical Data: Biaxial (-), a=2.11, b=2.22, g=2.22, bire=0.1100
Help on Pleochroism (x): Pleochroism (x): pale green.
Help on Pleochroism (y): Pleochroism (y): pale brown.
Help on Pleochroism (z): Pleochroism (z): pale brown.
 

Calculated Properties of Vauquelinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.32 gm/cc
note: Specific Gravity of Vauquelinite =6.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.13
Boson Index = 0.87
Help on Photoelectric: Photoelectric: PEVauquelinite =1,049.35 barns/electron
U=PEVauquelinite x rElectron Density=5,585.68 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vauquelinite is Not Radioactive
 

Vauquelinite Classification
Help on Dana Class: Dana Class: 43.04.03.01 (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.03)Vauquelinite Group
 
43.04.03.01 Vauquelinite Pb2Cu(CrO4)(PO4)(OH) P 21/n 2/m
 
43.04.03.02 Fornacite Pb2Cu(CrO4)(AsO4)(OH) P 21/c 2/m
 
43.04.03.03 Molybdofornacite Pb2Cu[(As,P)O4][(Mo,Cr)O4](OH) P 21/c 2/m
Help on Strunz Class: Strunz Class: 07.FC.05 07 - SULFATES (SELENATES, TELLURATES)
  07.F - Chromates
  07.FC -With PO4, AsO4, SiO4
 
07.FC.05 Vauquelinite Pb2Cu(CrO4)(PO4)(OH) P 21/n 2/m
 

Other Vauquelinite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Vauquelinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - MinDAT
9 - MinMax(Deutsch)
10 - MinMax(English)
11 - Mineralienatlas (Deutsch)
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Vauquelinite

Pb2Cu(CrO4)(PO4)(OH)
Dana No: 43.04.03.01 Strunz No: 07.FC.05
Locality:

 

Notes: