Goudeyite Mineral Data + Say GOUDEYITE

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.
 

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: HexagonalSpace 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 Diaphaniety: Diaphaniety: 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
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:

relectron=3.39 gm/cc
note: rGoudeyite =3.58 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00016
Boson Index = 0.99984
Help on Photoelectric: Photoelectric:

PEGoudeyite = 35.69 barns/electron
U=PEGoudeyite x relectron= 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: 42.5.1.3 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.5)where (A)2 (XO4) Zq · x(H2O)
  (42.5.1)Mixite group (Arsenate Series)
 
42.5.1.1 Mixite BiCu6(AsO4)3(OH)6·3(H2O) P 63/m 6/m
 
42.5.1.2 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 63/m 6/m
 
42.5.1.2a Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 63/m 6/m
 
42.5.1.2b Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m
 
42.5.1.2c Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m
 
42.5.1.2d Agardite-(Ca)! CaCu6(AsO4)3(OH)6·3(H2O) 6/m
 
42.5.1.2e Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 63/m 6/m
 
42.5.1.3 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6·3(H2O) Unk Hex
 
42.5.1.4 Zalesiite! (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]·3(H2O) P 63/m 6/m
 
42.5.1.6 IMA2003-031a! (Pb,REE,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 63/m 6/m
Help on  Strunz Class: Strunz Class: VII/D.53-20 VII - Phosphates, Arsenates and Vanadates
  VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K
  VII/D.53 - Mixite - Agardite group
 
VII/D.53-10 Petersite-(Y) (Y,Ce,Nd,Ca)Cu6(PO4)3(OH)6·3(H2O) P 63/m 6/m
 
VII/D.53-20 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6·3(H2O) Unk Hex
 
VII/D.53-30 Zalesiite! (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]·3(H2O) P 63/m 6/m
 
VII/D.53-40 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 63/m 6/m
 
VII/D.53-50 Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 63/m 6/m
 
VII/D.53-60 Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 63/m 6/m
 
VII/D.53-70 Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m
 
VII/D.53-80 Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m
 
VII/D.53-90 Mixite BiCu6(AsO4)3(OH)6·3(H2O) P 63/m 6/m
 
VII/D.53-95 Juanitaite! (Cu,Ca,Fe)10Bi(AsO4)4(OH)11·2(H2O) P 41/nnm 4/m 2/m 2/m
 
VII/D.53-100 Mrazekite Bi2Cu3(PO4)2O2(OH)2·2(H2O) P 21/n 2/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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Goudeyite

(Al,Y)Cu6(AsO4)3(OH)6·3(H2O)
Dana No: 42.5.1.3 Strunz No: VII/D.53-20
Locality:

 

Notes:

 

 
   
 
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