Agardite-(Ca) Mineral Data

Agardite-(Ca) Mineral Data +

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General Agardite-(Ca) Information

Chemical Formula:

CaCu6(AsO4)3(OH)6·3(H2O)

Composition:

Molecular Weight = 994.20 gm

Calcium 4.03 % Ca 5.64 % CaO

Copper 38.35 % Cu 48.01 % CuO

Arsenic 22.61 % As 34.68 % As₂O₅

Hydrogen 1.22 % H 10.87 % H₂O

Oxygen 33.79 % O

______ ______

100.00 % 99.20 % = TOTAL OXIDE

Empirical Formula:

CaCu₆(AsO₄)₃(OH)₆·3(H₂O)

IMA Status:

Not Approved IMA (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

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

Agardite-(Ca) Image

Images:

Agardite-(Ca)

Comments: Green, acicular sprays of agardite (agardite-Ca?) on matrix.
Location: Big Three mine, Silver Peak, Esmeralda County, Nevada, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Agardite-(Ca) Crystallography

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m)

Physical Properties of Agardite-(Ca)

Color:

Grass green, Light green.

Density:

3.72

Diaphaniety:

Transparent

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Agardite-(Ca)

Optical Data:

NCalc= 1.69 - from Gladstone-Dale relationship (KC = 0.1866) where Ncalc=Dmeas*KC+1

Calculated Properties of Agardite-(Ca)

Electron Density:

r_electron=3.54 gm/cc
note: r_{Agardite-(Ca)}=3.72 gm/cc.

Fermion Index

Fermion Index = 0.00021
Boson Index = 0.99979

Photoelectric:

PE_{Agardite-(Ca)}= 32.91 barns/electron
U=PE_{Agardite-(Ca)} x r_electron= 116.48 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Agardite-(Ca) is Not Radioactive

Agardite-(Ca) Classification

Dana Class:

42.5.1.2d (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.5)where (A)2 (XO4) Zq · x(H2O)

(42.5.1)Mixite group (Arsenate Series)

42.5.1.1 Mixite BiCu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

42.5.1.2 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

42.5.1.2a Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

42.5.1.2b Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m

42.5.1.2c Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6·3(H2O) 6/m

42.5.1.2d Agardite-(Ca) ! CaCu6(AsO4)3(OH)6·3(H2O) 6/m

42.5.1.2e Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

42.5.1.3 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6·3(H2O) Unk Hex

42.5.1.4 Zalesiite! (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]·3(H2O) P 6₃/m 6/m

42.5.1.6 IMA2003-031a! (Pb,REE,Ca)Cu6(AsO4)3(OH)6·3(H2O) P 6₃/m 6/m

Strunz Class:

VII/D.53-00 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K

VII/D.53 - Mixite - Agardite group

Other Agardite-(Ca) Information

References:

NAME( Dana8)

See Also:

Links to other databases for Agardite-(Ca) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas 10 -École des Mines de Paris

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Agardite-(Ca)

CaCu6(AsO4)3(OH)6·3(H2O)
Dana No: 42.5.1.2d Strunz No: VII/D.53-00
Locality:

Notes: