Agardite-(Dy) Mineral Data

General Agardite-(Dy) Information

Chemical Formula:

(Dy,La,Ca)Cu6(AsO4)3(OH)6•3(H2O)

Composition:

Molecular Weight = 1,083.41 gm

Calcium 0.37 % Ca 0.52 % CaO

Lanthanum 2.56 % La 3.01 % La₂O₃

Dysprosium 9.00 % Dy 10.33 % Dy₂O₃

Copper 35.19 % Cu 44.05 % CuO

Arsenic 20.75 % As 31.82 % As₂O₅

Hydrogen 1.12 % H 9.98 % H₂O

Oxygen 31.01 % O

______ ______

100.00 % 99.70 % = TOTAL OXIDE

Empirical Formula:

Dy_0.6La_0.2Ca_0.1Cu₆(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.

Name Pronunciation:

Agardite-(Dy)

Agardite-(Dy) Crystallography

Crystal System:

Hexagonal - Dipyramidal H-M Symbol (6/m)

Physical Properties of Agardite-(Dy)

Color:

Grass green.

Density:

3.72

Diaphaneity:

Transparent

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Agardite-(Dy)

Optical Data:

NCalc= 1.66 - from Gladstone-Dale relationship (KC = 0.1778) where Ncalc=Dmeas*KC+1

Calculated Properties of Agardite-(Dy)

Electron Density:

Bulk Density (Electron Density)=3.47 gm/cc
note: Specific Gravity of Agardite-(Dy) =3.72 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Agardite-(Dy)}= 111.61 barns/electron
U=PE_{Agardite-(Dy)} x r_electron= 387.81 barns/cc.

Radioactivity:

GRapi = 11,521.46 (Gamma Ray American Petroleum Institute Units)
Concentration of Agardite-(Dy) per GRapi unit = 86.79 (PPM)

Agardite-(Dy) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Agardite-(Dy)** - weak
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 8.01 cm	259,024	7.00E-06	11,521.46	3.79
100 gm / 3.72 cm	25,902	7.00E-07	1,152.15	0.38
10 gm / 1.73 cm	2,590	7.00E-08	115.21	0.04
1 gm / 8.01 mm	259	7.00E-09	11.52	0.00
0.1 gm / 3.72 mm	26	7.00E-10	1.15	0.00
0.01 gm / 1.73 mm	3	7.00E-11	0.12	0.00
0.001 gm / 0.80 mm	0	7.00E-12	0.01	0.00

Weight of pure Agardite-(Dy) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.72 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.58 % Th) From Sum REE Elements (11.56 % REE)

Agardite-(Dy) Classification

Dana Class:

42.05.01.02c (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-(Dy) Information

References:

NAME( Dana8)

See Also:

Links to other databases for Agardite-(Dy) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Agardite-(Dy)

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

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