Agardite-(La) Mineral Data

[Mineral Galleries] [About Me] [e-Bay Items] [Latest News] [How to Order]
A Diverse Selection of Beautifully Unique Gem & Mineral Specimens
Desert Winds Gems & Minerals • For All Levels of Collectors Worldwide
Aesthetic & Rare Mineral Specimens • Regular Updates

General Agardite-(La) Information

Chemical Formula:

(La,Ca)Cu6(AsO4)3(OH)6•3(H2O)

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

Empirical Formula:

La_0.75Ca_0.25Cu₆(AsO₄)₃(OH)₆•3(H₂O)

IMA Status:

Approved IMA 1985 (Dana # Added)

Locality:

USA, NM, Lincoln Co, Red Cloud mn 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-(La)

Agardite-(La) Image

Images:

Agardite-(La)

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

Axial Ratios:

a:c = 1:0.43491

Cell Dimensions:

a = 13.605, c = 5.917, Z = 2; V = 948.48 Den(Calc)= 3.74

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): 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)

Color:

Colorless, Yellowish green, Blue.

Density:

3.72

Diaphaneity:

Transparent

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Agardite-(La)

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)

Electron Density:

Bulk Density (Electron Density)=3.51 gm/cc
note: Specific Gravity of Agardite-(La) =3.74 gm/cc.

Fermion Index:

Fermion Index = 0.0002530845
Boson Index = 0.9997469155

Photoelectric:

PE_{Agardite-(La)}= 75.43 barns/electron
U=PE_{Agardite-(La)} x r_electron= 264.47 barns/cc.

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
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	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

Dana Class:

42.05.01.02a (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-(La) Information

References:

NAME( Dana8) PHYS. PROP.(Dana, MinCryst)

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 - Google Images
6 - Google Scholar
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Agardite-(La) using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Agardite-(La) :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Agardite-(La) Mineral Data :

Ask about Agardite-(La) 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-(La) Specimen Label here :

Agardite-(La)

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

Notes: