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General Parnauite Information |
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 Chemical Formula: |
Cu9(AsO4)2(SO4)(OH)10•7(H2O) | ||
| 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 | |||
| Empirical Formula: |
Cu9(AsO4)2(SO4)(OH)10•7(H2O) | ||
| IMA Status: |
Approved IMA 1978 | ||
| Locality: |
Majuba Hill mine, Pershing County, Nevada, USA. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for John L. Parnau (1906-1990), U.S. Mineral collector who discovered the mineral. | ||
| Name Pronunciation: |
Parnauite + Pronunciation  |
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Parnauite Image | |||
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Images:
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Parnauite Crystallography |
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| Axial Ratios: |
a:b:c =1.0532:1:0.4231 | ||
| Cell Dimensions: |
a = 14.98, b = 14.223, c = 6.018, Z = 2; V = 1,282.20 Den(Calc)= 3.22 | ||
| Crystal System: |
Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2122 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 14.3(1), 4.52(0.6), 10.38(0.24), | ||
Physical Properties of Parnauite |
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| Cleavage: |
{???} Good | ||
| Color: |
Blue green, Green, Light blue. | ||
| Density: |
3.09 | ||
| Habit: |
Encrustations - Forms crust-like aggregates on matrix. | ||
| Habit: |
Rosette - Bundled tabular aggregates resembling rose flower petals. | ||
| Habit: |
Scaly - Morphology like fish scales. | ||
| Hardness: |
2 - Gypsum | ||
| Streak: |
greenish white | ||
Optical Properties of Parnauite |
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| 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 |
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| Optical Data: |
Biaxial (-), a=1.68, b=1.704, g=1.712, bire=0.0320, 2V(Calc)=58, 2V(Meas)=60. | ||
| Pleochroism (x): |
pale green. | ||
| Pleochroism (y): |
yellow green. | ||
| Pleochroism (z): |
blue green. | ||
Calculated Properties of Parnauite |
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| Electron Density: |
Bulk Density (Electron Density)=2.98 gm/cc note: Specific Gravity of Parnauite =3.09 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0003758749 Boson Index = 0.9996241251 |
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| Photoelectric: |
PEParnauite = 28.42 barns/electron U=PEParnauite x rElectron Density= 84.70 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Parnauite is Not Radioactive |
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Parnauite Classification |
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| Dana Class: |
43.05.13.01 (43)Compound Phosphates, etc. | ||
| (43.05)(Hydrated Compound Anions With Hydroxyl or Halogen) | |||
| (43.05.13)Dana Group | |||
| 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 | |||
Other Parnauite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | ||
| 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 Search for Parnauite using: Visit our Advertisers for Parnauite : A Bijoux Google Search for ParnauiteAdam's Minerals Google Search for Parnauite Cape Minerals Google Search for Parnauite Dakota Matrix Minerals Google Search for Parnauite Excalibur Mineral Corp. Google Search for Parnauite Exceptional Minerals Google Search for Parnauite John Betts Fine Minerals Search for Parnauite McDougall Minerals Google Search for Parnauite Mineral News Website Link Rock and Mineral Shows Google Search for Parnauite Weinrich Minerals, Inc. Google Search for Parnauite Ask about Parnauite here : Print or Cut-and-Paste your Parnauite Specimen Label here :
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