Agardite-(Y) Mineral Data

Advertisment

For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

General Agardite-(Y) Information

Chemical Formula:

(Y,Ca)Cu6(AsO4)3(OH)6•3(H2O)

Composition:

Molecular Weight = 1,030.82 gm

Calcium 0.97 % Ca 1.36 % CaO

Yttrium 6.47 % Y 8.21 % Y₂O₃

Copper 36.99 % Cu 46.30 % CuO

Arsenic 21.80 % As 33.45 % As₂O₅

Hydrogen 1.17 % H 10.49 % H₂O

Oxygen 32.59 % O

______ ______

100.00 % 99.81 % = TOTAL OXIDE

Empirical Formula:

Y_0.75Ca_0.25Cu₆(AsO₄)₃(OH)₆•3(H₂O)

IMA Status:

Approved IMA 1969

Locality:

Morocco, Bou Skour mine, Jebel Sarhro 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.

Name Pronunciation:

Agardite-(Y)

Synonym:

Chlorotile

ICSD 36476

PDF 25-183

Agardite-(Y) Image

Images:

Agardite-(Y)

Comments: Fibrous to fine acicular green micro crystals of agardite-(Y) (chlorotile) to 1mm.
Location: Clara mine, Wolfach, Schwarzwald, Baden-Württemberg, Germany. Scale: Picture size 0.5 cm.
© Tom Loomis / Dakota Matrix

Agardite-(Y) Crystallography

Axial Ratios:

a:c = 1:0.43321

Cell Dimensions:

a = 13.55, c = 5.87, Z = 2; V = 933.36 Den(Calc)= 3.67

Crystal System:

Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 6₃/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 10.73(1), 2.451(0.8), 2.938(0.8),

Physical Properties of Agardite-(Y)

Color:

Blue green, Blue.

Density:

3.66 - 3.72, Average = 3.69

Diaphaneity:

Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Agardite-(Y)

Dichroism (e):

colorless.

Dichroism (w):

colorless.

Gladstone-Dale:

CI meas= -0.084 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.09 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.202,KPDmeas= 0.2009,KC= 0.1854
Ncalc = 1.68 - 1.69

Optical Data:

Uniaxial (+), w=1.701, e=1.782, bire=0.0810.

Calculated Properties of Agardite-(Y)

Electron Density:

Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Agardite-(Y) =3.69 gm/cc.

Fermion Index:

Fermion Index = 0.0001713337
Boson Index = 0.9998286663

Photoelectric:

PE_Agardite-(Y)= 39.59 barns/electron
U=PE_Agardite-(Y) x rElectron Density= 138.11 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Agardite-(Y) is Not Radioactive

Agardite-(Y) Classification

Dana Class:

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

(42.05)where (A)2 (XO4) Zq · x(H2O)

(42.05.01)Mixite group (Arsenate Series)

42.05.01.01 Mixite BiCu6(AsO4)3(OH)6•3(H2O) P 6₃/m 6/m

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

42.05.01.02a Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 6₃/m 6/m

42.05.01.02b Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m

42.05.01.02c Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m

42.05.01.02d Agardite-(Ca)! CaCu6(AsO4)3(OH)6•3(H2O) 6/m

42.05.01.02e Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 6₃/m 6/m

42.05.01.03 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6•3(H2O) Unk Hex

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

42.05.01.06 Plumboagardite! (Pb,REE,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 6₃/m 6/m

Strunz Class:

08.DL.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DL -With large and medium-sized cations, (OH, etc.):RO4 = 2:1

08.DL.15 Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m

08.DL.15 Agardite-(Ca)! CaCu6(AsO4)3(OH)6•3(H2O) 6/m

08.DL.15 Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 6₃/m 6/m

08.DL.15 Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 6₃/m 6/m

08.DL.15 Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m

08.DL.15 Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 6₃/m 6/m

08.DL.15 Goudeyite (Al,Y)Cu6(AsO4)3(OH)6•3(H2O) Unk Hex

08.DL.15 Zalesiite! (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]•3(H2O) P 6₃/m 6/m

08.DL.15 Mixite BiCu6(AsO4)3(OH)6•3(H2O) P 6₃/m 6/m

08.DL.15 Petersite-(Y) (Y,Ce,Nd,Ca)Cu6(PO4)3(OH)6•3(H2O) P 6₃/m 6/m

08.DL.15 Calciopetersite! CaCu6[(PO4)2(PO3OH)(OH)6]•3(H2O) P 6₃/m 6/m

08.DL.15 Plumboagardite! (Pb,REE,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 6₃/m 6/m

Other Agardite-(Y) Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Agardite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

Search for Agardite-(Y) using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Agardite-(Y) :

A Bijoux Google Search for Agardite-(Y)
Adam's Minerals Google Search for Agardite-(Y)
Cape Minerals Google Search for Agardite-(Y)
Dakota Matrix Minerals Google Search for Agardite-(Y)
Excalibur Mineral Corp. Google Search for Agardite-(Y)
Exceptional Minerals Google Search for Agardite-(Y)
John Betts Fine Minerals Search for Agardite-(Y)
McDougall Minerals Google Search for Agardite-(Y)
Mineral News Website Link
Rock and Mineral Shows Google Search for Agardite-(Y)
Weinrich Minerals, Inc. Google Search for Agardite-(Y)

Ask about Agardite-(Y) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Agardite-(Y) Specimen Label here :

Agardite-(Y)

(Y,Ca)Cu6(AsO4)3(OH)6•3(H2O)
Dana No: 42.05.01.02 Strunz No: 08.DL.15
Locality:

Notes: