Moreauite Mineral Data

Moreauite Mineral Data +

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General Moreauite Information

Chemical Formula:

Al3(UO2)(PO4)3(OH)2·13(H2O)

Composition:

Molecular Weight = 904.10 gm

Uranium 26.33 % U 29.87 % UO₂

Aluminum 8.95 % Al 16.92 % Al₂O₃

Phosphorus 10.28 % P 23.55 % P₂O₅

Hydrogen 3.12 % H 27.90 % H₂O

Oxygen 51.32 % O

______ ______

100.00 % 98.23 % = TOTAL OXIDE

Empirical Formula:

Al₃(UO₂)(PO₄)₃(OH)₂·13(H₂O)

IMA Status:

Approved IMA 1985

Locality:

Link to MinDat.org Location Data.

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Moreauite Crystallography

Axial Ratios:

a:b:c =1.0918:1:0.8554

Cell Dimensions:

a = 23.41, b = 21.44, c = 18.34, Z = 16; beta = 92° V = 9,199.43 Den(Calc)= 2.61

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 10.8(1), 11.69(0.8), 2.931(0.7),

Physical Properties of Moreauite

Cleavage:

[100] Good

Color:

Greenish yellow, Light yellow.

Density:

2.64

Hardness:

2-3 - Gypsum-Calcite

Streak:

light yellow

Optical Properties of Moreauite

Gladstone-Dale:

CI meas= -0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.039 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2107,KPDmeas= 0.2083,KC= 0.2028

Optical Data:

Biaxial (-), a=1.54, b=1.552, g=1.558, bire=0.0180, 2V(Calc)=70, 2V(Meas)=70.

Calculated Properties of Moreauite

Electron Density:

r_electron=2.55 gm/cc
note: r_Moreauite=2.64 gm/cc.

Fermion Index

Fermion Index = 0.00214
Boson Index = 0.99786

Photoelectric:

PE_Moreauite= 620.17 barns/electron
U=PE_Moreauite x r_electron=1,579.13 barns/cc.

Radioactivity:

GRapi = 2,164,447.20 (Gamma Ray American Petroleum Institute Units)

Moreauite 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) 14.05 ± 3.51 grams of pure Moreauite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1405.3 ±351.32 grams of pure Moreauite .

**Estimated Radioactivity from Moreauite** - 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 / 8.98 cm	47,126,619	1.27E-03	2,164,447.20	711.60
100 gm / 4.17 cm	4,712,662	1.27E-04	216,444.72	71.16
10 gm / 1.93 cm	471,266	1.27E-05	21,644.47	7.12
1 gm / 8.98 mm	47,127	1.27E-06	2,164.45	0.71
0.1 gm / 4.17 mm	4,713	1.27E-07	216.44	0.07
0.01 gm / 1.93 mm	471	1.27E-08	21.64	0.01
0.001 gm / 0.90 mm	47	1.27E-09	2.16	0.00

Weight of pure Moreauite in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.64 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

Moreauite Classification

Dana Class:

42.12.3.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.12)with miscellaneous formulae

(42.12.3)Dana Group

42.12.3.1 Moreauite Al3(UO2)(PO4)3(OH)2·13(H2O) P 2₁/c 2/m

Strunz Class:

VII/E.05-60 VII - Phosphates, Arsenates and Vanadates

VII/E - Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-

VII/E.05 - Ranunculite - Moreauite series

VII/E.05-10 Ranunculite HAl(UO2)(PO4)(OH)3·4(H2O) Unk (pseudo ORTH) Mono

VII/E.05-20 Triangulite Al3(UO2)4(PO4)4(OH)5·5(H2O) P1,P 1 Tri

VII/E.05-30 Upalite Al(UO2)3(PO4)2O(OH)·7(H2O) P 2₁/a 2/m

VII/E.05-40 Threadgoldite Al(UO2)2(PO4)2(OH)·8(H2O) C 2/c 2/m

VII/E.05-50 Furongite Al2(UO2)(PO4)3(OH)2·8(H2O) P1 1

VII/E.05-60 Moreauite Al3(UO2)(PO4)3(OH)2·13(H2O) P 2₁/c 2/m

Other Moreauite Information

References:

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

See Also:

Links to other databases for Moreauite :
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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Moreauite

Al3(UO2)(PO4)3(OH)2·13(H2O)
Dana No: 42.12.3.1 Strunz No: VII/E.05-60
Locality:

Notes: