Vote for your favorite mineral in #MinCup26! - Azurite vs. Smithsonite
It's carbonate-vs-carbonate to kick off Mineral Cup 2026 with copper-rich Azurite against zinc-rich Smithsonite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Agardite-(Dy)

This page is currently not sponsored. Click here to sponsor this page.
Formula:
(Dy,La)Cu6(AsO4)3(OH)6 · 3H2O
Colour:
Grass green
Lustre:
Vitreous
Hardness:
3 - 4
Crystal System:
Hexagonal
Incompletely characterised and highly questionable member of the Mixite Group.
A misinterpretation of chemical-analytical data seems highly probable - misidentified P-bearing agardite-(Y)?!

See also the highly questionable churchite-(Dy).




Hide all sections | Show all sections

Unique IdentifiersHide

Mindat ID:
49
Long-form identifier:
mindat:1:1:49:5

Similar NamesHide

AgarditeA synonym
Agardite-(Ca)A synonym of Zálesíite
Agardite-(Ce)A valid IMA mineral speciesCeCu6(AsO4)3(OH)6 · 3H2O
Agardite-(La)A valid IMA mineral speciesLaCu6(AsO4)3(OH)6 · 3H2O
Agardite-(Nd)A valid IMA mineral speciesNdCu6(AsO4)3(OH)6 · 3H2O
Agardite-(Y)A valid IMA mineral speciesYCu6(AsO4)3(OH)6 · 3H2O

IMA Classification of Agardite-(Dy)Hide

IMA status notes:
Published without approval

Classification of Agardite-(Dy)Hide

Strunz-mindat (2026):
8.DL.15

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1

Physical Properties of Agardite-(Dy)Hide

Lustre:
Vitreous
Colour:
Grass green
Streak:
Greenish white
Hardness:
3 - 4 on Mohs scale

Chemistry of Agardite-(Dy)Hide

Mindat Formula:
(Dy,La)Cu6(AsO4)3(OH)6 · 3H2O
Element Weights:
Element% weight
Cu34.145 %
O30.090 %
As20.129 %
Dy14.553 %
H1.083 %

Calculated from ideal end-member formula.
Elements listed:
As, Cu, Dy, H, La, O - search for minerals with similar chemistry

Crystallography of Agardite-(Dy)Hide

Crystal System:
Hexagonal

Other Language Names for Agardite-(Dy)Hide

Norwegian:Agarditt-(Dy)
Simplified Chinese:砷镝铜石
Traditional Chinese:砷鏑銅石

Related Minerals - Strunz-mindat GroupingHide

8.DL.05FoggiteCaAl(PO4)(OH)2 · H2OOrth. mmm(2/m2/m2/m)
8.DL.10FluorowarditeNaAl3(PO4)2F2(OH)2(H2O)2 Tet. 422 : P41212
8.DL.10WarditeNaAl3(PO4)2(OH)4 · 2H2OTet. 422 : P41212
8.DL.10Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2OTet.
8.DL.10CyriloviteNaFe3+3(PO4)2(OH)4 · 2H2OTet. 422 : P41212
8.DL.15Petersite-(Ce)CeCu6(PO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15Agardite-(Nd)NdCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15Agardite-(Ce)CeCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15Petersite-(Y)YCu6(PO4)3(OH)6 · 3H2OHex.
8.DL.15ZálesíiteCaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15MixiteBiCu6(AsO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15Petersite-(La)LaCu6(PO4)3(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2OHex.
8.DL.15CalciopetersiteCaCu6(PO4)2(PO3OH)(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.15PlumboagarditePbCu6(AsO4)2(AsO3OH)(OH)6 · 3H2OHex. 6/m : P63/m
8.DL.20DugganitePb3Zn3(AsO4)2(TeO6)Trig. 32 : P321
8.DL.20WallkilldelliteCa2Mn2+3(AsO4)2(OH)4 · 9H2OHex.
8.DL.20Wallkilldellite-(Fe)(Ca,Cu)4Fe2+6(AsO4,SiO4)4(OH,O)8 · 18H2OHex.
8.DL.20CheremnykhitePb3Zn3(VO4)2(TeO6)Orth.
8.DL.20KuksitePb3Zn3(PO4)2(TeO6)Trig. 32 : P321
8.DL.25AngastoniteCaMgAl2(PO4)2(OH)4 · 7H2OAmor.
8.DL.30LångbanshyttanitePb2Mn2Mg(AsO4)2(OH)4 · 6H2OTric. 1 : P1

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Agardite-(Dy)Hide

References for Agardite-(Dy)Hide

Quick NavTopUnique IdentifiersSimilar NamesIMA Classification Classification Physical Properties Chemistry Crystallography Other LanguagesStrunz-MindatOther InformationInternet Links References
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 1, 2026 07:35:16 Page updated: July 18, 2026 11:16:09
Go to top of page