Mineralogy Database

Plumboagardite Mineral Data

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General Plumboagardite Information

Help on Chemical  Formula: Chemical Formula: (Pb,REE,Ca)Cu6(AsO4)3(OH)6•3(H2O)
Help on Composition: Composition: Molecular Weight = 1,097.39 gm
   Calcium         1.02 %  Ca    1.43 % CaO
   Lanthanum       1.65 %  La    1.93 % La2O3
   Cerium          0.77 %  Ce    0.90 % Ce2O3
   Praeseodymium   0.13 %  Pr    0.15 % Pr2O3
   Samarium        0.14 %  Sm    0.16 % Sm2O3
   Gadolinium      0.14 %  Gd    0.17 % Gd2O3
   Dysprosium      0.15 %  Dy    0.17 % Dy2O3
   Yttrium         0.73 %  Y     0.93 % Y2O3
   Iron            1.07 %  Fe    1.53 % Fe2O3
   Copper         32.37 %  Cu   40.52 % CuO
   Silicon         0.69 %  Si    1.48 % SiO2
   Arsenic        19.39 %  As   29.74 % As2O5
   Phosphorus      0.14 %  P     0.32 % P2O5
   Hydrogen        1.16 %  H    10.39 % H2O
   Lead            8.31 %  Pb    8.95 % PbO
   Neodymium       1.05 %  Nd    1.23 % Nd2O3
   Oxygen         31.10 %  O
                 ______        ______ 
                 100.00 %       99.99 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb0.44La0.13Nd0.08Ce0.06Pr0.01Sm0.01Gd0.01Dy0.01Y0.09Ca0.28Cu5.59Fe3+0.21As2.84Si0.27 P0.05O12(OH)6�3.33(H2O)
Help on Environment: Environment: Formed in an oxidized zone, the product of alteration of primary Pb, Cu, REE, and As minerals such as chalcopyrite, fluorite, fahlore, and galena. Mixite group.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Found in an abandoned mine, Aitern-S�d, near Sch�nau in the Southern Black Forest, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as Pb (plumbo) analogue of agardite.
Help on Synonym: Synonym: IMA2003-031a
 

Plumboagardite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.43137
Help on Cell Dimensions: Cell Dimensions: a = 13.77, c = 5.94, Z = 2; V = 975.41 Den(Calc)= 3.74
Help on Crystal System: Crystal System: Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 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),
 

Physical Properties of Plumboagardite

Help on Cleavage: Cleavage: None
Help on Color: Color: Grass green.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: greenish
 

Optical Properties of Plumboagardite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.112 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2047,KC= 0.184
Ncalc = 1.69
Help on Optical Data: Optical Data: Uniaxial (+), w=1.726, e=1.805, bire=0.0790.
 

Calculated Properties of Plumboagardite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.49 gm/cc
note: Specific Gravity of Plumboagardite =3.74 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEPlumboagardite = 186.95 barns/electron
U=PEPlumboagardite x relectron= 653.09 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,012.86 (Gamma Ray American Petroleum Institute Units)
Concentration of Plumboagardite per GRapi unit = 249.20 (PPM)

Plumboagardite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Plumboagardite - 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 / 7.99 cm 90,220 2.44E-06 4,012.86 1.32
100 gm / 3.71 cm 9,022 2.44E-07 401.29 0.13
10 gm / 1.72 cm 902 2.44E-08 40.13 0.01
1 gm / 7.99 mm 90 2.44E-09 4.01 0.00
0.1 gm / 3.71 mm 9 2.44E-10 0.40 0.00
0.01 gm / 1.72 mm 1 2.44E-11 0.04 0.00
0.001 gm / 0.80 mm 0 2.44E-12 0.00 0.00

Weight of pure Plumboagardite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.74 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 ( 0.20 % Th) From Sum REE Elements ( 4.02 % REE)
 

Plumboagardite Classification

Help on  Dana Class: Dana Class: 42.05.01.06 (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
Help on  Strunz Class: 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 Plumboagardite Information

Help on References: References: NAME( AmMin, v91, p713) PHYS. PROP.(AmMin, v91, p713) OPTIC PROP.(AmMin, v91, p713)
Help on See Also: See Also: Links to other databases for Plumboagardite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Plumboagardite Specimen Label here :

Plumboagardite

(Pb,REE,Ca)Cu6(AsO4)3(OH)6•3(H2O)
Dana No: 42.05.01.06 Strunz No: 08.DL.15
Locality:

 

Notes:

 

 
   
 


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