Goudeyite Mineral Data

Advertisment

Updated weekly, for the collector, educator, and researcher since 1996. Extensive Inventory of very Rare Minerals. Visa and Mastercard are Welcome

General Goudeyite Information

Chemical Formula:

(Al,Y)Cu6(AsO4)3(OH)6•3(H2O)

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

Empirical Formula:

Al_0.7Y_0.3Cu₆(AsO₄)₃(OH)₆•3(H₂O)

Environment:

Al analog of agardite.

IMA Status:

Approved IMA 1978

Locality:

Majuba Hill mine, Pershing County, Nevada, USA. Link to MinDat.org Location Data.

Name Origin:

Named for Hatfield Goudey (1906-1985), mining geologist and mineral collector of San Mateo, California, USA.

Name Pronunciation:

Goudeyite + Pronunciation

Goudeyite Image

Images:

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

Axial Ratios:

a:c = 1:0.43809

Cell Dimensions:

a = 13.472, c = 5.902, Z = 2; V = 927.67 Den(Calc)= 3.58

Crystal System:

HexagonalSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 11.63(1), 2.92(0.5), 3.235(0.45),

Physical Properties of Goudeyite

Cleavage:

{100} Perfect, {001} Good

Color:

Colorless, Yellow green.

Density:

3.5

Diaphaneity:

Transparent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Goudeyite

Dichroism (e):

pale yellow green.

Dichroism (w):

green.

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

Optical Data:

Uniaxial (+), w=1.704, e=1.765, bire=0.0610.

Calculated Properties of Goudeyite

Electron Density:

Bulk Density (Electron Density)=3.39 gm/cc
note: Specific Gravity of Goudeyite =3.58 gm/cc.

Fermion Index:

Fermion Index = 0.0001631401
Boson Index = 0.9998368599

Photoelectric:

PE_Goudeyite= 35.69 barns/electron
U=PE_Goudeyite x rElectron Density= 121.11 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Goudeyite is Not Radioactive

Goudeyite Classification

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

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

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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

Search for Goudeyite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Goudeyite :

A Bijoux Google Search for Goudeyite
Adam's Minerals Google Search for Goudeyite
Cape Minerals Google Search for Goudeyite
Dakota Matrix Minerals Google Search for Goudeyite
Excalibur Mineral Corp. Google Search for Goudeyite
Exceptional Minerals Google Search for Goudeyite
John Betts Fine Minerals Search for Goudeyite
McDougall Minerals Google Search for Goudeyite
Mineral News Website Link
Rock and Mineral Shows Google Search for Goudeyite
Weinrich Minerals, Inc. Google Search for Goudeyite

Ask about Goudeyite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Goudeyite Specimen Label here :

Goudeyite

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

Notes: