Metarauchite Mineral Data

General Metarauchite Information

Chemical Formula:

Ni(UO2)2(AsO4)2•8H2O

Composition:

Molecular Weight = 1,020.71 gm

Uranium 46.64 % U 52.91 % UO₂

Nickel 5.75 % Ni 7.32 % NiO

Arsenic 14.68 % As 22.52 % As₂O₅

Hydrogen 1.58 % H 14.12 % H₂O

Oxygen 31.35 % O

______ ______

100.00 % 96.87 % = TOTAL OXIDE

Empirical Formula:

Ni(UO₂)₂(AsO₄)₂•8(H₂O)

Environment:

Autunite group

IMA Status:

Proposed IMA 2008 (Dana # Added)

Locality:

Eduard mine, Jáchymov district, Czech Republic Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2008-050

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Metarauchite Crystallography

Axial Ratios:

a:b:c =0.7371:1:1.3557

Cell Dimensions:

a = 7.194, b = 9.759, c = 13.231, Z = 2; alpha = 75.53°, beta = 84.01°, gamma = 81.59° V = 884.90 Den(Calc)= 3.83

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 8.625(1), 3.568(0.5), 5.044(0.29),3.492(0.28), 3.424(0.26), 4.277(0.26), 5.078(0.25), 2.99(0.21),

Optical Properties of Metarauchite

Optical Data:

NCalc= 1.57 - from Gladstone-Dale relationship (KC = 0.1503) where Ncalc=Dcalc*KC+1

Calculated Properties of Metarauchite

Electron Density:

Bulk Density (Electron Density)=3.40 gm/cc
note: Specific Gravity of Metarauchite =3.82 gm/cc.

Fermion Index:

Fermion Index = 0.0041606753
Boson Index = 0.9958393247

Photoelectric:

PE_Metarauchite=1,202.73 barns/electron
U=PE_Metarauchite x r_electron=4,087.11 barns/cc.

Radioactivity:

GRapi = 3,536,534.50 (Gamma Ray American Petroleum Institute Units)
Concentration of Metarauchite per GRapi unit = 282.76 (PPB)

Metarauchite 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) 8.60 ± 2.15 grams of pure Metarauchite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 860.07 ±215.02 grams of pure Metarauchite .

**Estimated Radioactivity from Metarauchite** - very strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.94 cm	83,485,688	2.26E-03	3,536,534.50	1,162.70
100 gm / 3.68 cm	8,348,569	2.26E-04	353,653.45	116.27
10 gm / 1.71 cm	834,857	2.26E-05	35,365.35	11.63
1 gm / 7.94 mm	83,486	2.26E-06	3,536.53	1.16
0.1 gm / 3.68 mm	8,349	2.26E-07	353.65	0.12
0.01 gm / 1.71 mm	835	2.26E-08	35.37	0.01
0.001 gm / 0.79 mm	83	2.26E-09	3.54	0.00

Weight of pure Metarauchite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.82 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

Metarauchite Classification

Dana Class:

40.02a.17.02 (40)Hydrated Phosphates, etc

(40.02a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++

(40.02a.17)Dana Group

40.02a.17.01 Metakirchheimerite Co(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m

40.02a.17.02 Metarauchite! Ni(UO2)2(AsO4)2•8H2O P1 1

Strunz Class:

08.EB.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.E - Uranyl Phosphates and Arsenates

08.EB -UO2:RO4 = 1:1

08.EB.05 Autunite Ca(UO2)2(PO4)2•10-12(H2O) I 4/mmm 4/m 2/m 2/m

08.EB.05 Heinrichite Ba(UO2)2(AsO4)2•10-12(H2O) P 2/c 2/m

08.EB.05 Kahlerite Fe(UO2)2(AsO4)2•10-12(H2O) P 4₁/n 4/m

08.EB.05 Uranocircite Ba(UO2)2(PO4)2•12(H2O) P 4/nnc 4/m 2/m 2/m

08.EB.05 Novacekite Mg(UO2)2(AsO4)2•12(H2O) P 4₁/n 4/m

08.EB.05 Saleeite Mg(UO2)2(PO4)2•10(H2O) I 4/mmm 4/m 2/m 2/m

08.EB.05 Xiangjiangite (Fe,Al)(UO2)4(PO4)2(SO4)2(OH)•22(H2O) C 2/c or Cc Mono

08.EB.05 Torbernite Cu(UO2)2(PO4)2•8-12(H2O) I 4/mmm 4/m 2/m 2/m

08.EB.05 Uranospinite Ca(UO2)2(AsO4)2•10(H2O) P nma 2/m 2/m 2/m

08.EB.05 Zeunerite Cu(UO2)2(AsO4)2•10-16(H2O) P 4/nnc 4/m 2/m 2/m

08.EB.05 Metarauchite! Ni(UO2)2(AsO4)2•8H2O P1 1

Other Metarauchite Information

See Also:

Links to other databases for Metarauchite :
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 Metarauchite Specimen Label here :

Metarauchite

Ni(UO2)2(AsO4)2•8H2O
Dana No: 40.02a.17.02 Strunz No: 08.EB.05
Locality:

Notes: