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Agardite-(Dy)

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Formula:
(Dy,La)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
System:HexagonalColour:Grass green
Hardness:3 - 4
Member of:Mixite Group


Incompletely characterised 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).


Classification of Agardite-(Dy)

IMA status:Published without Approval
Strunz 8th edition ID:7/D.53-80

7 : Phosphates, Arsenates, Vanadates
D : Water-bearing phosphates with unfamiliar anions, mostly cations of small size: Be, Li
53 : Mixite - Agardite group
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Physical Properties of Agardite-(Dy)

Lustre:Vitreous
Colour:Grass green
Streak:Greenish white
Hardness (Mohs):3 - 4

Crystallography of Agardite-(Dy)

Crystal System:Hexagonal

Chemical Properties of Agardite-(Dy)

Formula:
(Dy,La)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
Essential elements:As, Cu, Dy, H, O
All elements listed in formula:As, Cu, Dy, H, La, O

Relationship of Agardite-(Dy) to other Species

Member of:Mixite Group
Other Members of Group:

- +
Agardite-(Ce)
CeCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
Agardite-(La)
(La,Ce)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
Agardite-(Nd)
NdCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
Agardite-(Y)
(Y,Ca)Cu
 
6
(AsO
 
4
)
 
2
(AsO
 
4
,HAsO
 
4
)(OH)
 
6
 · 3H
 
2
O
Calciopetersite
CaCu
 
6
(PO
 
4
)
 
2
(HPO
 
4
)(OH)
 
6
 · 3H
 
2
O
Goudeyite
(Al,Y)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
Mixite
BiCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
Petersite-(Y)
(Y,Ce,Nd)Cu
 
6
(PO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
Zálesíite
(Ca,Y)Cu
 
6
(AsO
 
4
)
 
2
(HAsO
 
4
,AsO
 
4
)(OH)
 
6
 · 3H
 
2
O
Related Minerals - Strunz Grouping):

- +
7/D.53-05Calciopetersite
CaCu
 
6
(PO
 
4
)
 
2
(HPO
 
4
)(OH)
 
6
 · 3H
 
2
O
7/D.53-10Petersite-(Y)
(Y,Ce,Nd)Cu
 
6
(PO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
7/D.53-20Goudeyite
(Al,Y)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
7/D.53-30Zálesíite
(Ca,Y)Cu
 
6
(AsO
 
4
)
 
2
(HAsO
 
4
,AsO
 
4
)(OH)
 
6
 · 3H
 
2
O
7/D.53-40Agardite-(Y)
(Y,Ca)Cu
 
6
(AsO
 
4
)
 
2
(AsO
 
4
,HAsO
 
4
)(OH)
 
6
 · 3H
 
2
O
7/D.53-50Agardite-(La)
(La,Ce)Cu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
7/D.53-60Agardite-(Ce)
CeCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
7/D.53-70Agardite-(Nd)
NdCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
7/D.53-85Plumboagardite
(Pb,REE,Ca)Cu
 
6
(AsO
 
4
)
 
2
(HAsO
 
4
,AsO
 
4
)(OH)
 
6
 · 3H
 
2
O
7/D.53-90Mixite
BiCu
 
6
(AsO
 
4
)
 
3
(OH)
 
6
 · 3H
 
2
O
7/D.53-95Juanitaite
Bi(Cu,Ca,Fe)
 
10
(AsO
 
4
)
 
4
(OH)
 
11
 · 2H
 
2
O
7/D.53-100Mrázekite
Bi
 
2
Cu
 
3
(PO
 
4
)
 
2
O
 
2
(OH)
 
2
 · H
 
2
O

Other Names for Agardite-(Dy)

Other Languages:
German:Agardit-(Dy)
Russian:Агардит-(Dy)

Other Information

Health Warning: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)

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    • Localities for Agardite-(Dy)

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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Schenkenzell
    		Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
            • Heubach Valley
    		No reference listed
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    Current server date and time: 21st Jan 2012 17:46:55
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