Mineralogy Database

Novacekite Mineral Data

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General Novacekite Information

Help on Chemical  Formula: Chemical Formula: Mg(UO2)2(AsO4)2•12(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Mg(UO2)2(AsO4)2•12(H2O)
Help on Environment: Environment: Oxidized zone of uranium-bearing polymetallic hydrothermal mineral deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1951
Help on Locality: Locality: Schneeberg, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Radim Novacek (1905-1942), Czech mineralogist, for his contributions to the mineralogy of uranium.
Help on Name Pronunciation: Name Pronunciation: Novacekite + Pronunciation Say NOVACEKITE

Novacekite Image

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  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

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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

Help on Axial Ratios: Axial Ratios: a:c = 1:2.82137
Help on Cell Dimensions: Cell Dimensions: a = 7.11, c = 20.06, Z = 2; V = 1,014.08 Den(Calc)= 3.47
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: P 41/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.15(1), 3.58(0.9), 5.06(0.8),

Physical Properties of Novacekite

Help on Cleavage: Cleavage: {001} Perfect, {010} Indistinct, {110} Indistinct
Help on Color: Color: Light yellow, Straw yellow.
Help on Density: Density: 3.7
Help on Diaphaneity: Diaphaneity: Transparent to Opaque
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Short UV=dull green, Long UV=dull green.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow white

Optical Properties of Novacekite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Uniaxial (-), e=1.62-1.625, w=1.62-1.641, bire=0.0000-0.0160.

Calculated Properties of Novacekite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.34 gm/cc
note: Specific Gravity of Novacekite =3.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.005712547
Boson Index = 0.994287453
Help on Photoelectric: Photoelectric: PENovacekite =1,140.04 barns/electron
U=PENovacekite x relectron=3,810.12 barns/cc.
Help on Radioactivity: 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
Curies (Ci)
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

Help on  Dana Class: 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
Help on  Strunz Class: 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

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990;Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

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


Dana No: 40.02a.10.01 Strunz No: 08.EB.05





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