Where it forms, where it's found
- Type locality
- Majuba Hill Mine
- Antelope Mining District
- Pershing County
- Nevada
- USA
40.6692°, -118.4700°
22recorded occurrences
Safety & handling
Physical
- Hardness
- 1Talc
- 2Gypsum
- 3Calcite
- 4Fluorite
- 5Apatite
- 6Orthoclase
- 7Quartz
- 8Topaz
- 9Corundum
- 10Diamond
- Transparency
- Translucent
- Colour
- blue-green · yellow-green
- Streak
- greenish white
- Density
- 3.50 g/cm³
Optical
- Optical type
- Uniaxial (+)
- Refractive index
- 1.704 – 1.772
- Surface relief
- High
- Principal indices
- nω 1.704 – 1.705 · nε 1.765 – 1.772
- Pleochroism
- Weak
O = pale yellow-green; E = green.
Δ = 0Δmax
PPLpleochroism per grain
XPLindependent extinctions · rotate the stage
PPLpleochroism only · colour blends on rotation
XPLinterference colour · extinct every 90°
Retardation640 nm
Order2nd order
XPL colour
Crystallography
- Cell parameters
- a = 13.472(1) Å · c = 5.902(4) Å
- Z
- 2
- Type-locality form
hair-like crystals, encrusting fractures and as cross-fiber veinlets
- Comment
Point Group: 6/m or 6 (probable); Space Group: [P63/m or P63] (by analogy to mixite)
Chemical composition
Synonyms
- Goudeyiet
- IMA1978-015
In other languages
- French
- goudeyite
- German
- Goudeyit
- Spanish
- goudeyita
- Italian
- Goudeyite
- Chinese
- 三水砷铝铜石
Classification
Strunz
10th ed.8.DL.15
- 8Phosphates, Arsenates, VanadatesClass
- 8.DPhosphates, etc. with additional anions, with H2ODivision
- 8.DLWith large and medium-sized cations, (OH, etc.):RO4 = 2:1Group
- 8.DL.15GoudeyiteSpecies
Dana
8th ed.42.05.01.03
- 42Hydrated Phosphates, Etc.containing Hydroxyl or HalogenClass
- 42.05(AB)7(XO4)3Zq·xH2OType
- 42.05.01Mixite group (Arsenate Series)Group
- 42.05.01.03GoudeyiteSpecies
CIM
—20.4.15
- 20Arsenates (also arsenates with phosphate, but without other anions)Class
- 20.4Arsenates of Group III metals (Al, rare earths)Group
- 20.4.15GoudeyiteSpecies
Group, growth & confusion
Agardite-(Ce)CeCu2+6(AsO4)3(OH)6 · 3H2OMineral—- Agardite-(La)LaCu2+6(AsO4)3(OH)6 · 3H2OMineral—
- Agardite-(Nd)NdCu2+6(AsO4)3(OH)6 · 3H2OMineral—
Agardite-(Y)YCu2+6(AsO4)3(OH)6 · 3H2OMineral—
CalciopetersiteCaCu6(PO4)2(PO3OH)(OH)6 · 3H2OMineral—
MixiteCu6Bi(AsO4)3(OH)6 · 3H2OMineral—- Petersite-(Ce)Cu6Ce(PO4)3(OH)6 · 3H2OMineral—
- Petersite-(La)Cu6La(PO4)3(OH)6 · 3H2OMineral—
Petersite-(Y)Cu6Y(PO4)3(OH)6 · 3H2OMineral—
Plumboagardite(Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2OMineral—
Literature, links & citation
Citations
- 1978Wise, William S. (1978) Parnauite and goudeyite, two new copper arsenate minerals from the Majuba Hill Mine, Pershing County, Nevada. American Mineralogist, 63 (7-8) 704-708
- 1981Sarp, H., Bertrand, J., Deferne, J. (1981) Présence de Goudeyite, Cu6Al(AsO4)2(OH)6 · 3H2O, dans des échantillons provenant de l'ancienne mine de Chessy (Rhône, France). Schweizerische Mineralogische und Petrographische Mitteilungen: 61: 173-176.
- 2005(2005) Goudeyite. Handbook of Mineralogy. Mineralogical Society of America
- 2006Frost, Ray L., Weier, Matt, Martens, Wayde N. (2006) Raman microscopy of synthetic goudeyite (YCu6(AsO4)2(OH)6·3H2O) Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 63 (3) 685-689 doi:10.1016/j.saa.2005.06.019DOI: 10.1016/j.saa.2005.06.019
- 2018Golubev, Aleksandr, Brücher, Eva, Schulz, Armin, Kremer, Reinhard K., Schmidt, Franz X., Gordon, Elija E., Whangbo, Myung-Hwan (2018) Low-Dimensional Magnetic Properties of Natural and Synthetic Mixite (Bi,Ca)Cu6(OH)6(AsO4)3·nH2O (n ≈ 3) and Goudeyite YCu6(OH)6(AsO4)3·nH2O (n ≈ 3). Zeitschrift für anorganische und allgemeine Chemie, 644. 1782-1790 doi:10.1002/zaac.201800344DOI: 10.1002/zaac.201800344
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Goudeyite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/goudeyite-1732},
note = {Accessed 2026-05-11}
}