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Goudeyite Mineral Data

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General Goudeyite Information

Help on Chemical  Formula: Chemical Formula: (Al,Y)Cu6(AsO4)3(OH)6•3(H2O)
Help on Composition: Composition: Molecular Weight = 999.68 gm
   Yttrium    2.67 %  Y     3.39 % Y2O3
   Aluminum   1.89 %  Al    3.57 % Al2O3
   Copper    38.14 %  Cu   47.74 % CuO
   Arsenic   22.48 %  As   34.49 % As2O5
   Hydrogen   1.21 %  H    10.81 % H2O
   Oxygen    33.61 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al0.7Y0.3Cu6(AsO4)3(OH)6•3(H2O)
Help on Environment: Environment: Al analog of agardite.
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 Hatfield Goudey (1906-1985), mining geologist and mineral collector of San Mateo, California, USA.
Help on Name Pronunciation: Name Pronunciation: Goudeyite + Pronunciation Say GOUDEYITE
 

Goudeyite Image

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  Goudeyite

Comments: Green crusts and micro crystals of goudeyite on matrix.
Location: Majuba Hill, Pershing County, Nevada, USA. Scale: Specimen size 1x3 cm.
© John Veevaert

Goudeyite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.43809
Help on Cell Dimensions: Cell Dimensions: a = 13.472, c = 5.902, Z = 2; V = 927.67 Den(Calc)= 3.58
Help on Crystal System: Crystal System: Hexagonal Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.63(1), 2.92(0.5), 3.235(0.45),
 

Physical Properties of Goudeyite

Help on Cleavage: Cleavage: {100} Perfect, {001} Good
Help on Color: Color: Colorless, Yellow green.
Help on Density: Density: 3.5
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: greenish white
 

Optical Properties of Goudeyite

Help on Dichroism (e): Dichroism (e): pale yellow green.
Help on Dichroism (w): Dichroism (w): green.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.123 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.097 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2052,KPDmeas= 0.2099,KC= 0.1869
Ncalc = 1.65 - 1.67
Help on Optical Data: Optical Data: Uniaxial (+), w=1.704, e=1.765, bire=0.0610.
 

Calculated Properties of Goudeyite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.39 gm/cc
note: Specific Gravity of Goudeyite =3.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001631401
Boson Index = 0.9998368599
Help on Photoelectric: Photoelectric: PEGoudeyite = 35.69 barns/electron
U=PEGoudeyite x rElectron Density= 121.11 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Goudeyite is Not Radioactive
 

Goudeyite Classification

Help on  Dana Class: Dana Class: 42.05.01.03 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.05)where (A)2 (XO4) Zq � x(H2O)
  (42.05.01)Mixite group (Arsenate Series)
 
42.05.01.01 Mixite BiCu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
 
42.05.01.02 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
 
42.05.01.02a Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
 
42.05.01.02b Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m
 
42.05.01.02c Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m
 
42.05.01.02d Agardite-(Ca)! CaCu6(AsO4)3(OH)6•3(H2O) 6/m
 
42.05.01.02e Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
 
42.05.01.03 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6•3(H2O) Unk Hex
 
42.05.01.04 Zalesiite! (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]•3(H2O) P 63/m 6/m
 
42.05.01.06 Plumboagardite! (Pb,REE,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
Help on  Strunz Class: Strunz Class: 08.DL.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DL -With large and medium-sized cations, (OH, etc.):RO4 = 2:1
 
08.DL.15 Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m
 
08.DL.15 Agardite-(Ca)! CaCu6(AsO4)3(OH)6•3(H2O) 6/m
 
08.DL.15 Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
 
08.DL.15 Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
 
08.DL.15 Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m
 
08.DL.15 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
 
08.DL.15 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6•3(H2O) Unk Hex
 
08.DL.15 Zalesiite! (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]•3(H2O) P 63/m 6/m
 
08.DL.15 Mixite BiCu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
 
08.DL.15 Petersite-(Y) (Y,Ce,Nd,Ca)Cu6(PO4)3(OH)6•3(H2O) P 63/m 6/m
 
08.DL.15 Calciopetersite! CaCu6[(PO4)2(PO3OH)(OH)6]•3(H2O) P 63/m 6/m
 
08.DL.15 Plumboagardite! (Pb,REE,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m
 

Other Goudeyite Information

Help on References: References: NAME( Dana8) 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 Goudeyite :
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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Goudeyite

(Al,Y)Cu6(AsO4)3(OH)6•3(H2O)
Dana No: 42.05.01.03 Strunz No: 08.DL.15
Locality:

 

Notes:

 

 
   
 


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