Mineral Information and Data:

Agardite-(La)
Cu2+6La(AsO4)3(OH)6 • 3H2O [CNMNC approved formula]

Named for the composition and for Jules Agard, Geologist, Bureau de Recherches Geologiques et Minieres, Orleans, France.

IMA status : Approved Species 1980 (IMA1980-092)
CLASSIFICATION 
Dana
(8th edition) :
42.05.01.02a  (This Dana# Added)
  (42) Hydrated Phosphates Containing Hydroxyl or Halogen
  (42.05) where (A)2 (XO4) Zq · x(H2O)
  (42.05.01) Mixite group (Arsenate Series)
  
Nickel-Strunz
(10th edition) :
08.DL.15
  (08) Phosphates, Arsenates, Vanadates
  (08.D) Phosphates, etc
  (08.DL) With large and medium-sized cations, (OH, etc.):RO4 = 2:1
  
Crystal system: Hexagonal System
Point group (H-M): 6/m — dipyramidal
Unit cell: a = 13.586 Å, c = 5.931 Å
Crystal Habit: Acicular
  
Color: Grass-green to dull green, yellowish green to intense bluish green, rarely nearly colorless
Diaphaneity: Semitransparent
Luster: Vitreous
Hardness (Mohs): 3-4
Measured Density: 3.72 g/cm3
Tenacity: No data
Streak: Greenish white
  
Geologic Setting: In small amounts in the oxidized zone of hydrothermal mineralized breccia and polymetallic mineral deposits (Red Cloud mines, New Mexico, USA).
Mineral Association: Fluorite, bastnaesite, barite, quartz (Red Cloud fluorite mine, New Mexico, USA); chrysocolla, malachite, azurite, mimetite, vanadinite, conichalcite, wulfenite, mottramite, cerussite, quartz (Red Cloud copper mine, New Mexico, USA); smithsonite, aurichalcite, hydrozincite, azurite, cuprian adamite, calcite, chrysocolla, zincaluminite, gibbsite (Kamariza mine, Greece)
  

 

Agardite-(La)
8mm area of divergent acicular crystals groups on quartz
Origin: Sounion Mine #06 ("Exi" Mine), Agia Varvara Mines
(St Barbara Mines) , Sounion Area, Lavrion District,
Attikí (Attica; Attika) Prefecture, Greece
Photo and Owner: Steve Rust

 

Agardite-(La)
1mm area of agardite-La,
with prismatic malachite crystals in a quartz cavity.
Origin: Sounion Mine #06 ("Exi" Mine), Agia Varvara Mines
(St Barbara Mines) , Sounion Area, Lavrion District,
Attikí (Attica; Attika) Prefecture, Greece
Photo and Owner: Steve Rust

<<< BACK TO MINERAL SEARCH