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Agardite-(Nd)

Formula:
(Nd,La,Ce)Cu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
System:HexagonalColour:Grass green
Hardness:3 - 4


Incompletely characterised member of the Mixite group. May in some cases not be a Nd-dominant mineral, but simply a Nd-rich variety.

Originally reported from Wittichen, Schenkenzell, Black Forest, Baden-Württemberg, Germany.

Classification of Agardite-(Nd)

IMA status:Rejected
Strunz 8th edition ID:7/D.53-70
Nickel-Strunz 10th (pending) edition ID: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
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Physical Properties of Agardite-(Nd)

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

Crystallography of Agardite-(Nd)

Crystal System:Hexagonal

Chemical Properties of Agardite-(Nd)

Formula:
(Nd,La,Ce)Cu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
Essential elements:As, Ca, Cu, H, O
All elements listed in formula:As, Ce, Cu, H, La, Nd, O

Relationship of Agardite-(Nd) to other Species

Member of Group:
Mixite Group:
Related Minerals - Nickel-Strunz Grouping):

- +
8.DL.05Foggite
CaAl[(OH)
 
2
|PO
 
4
] · H
 
2
O
8.DL.10Cyrilovite
NaFe
3+
3
[(OH)
 
2
|PO
 
4
]
 
2
· 2H
 
2
O
8.DL.10Millisite
(Na,K)CaAl
 
6
[(OH)
 
9
|(PO
 
4
)
 
4
] · 3H
 
2
O
8.DL.10Wardite
NaAl
 
3
[(OH)
 
2
|PO
 
4
]
 
2
· 2H
 
2
O
8.DL.15Agardite-(Y)
(Y,Ca)Cu
 
6
[(OH)
 
6
|(AsO
 
4
,HAsO
 
4
)|(AsO
 
4
)
 
2
] · 3H
 
2
O
8.DL.15Agardite-(Ce)
CeCu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Agardite-(La)
(La,Ce)Cu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Goudeyite
(Al,Y)Cu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Mixite
BiCu
 
6
[(OH)
 
6
|(AsO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Petersite-(Y)
(Y,Ce,Nd)Cu
 
6
[(OH)
 
6
|(PO
 
4
)
 
3
] · 3H
 
2
O
8.DL.15Zálesíite
(Ca,Y)Cu
 
6
[(OH)
 
6
|(HAsO
 
4
,AsO
 
4
)|(AsO
 
4
)
 
2
] · 3H
 
2
O
8.DL.15Plumboagardite
(Pb,REE,Ca)Cu
 
6
[(OH)
 
6
|(HAsO
 
4
,AsO
 
4
)|(AsO
 
4
)
 
2
] · 3H
 
2
O
8.DL.15Calciopetersite
CaCu
 
6
[(OH)
 
6
|HPO
 
4
|(PO
 
4
)
 
2
] · 3H
 
2
O
8.DL.20Cheremnykhite
Pb
 
3
Zn
 
3
TeO
 
6
(VO
 
4
)
 
2
8.DL.20Dugganite
Pb
 
3
Zn
 
3
(Te
6+
 
O
 
6
)(AsO
 
4
)
 
2
8.DL.20Kuksite
Pb
 
3
Zn
 
3
TeO
 
6
(PO
 
4
)
 
2
8.DL.20Wallkilldellite-(Mn)
Ca
 
2
Mn
2+
3
[(OH)
 
2
|AsO
 
4
]
 
2
· 9H
 
2
O
8.DL.20Wallkilldellite-(Fe)
(Ca,Cu)
 
4
Fe
2+
6
[(OH,O)
 
2
|(AsO
 
4
,SiO
 
4
)]
 
4
· 18H
 
2
O
8.DL.25Angastonite
CaMgAl
 
2
(PO
 
4
)
 
2
(OH)
 
4
·7H
 
2
O

Other Names for Agardite-(Nd)

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

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-(Nd)

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    Localities for Agardite-(Nd)

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (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.
    Australia
     
    • New South Wales
      • Robinson Co.
        • Cobar
          • Cobar
    http://leme.anu.edu.au/Pubs/Advancesinregolith/Leverett_et_al.pdf
    • Western Australia
    Downes, P. J., Hope, M., Bevan, A. W. R. and Henry, D. A. (2006): Chalcocite and associated secondary minerals from the Telfer gold mine, Western Australia. Austral. J. Mineral. 12, 25-42.
    Austria
     
    • Styria
      • Fischbacher Alpen Mts
        • Rettenegg
          • Prinzkogel (Prinzenkogel) Mt.
            • Prinzkogel Mt. mines
              • Southern District
    R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993); Jakely, D. et al. (2008)
    France
     
    • Rhône-Alpes
      • Rhône
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Bad Rippoldsau
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Gengenbach
          • Haigerach valley
    Wittern,A. (1995) Mineralien finden im Schwarzwald
        • Pforzheim
          • Würm
    Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Schenkenzell
    Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
            • Burgfelsen
    No reference listed
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • St Blasien
          • Urberg
    Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
    UK
     
    • England
      • Cornwall
        • St Erth - Gwithian Area
          • Phillack
    [Embrey & Symes, 1987, 40 - "Minerals of Cornwall and Devon"]
    USA
     
    • Nevada
      • Esmeralda Co.
        • Railroad Springs District
    NBMG Spec. Pub. 31 Minerals of Nevada
      • Mineral Co.
        • Bell District
    NBMG Spec. Pub. 31 Minerals of Nevada
    Mineral and/or Locality
    Google
     
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