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Agardite-(La) Mineral Data

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General Agardite-(La) Information

Help on Chemical  Formula: Chemical Formula: (La,Ca)Cu6(AsO4)3(OH)6•3(H2O)
Help on Composition: Composition: Molecular Weight = 1,068.32 gm
   Calcium     0.94 %  Ca    1.31 % CaO
   Lanthanum   9.75 %  La   11.44 % La2O3
   Copper     35.69 %  Cu   44.67 % CuO
   Arsenic    21.04 %  As   32.27 % As2O5
   Hydrogen    1.13 %  H    10.12 % H2O
   Oxygen     31.45 %  O
             ______        ______ 
             100.00 %       99.81 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La0.75Ca0.25Cu6(AsO4)3(OH)6•3(H2O)
Help on IMA Status: IMA Status: Approved IMA 1985 (Dana # Added)
Help on Locality: Locality: USA, NM, Lincoln Co, Red Cloud mn Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition and for Jules Agard, Geologist, Bureau de Recherches Geologiques et Minieres, Orleans, France.
Help on Name Pronunciation: Name Pronunciation: Agardite-(La) Say AGARDITE-(LA)

Agardite-(La) Image

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Comments: Blue-green acicular sprays of agardite-(La) in a gossanous matrix.
Location: Laurion, Greece. Scale: Specimen Size 4 cm.
© Adam Larson

Agardite-(La) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.43491
Help on Cell Dimensions: Cell Dimensions: a = 13.605, c = 5.917, Z = 2; V = 948.48 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): 11.7(1)(100), 2.45(0.4)(122), 3.56(0.27)(121),4.45(0.17)(120), 2.94(0.15)(400),

Physical Properties of Agardite-(La)

Help on Color: Color: Colorless, Yellowish green, Blue.
Help on Density: Density: 3.72
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: greenish white

Optical Properties of Agardite-(La)

Help on Optical Data: Optical Data: NCalc= 1.68 - from Gladstone-Dale relationship (KC = 0.1823) where Ncalc=Dcalc*KC+1
NCalc= 1.68 - from Gladstone-Dale relationship (KC = 0.1823) where Ncalc=Dmeas*KC+1

Calculated Properties of Agardite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.51 gm/cc
note: Specific Gravity of Agardite-(La) =3.74 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002530845
Boson Index = 0.9997469155
Help on Photoelectric: Photoelectric: PEAgardite-(La) = 75.43 barns/electron
U=PEAgardite-(La) x relectron= 264.47 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 9,751.15 (Gamma Ray American Petroleum Institute Units)
Concentration of Agardite-(La) per GRapi unit = 102.55 (PPM)

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

Estimated Radioactivity from Agardite-(La) - mild
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 7.99 cm 218,437 5.90E-06 9,751.15 3.21
100 gm / 3.71 cm 21,844 5.90E-07 975.11 0.32
10 gm / 1.72 cm 2,184 5.90E-08 97.51 0.03
1 gm / 7.99 mm 218 5.90E-09 9.75 0.00
0.1 gm / 3.71 mm 22 5.90E-10 0.98 0.00
0.01 gm / 1.72 mm 2 5.90E-11 0.10 0.00
0.001 gm / 0.80 mm 0 5.90E-12 0.01 0.00

Weight of pure Agardite-(La) 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 ( 0.49 % Th) From Sum REE Elements ( 9.75 % REE)

Agardite-(La) Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.05)where (A)2 (XO4) Zq � x(H2O)
  (42.05.01)Mixite group (Arsenate Series) Mixite BiCu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m Agardite-(Y) (Y,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m Agardite-(La)! (La,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m Agardite-(Nd)! (Pb,Nd,Y,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m Agardite-(Dy)! (Dy,La,Ca)Cu6(AsO4)3(OH)6•3(H2O) 6/m Agardite-(Ca)! CaCu6(AsO4)3(OH)6•3(H2O) 6/m Agardite-(Ce)! (Ce,Ca)Cu6(AsO4)3(OH)6•3(H2O) P 63/m 6/m Goudeyite (Al,Y)Cu6(AsO4)3(OH)6•3(H2O) Unk Hex Zalesiite! (Ca,Y)Cu6[(AsO4)2(AsO3OH)(OH)6]•3(H2O) P 63/m 6/m 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 Agardite-(La) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana, MinCryst)
Help on See Also: See Also: Links to other databases for Agardite-(La) :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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


Dana No: Strunz No: 08.DL.15





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