IMA2003-031a Mineral Data

IMA2003-031a Mineral Data

General IMA2003-031a Information

Chemical Formula:

(Pb,REE,Ca)Cu6(AsO4)3(OH)6·3(H2O)

Composition:

Molecular Weight = 1,125.65 gm

Calcium 0.36 % Ca 0.50 % CaO

La,Ce,Pr,Nd,Sm, 3.84 % RE 4.48 % REE₂O₃

Copper 33.87 % Cu 42.40 % CuO

Arsenic 19.97 % As 30.63 % As₂O₅

Hydrogen 1.07 % H 9.60 % H₂O

Lead 11.04 % Pb 11.90 % PbO

Oxygen 29.85 % O

______ ______

100.00 % 99.50 % = TOTAL OXIDE

Empirical Formula:

Pb_0.6REE_0.3Ca_0.1Cu₆(AsO₄)₃(OH)₆·3(H₂O)

Environment:

Mixite group

IMA Status:

Proposed IMA 2004 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

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IMA2003-031a Crystallography

Axial Ratios:

a:c = 1:0.43137

Cell Dimensions:

a = 13.77, c = 5.94, Z = 2; V = 975.41 Den(Calc)= 3.83

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): 12.01(1), 3.6(0.8), 2.49(0.7),2.98(0.6), 4.51(0.6), 1.817(0.5), 2.61(0.5), 2.74(0.5), 3.31(0.5),

Optical Properties of IMA2003-031a

Optical Data:

NCalc= 1.68 - from Gladstone-Dale relationship (KC = 0.1771) where Ncalc=Dcalc*KC+1

Calculated Properties of IMA2003-031a

Electron Density:

r_electron=3.56 gm/cc
note: r_IMA2003-031a=3.83 gm/cc.

Fermion Index

Fermion Index = 0.03169
Boson Index = 0.96831

Photoelectric:

PE_IMA2003-031a= 235.41 barns/electron
U=PE_IMA2003-031a x r_electron= 837.02 barns/cc.

Radioactivity:

GRapi = 3,813.98 (Gamma Ray American Petroleum Institute Units)

IMA2003-031a is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from IMA2003-031a** - mild
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 / 7.93 cm	86,275	2.33E-06	3,813.98	1.25
100 gm / 3.68 cm	8,628	2.33E-07	381.40	0.13
10 gm / 1.71 cm	863	2.33E-08	38.14	0.01
1 gm / 7.93 mm	86	2.33E-09	3.81	0.00
0.1 gm / 3.68 mm	9	2.33E-10	0.38	0.00
0.01 gm / 1.71 mm	1	2.33E-11	0.04	0.00
0.001 gm / 0.79 mm	0	2.33E-12	0.00	0.00

Weight of pure IMA2003-031a in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.83 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 ( 0.19 % Th) From Sum REE Elements ( 3.84 % REE)

IMA2003-031a Classification

Dana Class:

42.5.1.6 (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/X.00-00 VII - Phosphates, Arsenates and Vanadates

VII/X - Unclassified Strunz Phosphates, Arsenates and Vanadates

VII/X.00 - Mixite group

Other IMA2003-031a Information

See Also:

Links to other databases for IMA2003-031a :
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)

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IMA2003-031a

(Pb,REE,Ca)Cu6(AsO4)3(OH)6·3(H2O)
Dana No: 42.5.1.6 Strunz No: VII/X.00-00
Locality:

Notes: