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Agardite-(Nd)

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Formula:
NdCu6(AsO4)3(OH)6 · 3H2O
System:
Hexagonal
Colour:
Grass-green, greenish, ...
Lustre:
Vitreous
Hardness:
3 - 4
Member of:
Originally an incompletely characterised member of the Mixite Group, published without approval.

Finally approved in 2010, based on material from the Hilarion Mine, Lavrion, Greece.

Quantitative analyses are generally needed to ensure that the Mixite-group sample in question is really Nd-dominant, and not simply a Nd-rich variety.

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


Classification of Agardite-(Nd)

Approved
Approval Year:
2010
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-(Nd)

Vitreous
Colour:
Grass-green, greenish, greenish-blue
Streak:
Greenish white
Hardness (Mohs):
3 - 4

Chemical Properties of Agardite-(Nd)

Formula:
NdCu6(AsO4)3(OH)6 · 3H2O
IMA Formula:
Cu62+Nd(AsO4)3(OH)6 · 3H2O
Elements listed in formula:

Crystallography of Agardite-(Nd)

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 13.548(8) Å, c = 5.894(6) Å
Ratio:
a:c = 1 : 0.435
Unit Cell Volume:
V 936.90 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
d-spacingIntensity
11.70 (100)
4.443 (22)
3.545 (18)
3.255 (8)
2.935 (18)
2.695 (13)
2.559 (10)
2.453 (30)

Type Occurrence of Agardite-(Nd)

Relationship of Agardite-(Nd) to other Species

Member of:
Other Members of Group:
Agardite-(Ce)CeCu6(AsO4)3(OH)6 · 3H2O
Agardite-(Dy)(Dy,La)Cu6(AsO4)3(OH)6 · 3H2O
Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2O
Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2O
CalciopetersiteCaCu6(PO4)2(PO3OH)(OH)6 · 3H2O
GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2O
MixiteBiCu6(AsO4)3(OH)6 · 3H2O
Petersite-(Ce)Cu6Ce(PO4)3(OH)6·3H2O
Petersite-(Y)(Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O
Plumboagardite(Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2O
ZálesíiteCaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O
8.DL.05FoggiteCaAl(PO4)(OH)2 · H2O
8.DL.10CyriloviteNaFe33+(PO4)2(OH)4 · 2H2O
8.DL.10Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2O
8.DL.10WarditeNaAl3(PO4)2(OH)4 · 2H2O
8.DL.15Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2O
8.DL.15Agardite-(Ce)CeCu6(AsO4)3(OH)6 · 3H2O
8.DL.15Agardite-(La)LaCu6(AsO4)3(OH)6 · 3H2O
8.DL.15GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2O
8.DL.15MixiteBiCu6(AsO4)3(OH)6 · 3H2O
8.DL.15Petersite-(Y)(Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O
8.DL.15ZálesíiteCaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O
8.DL.15Plumboagardite(Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2O
8.DL.15CalciopetersiteCaCu6(PO4)2(PO3OH)(OH)6 · 3H2O
8.DL.20CheremnykhitePb3Zn3(VO4)2(TeO6)
8.DL.20DugganitePb3Zn3(AsO4)2(TeO6)
8.DL.20KuksitePb3Zn3(PO4)2(TeO6)
8.DL.20WallkilldelliteCa2Mn32+(AsO4)2(OH)4 · 9H2O
8.DL.20Wallkilldellite-(Fe)(Ca,Cu)4Fe62+(AsO4,SiO4)4(OH,O)8 · 18H2O
8.DL.25AngastoniteCaMgAl2(PO4)2(OH)4 · 7H2O

Other Names for Agardite-(Nd)

Name in Other Languages:
Simplified Chinese:砷钕铜石
Traditional Chinese:砷釹銅石

Other Information

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

References for Agardite-(Nd)

Reference List:
Walenta, K., Theye, T. (2004) Agardit-(Ce) von der Grube Clara im mittleren Schwarzwald. Aufschluss: 55: 17-23. [includes data on Nd-dominant material from Johann Mine, Black Forest]

Pekov, I.V., Chukanov, N.V., Zadov, A.E., Voudouris, P., Magganas, A., Katerinopoulos, A. (2010) Agardite-(Nd), IMA 2010-056. CNMNC Newsletter No. 7, February 2010, page 30. Mineralogical Magazine: 75: 27-31.

Pekov, I.V., Chukanov, N.V., Zadov, A.E., Voudouris, P., Magganas, A., Katerinopoulos, A. (2011) Agardite-(Nd), NdCu6(AsO4)3(OH)6•3H2O from the Hilarion Mine, Lavrion, Greece: mineral description and chemical relations with other members of the agardite-zálesíite solid-solution system. Journal of Geosciences: 56: 249-255.

Internet Links for Agardite-(Nd)

mindat.org URL:
https://www.mindat.org/min-43.html
Please feel free to link to this page.

Localities for Agardite-(Nd)

This 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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
http://leme.anu.edu.au/Pubs/Advancesinregolith/Leverett_et_al.pdf
  • Western Australia
    • East Pilbara Shire
      • Rudall River District
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. Australian Journal of Mineralogy 12, 25-42.
Austria
 
  • Salzburg
    • Hohe Tauern
      • Gastein valley
        • Naßfeld valley
          • Kreuzkogel massif
            • Radhausberg
Kolitsch, U. (2014): 1876) Agardit-(Ce), Agardit-(Nd), Plumboagardit(?), Pseudomalachit und Zalesiit(?) vom Kielbreinbau, Radhausberg-Südseite, Gasteinertal, Salzburg. P. 112 in Niedermayr, G. et al. (2014): Neue Mineralfunde aus Österreich LXIII. Carinthia II, 204./124., 65-146. Kolitsch, U. (2015): Eine Korrektur zum Beitrag „Agardit-(Ce), Agardit-(Nd), Plumboagardit(?), Pseudomalachit und Zálesíit(?) vom Kielbreinbau, Radhausberg-Südseite, Gasteinertal, Salzburg“. P. 237 in Niedermayr, G. et al. (2015): Neue Mineralfunde aus Österreich LXIV. Carinthia II, 205./125., 207-280. [sample mix-up by finder]
  • Styria
    • Fischbacher Alpen
      • Rettenegg
        • Prinzkogel (Prinzenkogel)
          • Prinzkogel mines
            • Southern District
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993); Jakely, D. et al. (2008)
Bulgaria
 
  • Sofiya Oblast (Sofia Oblast)
Kunov, A. Y.; Nakov, R. A.; Stanchev, C. D. (2002): First agardite-(Y), -(Nd), -(La) find in Bulgaria. Neues Jahrbuch fuer Mineralogie, Monatshefte 2002, 107-116.
France
 
  • Auvergne-Rhône-Alpes
    • Rhône
      • Le Bois d'Oingt
        • Chessy-les-Mines
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
        • Wittichen
          • Burgfelsen
Walenta, K. and Theye, T. (2004): Agardit-(Ce) von der Grube Clara im mittleren Schwarzwald. Aufschluss 55, 17-23. [with analysis of Johann material showing Nd>La]
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
Greece (TL)
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
            • Hilarion area
Pekov, I.V., Chukanov, N.V., Zadov, A.E., Voudouris, P., Magganas, A. and Katerinopoulos, A. (2010) Agardite-(Nd), IMA 2010-056. CNMNC Newsletter No. 7, February 2010, page 30; Mineralogical Magazine, 75, 27-31.; Pekov, I.V., Chukanov, N.V., Zadov, A.E., Voudouris, P., Magganas, A., Katerinopoulos, A. (2011): Agardite-(Nd), NdCu6(AsO4)3(OH)6•3H2O from the Hilarion Mine, Lavrion, Greece: mineral description and chemical relations with other members of the agardite-zálesíite solid-solution system. Journal of Geosciences, 56, 249-255.
UK
 
  • England
    • Cornwall
      • St Erth - Gwithian Area
        • Hayle
          • Great Wheal Alfred (Alfred Consols)
Embrey, P.G. (1978) Fourth supplementary list of British Minerals. Mineralogical Magazine, vol. 42, n° 322, p. 169-177. Embrey & Symes (1987) Minerals of Cornwall and Devon.
USA
 
  • Nevada
    • Esmeralda Co.
      • Railroad Springs District
NBMG Spec. Pub. 31 Minerals of Nevada
Dakota Matrix - Tom Loomis
    • Mineral Co.
      • Bell District
NBMG Spec. Pub. 31 Minerals of Nevada
Mineral and/or Locality  
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