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Parnauite Mineral Data

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General Parnauite Information

Help on Chemical  Formula: Chemical Formula: Cu9(AsO4)2(SO4)(OH)10•7(H2O)
Help on Composition: Composition: Molecular Weight = 1,242.00 gm
   Copper    46.05 %  Cu   51.84 % Cu2O
   Arsenic   12.06 %  As   18.51 % As2O5
   Hydrogen   1.95 %  H    17.41 % H2O
   Sulfur     2.58 %  S     6.45 % SO3
   Oxygen    37.36 %  O
            ______        ______ 
            100.00 %       94.20 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu9(AsO4)2(SO4)(OH)10•7(H2O)
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Majuba Hill mine, Pershing County, Nevada, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John L. Parnau (1906-1990), U.S. Mineral collector who discovered the mineral.
Help on Name Pronunciation: Name Pronunciation: Parnauite + Pronunciation Say PARNAUITE

Parnauite Image

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Comments: Green tabular crystals of parnauite.
Location: Graul, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Parnauite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0532:1:0.4231
Help on Cell Dimensions: Cell Dimensions: a = 14.98, b = 14.223, c = 6.018, Z = 2; V = 1,282.20 Den(Calc)= 3.22
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 2122
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 14.3(1), 4.52(0.6), 10.38(0.24),

Physical Properties of Parnauite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Blue green, Green, Light blue.
Help on Density: Density: 3.09
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Rosette - Bundled tabular aggregates resembling rose flower petals.
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Hardness: Hardness: 2 - Gypsum
Help on Streak: Streak: greenish white

Optical Properties of Parnauite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.019 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.217,KPDmeas= 0.2261,KC= 0.2219
Ncalc = 1.69 - 1.71
Help on Optical Data: Optical Data: Biaxial (-), a=1.68, b=1.704, g=1.712, bire=0.0320, 2V(Calc)=58, 2V(Meas)=60.
Help on Pleochroism (x): Pleochroism (x): pale green.
Help on Pleochroism (y): Pleochroism (y): yellow green.
Help on Pleochroism (z): Pleochroism (z): blue green.

Calculated Properties of Parnauite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.98 gm/cc
note: Specific Gravity of Parnauite =3.09 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003758749
Boson Index = 0.9996241251
Help on Photoelectric: Photoelectric: PEParnauite = 28.42 barns/electron
U=PEParnauite x rElectron Density= 84.70 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parnauite is Not Radioactive

Parnauite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.05)(Hydrated Compound Anions With Hydroxyl or Halogen)
  (43.05.13)Dana Group Parnauite Cu9(AsO4)2(SO4)(OH)10•7(H2O) P 2122 2 2 2
Help on  Strunz Class: Strunz Class: 08.DF.35 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DF -With only medium-sized cations, (OH,etc.):RO4 > 3:1
08.DF.35 Parnauite Cu9(AsO4)2(SO4)(OH)10•7(H2O) P 2122 2 2 2

Other Parnauite 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 Parnauite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 08.DF.35





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