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Chenevixite Mineral Data

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General Chenevixite Information

Help on Chemical  Formula: Chemical Formula: Cu2Fe+++2(AsO4)2(OH)4•(H2O)
Help on Composition: Composition: Molecular Weight = 602.67 gm
   Iron      18.53 %  Fe   26.50 % Fe2O3
   Copper    21.09 %  Cu   26.40 % CuO
   Arsenic   24.86 %  As   38.14 % As2O5
   Hydrogen   1.00 %  H     8.97 % H2O
   Oxygen    34.51 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2Fe3+2(AsO4)2(OH)4•(H2O)
Help on Environment: Environment: Secondary mineral in the oxidized zone of some hydrothermal polymetallic mineral deposits. Forms a series with luetheite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1866
Help on Locality: Locality: American Eagle mine, Utah, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Richard Chenevix (1774-1830), Irish chemist, who early analyzed a Cornish Cu-Fe arsenate.

Chenevixite Image

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Comments: Green micro crystals of chenevixite on matrix.
Location: Majuba Hill, Pershing County, Nevada, USA. Scale: Size Not Given.
© John Veevaert

Chenevixite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.8918:1:1.1031
Help on Cell Dimensions: Cell Dimensions: a = 15.006, b = 5.189, c = 5.724, Z = 2; beta = 102.25° V = 435.56 Den(Calc)= 4.59
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.56(1), 2.553(0.7), 3.82(0.5),

Physical Properties of Chenevixite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow green, Dark green, Olive green.
Help on Density: Density: 3.9
Help on Diaphaneity: Diaphaneity: Subtranslucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Compact - Occurs as a compact mass.
Help on Habit: Habit: Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: greenish yellow

Optical Properties of Chenevixite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.131 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.039 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2121,KPDmeas= 0.2496,KC= 0.2206
Ncalc = 1.86 - 2.01
Help on Optical Data: Optical Data: Biaxial (+), a=1.92, b=1.96, g=2.04, bire=0.1200

Calculated Properties of Chenevixite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.36 gm/cc
note: Specific Gravity of Chenevixite =4.59 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0040962054
Boson Index = 0.9959037946
Help on Photoelectric: Photoelectric: PEChenevixite = 32.02 barns/electron
U=PEChenevixite x rElectron Density= 139.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Chenevixite is Not Radioactive

Chenevixite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq � x(H2O)
  (42.07.10)Chenevixite Group Chenevixite Cu2Fe2(AsO4)2(OH)4•(H2O) P 21/m 2/m Luetheite Cu2Al2(AsO4)2(OH)4•(H2O) P 21/m 2/m
Help on  Strunz Class: Strunz Class: 08.DD.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DD -With only medium-sized cations, (OH, etc.):RO4 = 2:1
08.DD.05 Chenevixite Cu2Fe2(AsO4)2(OH)4•(H2O) P 21/m 2/m
08.DD.05 Luetheite Cu2Al2(AsO4)2(OH)4•(H2O) P 21/m 2/m

Other Chenevixite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Chenevixite :
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.DD.05





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