Agardite-(La)
This page is currently not sponsored. Click here to sponsor this page.
Formula:
LaCu6(AsO4)3(OH)6 · 3H2O
Colour:
Grass-green to dull green, yellowish green to intense bluish green, rarely nearly colourless.
Lustre:
Sub-Vitreous, Resinous, Waxy
Hardness:
3 - 4
Specific Gravity:
3.65
Crystal System:
Hexagonal
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
7/D.53-50
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
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)
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
Transparency:
Transparent, Translucent
Colour:
Grass-green to dull green, yellowish green to intense bluish green, rarely nearly colourless.
Streak:
greenish white
Hardness:
3 - 4 on Mohs scale
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:
Cu2+6La(AsO4)3(OH)6 · 3H2O
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 V:
948.07 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals acicular, prismatic, to 3 mm, in tufted groups, spherical rosettes.
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:
Synonyms of Agardite-(La)
Other Language Names for Agardite-(La)
Relationship of Agardite-(La) to other Species
Member of:
Other Members of this group:
Agardite-(Ce) | CeCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
Agardite-(Dy) | (Dy,La)Cu6(AsO4)3(OH)6 · 3H2O | Hex. |
Agardite-(Nd) | NdCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
Agardite-(Y) | YCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
Calciopetersite | CaCu6(PO4)2(PO3OH)(OH)6 · 3H2O | Hex. 6/m : P63/m |
Goudeyite | AlCu6(AsO4)3(OH)6 · 3H2O | Hex. |
Mixite | BiCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
Petersite-(Ce) | Cu6Ce(PO4)3(OH)6·3H2O | Hex. 6/m : P63/m |
Petersite-(La) | Cu6La(PO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
Petersite-(Y) | (Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O | Hex. |
Plumboagardite | (Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
Zálesíite | CaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O | Hex. |
Common Associates
Aurichalcite | (Zn,Cu)5(CO3)2(OH)6 |
Azurite | Cu3(CO3)2(OH)2 |
Baryte | BaSO4 |
Bastnäsite | Name used for F-dominant members of the Bastnäsite Group for which the dominant REE element is not known. |
Calcite | CaCO3 |
Cerussite | PbCO3 |
Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O |
Conichalcite | CaCu(AsO4)(OH) |
Cuprian Adamite | (Zn,Cu)2AsO4OH |
Fluorite | CaF2 |
Gibbsite | Al(OH)3 |
Hydrozincite | Zn5(CO3)2(OH)6 |
Malachite | Cu2(CO3)(OH)2 |
Mimetite | Pb5(AsO4)3Cl |
Mottramite | PbCu(VO4)(OH) |
Quartz | SiO2 |
Smithsonite | ZnCO3 |
Vanadinite | Pb5(VO4)3Cl |
Wulfenite | Pb(MoO4) |
Zincaluminite | Zn6Al6(SO4)2(OH)16 · 5H2O |
Associated Minerals Based on Photo Data:
Cornwallite | 8 photos of Agardite-(La) associated with Cornwallite on mindat.org. |
Bayldonite | 8 photos of Agardite-(La) associated with Bayldonite on mindat.org. |
Adamite | 7 photos of Agardite-(La) associated with Adamite on mindat.org. |
Malachite | 5 photos of Agardite-(La) associated with Malachite on mindat.org. |
Azurite | 5 photos of Agardite-(La) associated with Azurite on mindat.org. |
Duftite | 4 photos of Agardite-(La) associated with Duftite on mindat.org. |
Pseudomalachite | 3 photos of Agardite-(La) associated with Pseudomalachite on mindat.org. |
Conichalcite | 2 photos of Agardite-(La) associated with Conichalcite on mindat.org. |
Baryte | 2 photos of Agardite-(La) associated with Baryte on mindat.org. |
Goethite | 2 photos of Agardite-(La) associated with Goethite on mindat.org. |
Related Minerals - Nickel-Strunz Grouping
8.DL.05 | Foggite | CaAl(PO4)(OH)2 · H2O | Orth. |
8.DL.10 | Cyrilovite | NaFe3+3(PO4)2(OH)4 · 2H2O | Tet. 4 2 2 : P41 21 2 |
8.DL.10 | Millisite | (Na,K)CaAl6(PO4)4(OH)9 · 3H2O | Tet. |
8.DL.10 | Wardite | NaAl3(PO4)2(OH)4 · 2H2O | Tet. 4 2 2 : P41 21 2 |
8.DL.15 | Agardite-(Nd) | NdCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
8.DL.15 | Agardite-(Y) | YCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
8.DL.15 | Agardite-(Ce) | CeCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
8.DL.15 | Goudeyite | AlCu6(AsO4)3(OH)6 · 3H2O | Hex. |
8.DL.15 | Mixite | BiCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
8.DL.15 | Petersite-(Y) | (Y,Ce,Nd)Cu6(PO4)3(OH)6 · 3H2O | Hex. |
8.DL.15 | Zálesíite | CaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O | Hex. |
8.DL.15 | Plumboagardite | (Pb,REE,Ca)Cu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
8.DL.15 | Calciopetersite | CaCu6(PO4)2(PO3OH)(OH)6 · 3H2O | Hex. 6/m : P63/m |
8.DL.20 | Cheremnykhite | Pb3Zn3(VO4)2(TeO6) | Orth. |
8.DL.20 | Dugganite | Pb3Zn3(AsO4)2(TeO6) | Trig. 3 2 : P3 2 1 |
8.DL.20 | Kuksite | Pb3Zn3(PO4)2(TeO6) | Trig. 3 2 : P3 2 1 |
8.DL.20 | Wallkilldellite | Ca2Mn2+3(AsO4)2(OH)4 · 9H2O | Hex. |
8.DL.20 | Wallkilldellite-(Fe) | (Ca,Cu)4Fe2+6(AsO4,SiO4)4(OH,O)8 · 18H2O | Hex. |
8.DL.25 | Angastonite | CaMgAl2(PO4)2(OH)4 · 7H2O | Tric. 1 : P1 |
Related Minerals - Hey's Chemical Index of Minerals Grouping
20.4.1 | Mansfieldite | AlAsO4 · 2H2O | Orth. mmm (2/m 2/m 2/m) : Pbca |
20.4.2 | Bulachite | Al2(AsO4)(OH)3 · 3H2O | Orth. |
20.4.3 | Pharmacoalumite | KAl4(AsO4)3(OH)4 · 6.5H2O | Iso. 4 3m : P4 3m |
20.4.4 | Luetheite | Cu2Al2(AsO4)2(OH)4 | Mon. 2/m : P21/m |
20.4.5 | Arsenogoyazite | SrAl3(AsO4)(AsO3OH)(OH)6 | Trig. 3m (3 2/m) : R3m |
20.4.6 | Arsenocrandallite | CaAl3(AsO4)(AsO3OH)(OH)6 | Trig. 3m (3 2/m) |
20.4.7 | Arsenoflorencite-(Ce) | CeAl3(AsO4)2(OH)6 | Trig. 3m (3 2/m) : R3m |
20.4.8 | Arsenoflorencite-(La) | LaAl3(AsO4)2(OH)6 | Trig. 3m (3 2/m) : R3m |
20.4.9 | Arsenoflorencite-(Nd) | NdAl3(AsO4)2(OH)6 | Trig. |
20.4.10 | Gerdtremmelite | (Zn,Fe)(Al,Fe)2(AsO4)(OH)5 | Tric. |
20.4.11 | Gasparite-(Ce) | Ce(AsO4) | |
20.4.12 | Chernovite-(Y) | Y(AsO4) | Tet. 4/mmm (4/m 2/m 2/m) : I41/amd |
20.4.13 | Agardite-(Y) | YCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
20.4.15 | Goudeyite | AlCu6(AsO4)3(OH)6 · 3H2O | Hex. |
20.4.16 | Retzian-(Ce) | Mn2+2Ce(AsO4)(OH)4 | Orth. mmm (2/m 2/m 2/m) : Pban |
20.4.17 | Retzian-(La) | (Mn2+,Mg)2(La,Ce,Nd)(AsO4)(OH)4 | Orth. mmm (2/m 2/m 2/m) : Pban |
20.4.18 | Retzian-(Nd) | Mn2+2(Nd,Ce,La)(AsO4)(OH)4 | Orth. mmm (2/m 2/m 2/m) : Pban |
Fluorescence of Agardite-(La)
Not fluorescent
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:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Agardite-(La)
Locality List




All localities listed without proper references should be considered as questionable.
Austria | |
| 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 | |
| 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 | |
| Hohl: "Minéraux et Mines du Massif Vosgien", Editions du Rhin (Mulhouse), 1994 |
| N. Meisser2001 and 2002 Analysis |
| - 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 | |
| Jean Claude Dol |
Germany | |
| Gröbner, J. (2017): Zálesíit von Oberhepschingen im Wiesental, Südschwarzwald, sowie ein aktueller Überblick über Agarditvorkommen im Schwarzwald. Erzgräber 31 (1), 1-9. |
| Gröbner, J. (2017): Zálesíit von Oberhepschingen im Wiesental, Südschwarzwald, sowie ein aktueller Überblick über Agarditvorkommen im Schwarzwald. Erzgräber 31 (1), 1-9.; 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. |
| Wittern: "Mineralfundorte in Deutschland", Schweizerbart (Stuttgart), 2001 |
| Gröbner, J. (2017): Zálesíit von Oberhepschingen im Wiesental, Südschwarzwald, sowie ein aktueller Überblick über Agarditvorkommen im Schwarzwald. Erzgräber 31 (1), 1-9. |
| Gröbner, J. (2017): Zálesíit von Oberhepschingen im Wiesental, Südschwarzwald, sowie ein aktueller Überblick über Agarditvorkommen im Schwarzwald. Erzgräber 31 (1), 1-9. |
| Handbook of Mineralogy |
| Weiss: "Mineralfundstellen, Deutschland West", 1990 |
| No reference listed |
Greece | |
| LAPIS 24 (7/8) 1999; Wendel, W. and Markl, G. (1999) Lavrion: Mineralogische Klassiker und Raritäten für Sammler. LAPIS 24 (7/8):34-52 |
| 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. | |
| Hanke, H. (1998): Laurion - ein Rückblick auf die Funde der letzten drei Jahre. Mineralien-Welt, 9 (2), 37-45. |
| |
Italy | |
| Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000 |
| 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 | |
| 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 | |
| Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 24 |
UK | |
| Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000 |
| Betterton, J. (2000) Famous Mineral Localities: Penberthy Croft Mine, St. Hilary, Cornwall, England. UK Journal of Mines & Minerals, 20, 7-37 |
| Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000 |
| Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000 |
USA | |
| www.mineralsocal.org |
| Anthony, Bideaux, Bladh, Nichols: "Handbook of Mineralogy", Vol. 4, 2000 |
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols |
Serpieri Mine, Kamariza Mines, Agios Konstantinos [St Constantine], Lavrion District Mines, Lavrion District, Attikí Prefecture, Greece