Novacekite Mineral Data

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General Novacekite Information

Chemical Formula:

Mg(UO2)2(AsO4)2•12(H2O)

Composition:

Molecular Weight = 1,058.38 gm

Magnesium 2.30 % Mg 3.81 % MgO

Uranium 44.98 % U 51.03 % UO₂

Arsenic 14.16 % As 21.72 % As₂O₅

Hydrogen 2.29 % H 20.43 % H₂O

Oxygen 36.28 % O

______ ______

100.00 % 96.98 % = TOTAL OXIDE

Empirical Formula:

Mg(UO₂)₂(AsO₄)₂•12(H₂O)

Environment:

Oxidized zone of uranium-bearing polymetallic hydrothermal mineral deposits.

IMA Status:

Valid Species (Pre-IMA) 1951

Locality:

Schneeberg, Saxony, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Radim Novacek (1905-1942), Czech mineralogist, for his contributions to the mineralogy of uranium.

Name Pronunciation:

Novacekite + Pronunciation

Novacekite Image

Images:

Novacekite Metanovacekite

Comments: Yellow, translucent platy novacekite/metanovacekite crystal aggregate.
Location: Rabejac Mine, Olmet, Herault, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Novacekite

Comments: Scanner image of massive, yellow novacekite covering matrix.
Location: Serra das Éguas,Bahia, Northeast Region, Brazil. Scale: Specimen size 4.1 cm.
© Paul M. Schumacher

Novacekite Crystallography

Axial Ratios:

a:c = 1:2.82137

Cell Dimensions:

a = 7.11, c = 20.06, Z = 2; V = 1,014.08 Den(Calc)= 3.47

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: P 4₁/n

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

By Intensity(I/I_o): 10.15(1), 3.58(0.9), 5.06(0.8),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
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Locock A J , Burns P C , Flynn M , The Canadian Mineralogist , 42 (2004) p.1699-1718, Divalent transition metals and magnesium in structures, that contain the autunite-type sheet, Sample: MgUAs12

Physical Properties of Novacekite

Cleavage:

{001} Perfect, {010} Indistinct, {110} Indistinct

Color:

Light yellow, Straw yellow.

Density:

3.7

Diaphaneity:

Transparent to Opaque

Hardness:

2.5 - Finger Nail

Luminescence:

Fluorescent, Short UV=dull green, Long UV=dull green.

Luster:

Vitreous (Glassy)

Streak:

yellow white

Optical Properties of Novacekite

Dichroism (e):

colorless.

Dichroism (w):

colorless.

Gladstone-Dale:

CI meas= -0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.106 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1805,KPDmeas= 0.1693,KC= 0.1633
Ncalc = 1.57 - 1.6

Optical Data:

Uniaxial (-), e=1.62-1.625, w=1.62-1.641, bire=0.0000-0.0160.

Calculated Properties of Novacekite

Electron Density:

Bulk Density (Electron Density)=3.34 gm/cc
note: Specific Gravity of Novacekite =3.70 gm/cc.

Fermion Index:

Fermion Index = 0.005712547
Boson Index = 0.994287453

Photoelectric:

PE_Novacekite=1,140.04 barns/electron
U=PE_Novacekite x r_electron=3,810.12 barns/cc.

Radioactivity:

GRapi = 3,463,110.05 (Gamma Ray American Petroleum Institute Units)
Concentration of Novacekite per GRapi unit = 288.76 (PPB)

Novacekite 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) 8.78 ± 2.20 grams of pure Novacekite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 878.30 ±219.58 grams of pure Novacekite .

**Estimated Radioactivity from Novacekite** - 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 / 8.02 cm	80,513,778	2.18E-03	3,463,110.05	1,138.56
100 gm / 3.72 cm	8,051,378	2.18E-04	346,311.00	113.86
10 gm / 1.73 cm	805,138	2.18E-05	34,631.10	11.39
1 gm / 8.02 mm	80,514	2.18E-06	3,463.11	1.14
0.1 gm / 3.72 mm	8,051	2.18E-07	346.31	0.11
0.01 gm / 1.73 mm	805	2.18E-08	34.63	0.01
0.001 gm / 0.80 mm	81	2.18E-09	3.46	0.00

Weight of pure Novacekite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.70 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

Novacekite Classification

Dana Class:

40.02a.10.01 (40)Hydrated Phosphates, etc

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

(40.02a.10)Dana Group

40.02a.10.01 Novacekite Mg(UO2)2(AsO4)2•12(H2O) P 4₁/n 4/m

40.02a.10.02 Metanovacekite Mg(UO2)2(AsO4)2•4-8(H2O) P 4/n 4/m

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 Novacekite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Print or Cut-and-Paste your Novacekite Specimen Label here :

Novacekite

Mg(UO2)2(AsO4)2•12(H2O)
Dana No: 40.02a.10.01 Strunz No: 08.EB.05
Locality:

Notes: