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Agardite-(La)

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Formula:
LaCu6(AsO4)3(OH)6 · 3H2O
System:
Hexagonal
Colour:
Grass-green to dull ...
Lustre:
Sub-Vitreous, Resinous, Waxy
Hardness:
3 - 4
Member of:
Name:
Named by Peter J. Modreski in 1983 for its relationship to the other Agardite series minerals.

Classification of Agardite-(La)

Approved
Approval Year:
1980
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
20.4.14

20 : Arsenates (also arsenates with phosphate, but without other anions)
4 : Arsenates of Group III metals (Al, rare earths)

Physical Properties of Agardite-(La)

Sub-Vitreous, Resinous, Waxy
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Grass-green to dull green, yellowish green to intense bluish green, rarely nearly colourless.
Streak:
greenish white
Hardness (Mohs):
3 - 4
Tenacity:
Brittle
Density:
3.65 g/cm3 (Measured)    3.62 g/cm3 (Calculated)

Optical Data of Agardite-(La)

Type:
Uniaxial
Pleochroism:
Non-pleochroic

Chemical Properties of Agardite-(La)

Formula:
LaCu6(AsO4)3(OH)6 · 3H2O
IMA Formula:
Cu62+La(AsO4)3(OH)6 · 3H2O
Elements listed in formula:

Crystallography of Agardite-(La)

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Cell Parameters:
a = 13.586 Å, c = 5.931 Å
Ratio:
a:c = 1 : 0.437
Unit Cell Volume:
V 948.07 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals acicular, prismatic, to 3 mm, in tufted groups, spherical rosettes.

Occurrences of Agardite-(La)

Type Occurrence of Agardite-(La)

Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 148987, 148988.
Geological Setting of Type Material:
Fluorite mine
Associated Minerals at Type Locality:

Relationship of Agardite-(La) 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-(Nd)NdCu6(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-(Nd)NdCu6(AsO4)3(OH)6 · 3H2O
8.DL.15Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2O
8.DL.15Agardite-(Ce)CeCu6(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
20.4.1MansfielditeAlAsO4 · 2H2O
20.4.2BulachiteAl2(AsO4)(OH)3 · 3H2O
20.4.3PharmacoalumiteKAl4(AsO4)3(OH)4 · 6.5H2O
20.4.4LuetheiteCu2Al2(AsO4)2(OH)4
20.4.5ArsenogoyaziteSrAl3(AsO4)(AsO3OH)(OH)6
20.4.6ArsenocrandalliteCaAl3(AsO4)(AsO3OH)(OH)6
20.4.7Arsenoflorencite-(Ce)CeAl3(AsO4)2(OH)6
20.4.8Arsenoflorencite-(La)LaAl3(AsO4)2(OH)6
20.4.9Arsenoflorencite-(Nd)NdAl3(AsO4)2(OH)6
20.4.10Gerdtremmelite(Zn,Fe)(Al,Fe)2(AsO4)(OH)5
20.4.11Gasparite-(Ce)Ce(AsO4)
20.4.12Chernovite-(Y)Y(AsO4)
20.4.13Agardite-(Y)YCu6(AsO4)3(OH)6 · 3H2O
20.4.15GoudeyiteAlCu6(AsO4)3(OH)6 · 3H2O
20.4.16Retzian-(Ce)Mn22+Ce(AsO4)(OH)4
20.4.17Retzian-(La)(Mn2+,Mg)2(La,Ce,Nd)(AsO4)(OH)4
20.4.18Retzian-(Nd)Mn22+(Nd,Ce,La)(AsO4)(OH)4

Other Names for Agardite-(La)

Name in Other Languages:
Simplified Chinese:砷镧铜石
Traditional Chinese:砷鑭銅石

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-(La)

Reference List:
Modresky, P.J. (1983) Agardite-(La), a Chemically Complex Rare-Earth Arsenate from the Gallinas District, Lincoln Co., New Mexico. In Anthony, J. W., (editor), Oxidation Mineralogy of Base Metal Deposits, Fifth Joint Mineralogical Society of America - Friends of Mineralogy Symposium.

Fehr, T., Hochleitner, R. (1984) Agardit-La: Ein neues Mineral von Lavrion, Griechenland. Lapis: 1: 22,37. [in German]

Dunn, P.J., Fleischer, M., Langley, R.H., Shigley, J.E., Zilczer, J.A. (1985) New mineral names. American Mineralogist: 70: 871-881.

Internet Links for Agardite-(La)

mindat.org URL:
https://www.mindat.org/min-50.html
Please feel free to link to this page.

Localities for Agardite-(La)

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.
Austria
 
  • Carinthia
    • Gurktaler Alpen
      • St Veit an der Glan
        • Äußere Wimitz
Kolitsch, U., Blaß, G. & Auer, C. (2010): 1618) Bleihaltiger Agardit-(La) und Brookit von der Äußeren Wimitz, St. Veit an der Glan, Gurktaler Alpen. P. 203 in Niedermayr et al. (2010): Neue Mineralfunde aus Österreich LIX. Carinthia II, 200./120., 199-260.
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
 
  • Bourgogne-Franche-Comté
    • Territoire-de-Belfort
      • Giromagny
Hohl: "Minéraux et Mines du Massif Vosgien", Editions du Rhin (Mulhouse), 1994
  • Grand Est
    • Bas-Rhin
      • Villé Valley
        • Urbeis
N. Meisser2001 and 2002 Analysis
  • Occitanie
    • Aveyron
      • Monteils
- Favreau G., Eytier J-R., Eytier C. (2010), Les minéraux de la mine de Falgayrolles (Aveyron), Le Cahier des Micromonteurs, n°109
Patrice Queneau Collection
      • Najac
Jean Claude Dol
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Feldberg area
Brill, A. R. & Bär, W. (2017): Reevesit von der ehemaligen Grube Rotenbach am Feldberg, ein neues Mineral aus dem Schwarzwald. Mineralien-Welt, 28(1), 62-64.
      • Freudenstadt
Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001
      • Wolfach
        • Oberwolfach
          • Rankach valley
Handbook of Mineralogy
  • Lower Saxony
    • Harz
      • St Andreasberg District
        • Oder valley
Weiss: "Mineralfundstellen, Deutschland West", 1990
        • St Andreasberg
No reference listed
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District Mines
        • Agios Konstantinos [St Constantine] (Kamariza)
LAPIS 24 (7/8) 1999; Wendel, W. and Markl, G. (1999) Lavrion: Mineralogische Klassiker und Raritäten für Sammler. LAPIS 24 (7/8):34-52
          • Kamariza Mines (Kamareza Mines)
Elbin, K. & Wendel, W. (1996): Lavendulan aus Lavrion. Lapis, 21 (11), 42-43; 62. ; Hanke, H. (1998): Laurion - ein Rückblick auf die Funde der letzten drei Jahre. Mineralien-Welt, 9 (2), 37-45.; J. Gröbner und U. Kolitsch (2002): Neufunde von Laurion aus den Jahren 2001 und 2002. Aufschluss 53 (5-6), 363-371.
GRÖBNER, J. (2001): Roter Skorodit und weitere ungewöhnliche Arsenate: Die Mineralien des Abbaus 132 der Grube Christiana, Lavrion/Griechenland. Lapis, 26 (11), 13-21.
            • Hilarion area
Hanke, H. (1998): Laurion - ein Rückblick auf die Funde der letzten drei Jahre. Mineralien-Welt, 9 (2), 37-45.
        • Sounion Area
          • Agia Varvara Mines (St Barbara Mines)
Italy
 
  • Sardinia
    • Carbonia-Iglesias Province
      • Domusnovas
        • Oridda
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Valsugana
        • Novaledo
Rocchetti I., Gentile P. and Ferretti P. (2012): La Miniera di Frattasecca presso Malga Broi (Novaledo, Trentino-Alto Adige). Storia e nuove segnalazioni mineralogiche. Studi Trentini di Scienze Naturali, 92, pagg. 167-180.
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Rudawy Janowickie Mts
      • Jelenia Góra District
SiudaR., K. Gal-Solymos, Kruszewski L., 2006: Agardite-(La)-duftite and scorodite-köttigite-like mineral paragenesis from supergenic zone of the Miedzianka deposit (Rudawy Janowickie Mts., Poland) – preliminary report. Mineralogia Polonica Special Papers, 29, 192-195
Switzerland
 
  • Ticino (Tessin)
    • Malcantone
      • Alto Malcantone
        • Breno
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 24
UK
 
  • England
    • Cornwall
      • Mount's Bay District
        • St Hilary
Betterton, J. (2000) Famous Mineral Localities: Penberthy Croft Mine, St. Hilary, Cornwall, England. UK Journal of Mines & Minerals, 20, 7-37
      • St Erth - Gwithian Area
        • Hayle
          • Great Wheal Alfred (Alfred Consols)
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000
    • Cumbria
      • Caldbeck Fells
        • Carrock Fell
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000
        • Deer Hills
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000
USA
 
  • California
    • San Benito Co.
      • Diablo Range
        • New Idria District
          • San Benito River headwaters area
            • Dallas Gem Mine area
              • Santa Rita Peak
www.mineralsocal.org
  • New Mexico
    • Lincoln Co.
      • Red Cloud District
        • Gallinas Mts
Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
Mineral and/or Locality  
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