Euchroite Mineral Data

Euchroite Mineral Data
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General Euchroite Information

Help on Chemical Formula: Chemical Formula: Cu2(AsO4)(OH)•3(H2O)
Help on Composition: Composition: Molecular Weight = 337.06 gm
   Copper    37.71 %  Cu   47.20 % CuO
   Arsenic   22.23 %  As   34.09 % As2O5
   Hydrogen   2.09 %  H    18.71 % H2O
   Oxygen    37.97 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu2(AsO4)(OH)•3(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1823
Help on Locality: Locality: Libethen, Slovakia Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek eu - "good" and chros - "color."
Help on Name Pronunciation: Name Pronunciation: Euchroite + Pronunciation Say EUCHROITE
Help on Synonym: Synonym: ICSD 14322
  PDF 39-1358
 

Euchroite Image

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Euchroite

Comments: Dark green, blocky crystals of euchroite on matrix.
Location: Missoula County, Montana, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals
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Euchroite

Comments: Green, well developed, coarsely-crystalline euchroite on matrix.
Location: L'Ubietová (Libethen) Slovak Republic. Scale: 1.9 x 1.2 x 0.8 cm.
© Fabre Minerals

Euchroite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9572:1:0.5807
Help on Cell Dimensions: Cell Dimensions: a = 10.07, b = 10.52, c = 6.11, Z = 4; V = 647.27 Den(Calc)= 3.46
Help on Crystal System: Crystal System: Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 212121
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.34(1), 2.83(0.9), 7.37(0.8),
Help on Forms: Forms:

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Forms: ( 3 0 2) ( 2 0 1) ( 0 1 0) ( 1 0 1) ( 1 0 0) ( 1 1 0)

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Finney J J , Acta Crystallographica , 21 (1966) p.437-440, Refinement of the crystal structure of euchroite, Cu2(AsO4)(OH)*3H2O

 

Physical Properties of Euchroite

Help on Cleavage: Cleavage: {101} Imperfect, {110} Imperfect
Help on Color: Color: Leek green, Emerald green.
Help on Density: Density: 3.39 - 3.45, Average = 3.42
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: green
 

Optical Properties of Euchroite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.041 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2048,KPDmeas= 0.2072,KC= 0.1991
Ncalc = 1.67 - 1.69
Help on Optical Data: Optical Data: Biaxial (+), a=1.695, b=1.698, g=1.733, bire=0.0380, 2V(Calc)=34, 2V(Meas)=29. Dispersion relatively weak.
Help on Pleochroism (x): Pleochroism (x): none.
 

Calculated Properties of Euchroite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.33 gm/cc
note: Specific Gravity of Euchroite =3.46 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001854127
Boson Index = 0.9998145873
Help on Photoelectric: Photoelectric: PEEuchroite = 31.55 barns/electron
U=PEEuchroite x rElectron Density= 104.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Euchroite is Not Radioactive
 

Euchroite Classification
Help on Dana Class: Dana Class: 42.06.03.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.06)where (AB)2 (XO4) Zq · x(H2O)
  (42.06.03)Dana Group
 
42.06.03.01 Euchroite Cu2(AsO4)(OH)•3(H2O) P 212121 2 2 2
Help on Strunz Class: Strunz Class: 08.DC.07 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
 
08.DC.07 Euchroite Cu2(AsO4)(OH)•3(H2O) P 212121 2 2 2
 

Other Euchroite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Euchroite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Euchroite

Cu2(AsO4)(OH)•3(H2O)
Dana No: 42.06.03.01 Strunz No: 08.DC.07
Locality:

 

Notes: