Agrinierite Mineral Data

Agrinierite Mineral Data +

General Agrinierite Information

Chemical Formula:

(K2,Ca,Sr)U3O10·4(H2O)

Composition:

Molecular Weight = 998.94 gm

Potassium 1.57 % K 1.89 % K₂O

Strontium 1.75 % Sr 2.07 % SrO

Calcium 1.60 % Ca 2.25 % CaO

Uranium 71.48 % U 85.90 % UO₃

Hydrogen 0.85 % H 7.57 % H₂O

Oxygen 22.74 % O

______ ______

100.00 % 99.68 % = TOTAL OXIDE

Empirical Formula:

Ca_0.4K_0.4Sr_0.2U₃O₁₀·4.2(H₂O)

Environment:

In the oxidized zone of a uranium deposit.

IMA Status:

Approved IMA 1971

Locality:

Margnac mine, Compreignac, Haute-Vienne, France. Link to MinDat.org Location Data.

Name Origin:

Named for Henri Agrinier (1928-1971), an engineer in the Mineralogy Laboratory if the French Atomic Energy Commission, Paris, France.

Synonym:

ICSD 89723

PDF 25-630

Agrinierite Image

Images:

Agrinierite

Comments: Golden yellow, transparent agrinierite crystals.
Location: Margnac mine, Compreignac, Haute-Vienne, France. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Agrinierite Crystallography

Axial Ratios:

a:b:c =0.5832:1:0.587

Cell Dimensions:

a = 14.04, b = 24.07, c = 14.13, Z = 16; V = 4,775.13 Den(Calc)= 5.56

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mmm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.128(1), 7.08(1), 3.485(0.8),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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H - Help Screen
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Cahill C L , Burns P C , American Mineralogist , 85 (2000) p.1294-1297, The structure of agrinierite: a Sr-containing uranyl oxide hydrate mineral

Physical Properties of Agrinierite

Cleavage:

[001] Good

Color:

Orange.

Density:

5.62 - 5.7, Average = 5.66

Diaphaniety:

Transparent to Translucent

Habit:

Lamellar - Thin laminae producing a lamellar structure.

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Luster:

Resinous - Greasy

Magnetism:

Nonmagnetic

Optical Properties of Agrinierite

Gladstone-Dale:

CI meas= -0.32 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.344 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1862,KPDmeas= 0.1829,KC= 0.1385

Optical Data:

Biaxial (?), b=2.01, g=2.06, , 2V(Meas)=55.

Calculated Properties of Agrinierite

Electron Density:

r_electron=4.77 gm/cc
note: r_Agrinierite=5.66 gm/cc.

Fermion Index

Fermion Index = 0.0065
Boson Index = 0.9935

Photoelectric:

PE_Agrinierite=1,925.80 barns/electron
U=PE_Agrinierite x r_electron=9,191.95 barns/cc.

Radioactivity:

GRapi = 5,138,379.05 (Gamma Ray American Petroleum Institute Units)

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

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 5.92 ± 1.48 grams of pure Agrinierite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 591.95 ±147.99 grams of pure Agrinierite .

**Estimated Radioactivity from Agrinierite** - very strong
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 / 6.96 cm	127,957,694	3.46E-03	5,138,379.05	1,689.33
100 gm / 3.23 cm	12,795,769	3.46E-04	513,837.90	168.93
10 gm / 1.50 cm	1,279,577	3.46E-05	51,383.79	16.89
1 gm / 6.96 mm	127,958	3.46E-06	5,138.38	1.69
0.1 gm / 3.23 mm	12,796	3.46E-07	513.84	0.17
0.01 gm / 1.50 mm	1,280	3.46E-08	51.38	0.02
0.001 gm / 0.70 mm	128	3.46E-09	5.14	0.00

Weight of pure Agrinierite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.66 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

Agrinierite Classification

Dana Class:

5.5.1.1 (5)Oxides Containing Uranium and Thorium

(5.5)with alkaline and alkaline-earth elements (hydrated)

(5.5.1)Dana Group

5.5.1.1 Agrinierite (K2,Ca,Sr)U3O10·4(H2O) C mmm 2/m 2/m 2/m

Strunz Class:

IV/H.02-10 IV - Oxides

IV/H - Uranyl ([UO2]2+) hydroxides and hydrates

IV/H.02 - Agrinierite - Rameauite series

IV/H.02-10 Agrinierite (K2,Ca,Sr)U3O10·4(H2O) C mmm 2/m 2/m 2/m

IV/H.02-20 Rameauite K2CaU6O20·9(H2O) C 2/c,Cc Mono

Other Agrinierite Information

References:

NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Agrinierite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 -École des Mines de Paris

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Agrinierite

(K2,Ca,Sr)U3O10·4(H2O)
Dana No: 5.5.1.1 Strunz No: IV/H.02-10
Locality:

Notes: