Novacekite Mineral Data

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)

IMA Status:

Valid Species (Pre-IMA) 1951

Locality:

Link to MinDat.org Location Data.

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),

Physical Properties of Novacekite

Cleavage:

[001] Perfect, [010] Indistinct, [110] Indistinct

Color:

Light yellow, Straw yellow.

Density:

3.7

Diaphaniety:

Transparent to Opaque

Hardness:

2.5 - Finger Nail

Luminescence:

Fluorescent.

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

Optical Data:

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

Calculated Properties of Novacekite

Electron Density:

r_electron=3.34 gm/cc
note: r_Novacekite=3.70 gm/cc.

Fermion Index

Fermion Index = 0.00571
Boson Index = 0.99429

Photoelectric:

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

Radioactivity:

GRapi = 3,463,108.38 (Gamma Ray American Petroleum Institute Units)

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) 878.31 ±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	80,513,770	2.18E-03	3,463,108.38	1,138.56
100 gm / 3.72 cm	8,051,377	2.18E-04	346,310.84	113.86
10 gm / 1.73 cm	805,138	2.18E-05	34,631.08	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:

40.2a.10.1 (40)Hydrated Phosphates, etc

(40.2a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++

(40.2a.10)Dana Group

40.2a.10.1 Novacekite Mg(UO2)2(AsO4)2·12(H2O) P 4₁/n 4/m

40.2a.10.2 Metanovacekite Mg(UO2)2(AsO4)2·4-8(H2O) P 4/n 4/m

Strunz Class:

VII/E.01-40 VII - Phosphates, Arsenates and Vanadates

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

VII/E.01 - Autunite group

VII/E.01-10 Trogerite H2(UO2)2(AsO4)2·8(H2O) P 4/mmm 4/m 2/m 2/m

VII/E.01-20 Sabugalite HAl(UO2)4(PO4)4·16(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-30 Saleeite Mg(UO2)2(PO4)2·10(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-35 Seelite-1 Mg[(UO2)(AsO3)x(AsO4)1-x]2·7(H2O) C 2/m 2/m

VII/E.01-35* Seelite-2 Mg(UO2)(AsO3)x(AsO4)1-x·7(H2O)(x=0.7) C 2/m 2/m

VII/E.01-40 Novacekite Mg(UO2)2(AsO4)2·12(H2O) P 4₁/n 4/m

VII/E.01-50 Kahlerite Fe(UO2)2(AsO4)2·10-12(H2O) P 4₁/n 4/m

VII/E.01-60 Fritzscheite Mn(UO2)2[(V,P)O4]2·4(H2O) Pnam 2/m 2/m 2/m

VII/E.01-70 Torbernite Cu(UO2)2(PO4)2·8-12(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-80 Zeunerite Cu(UO2)2(AsO4)2·10-16(H2O) P 4/nnc 4/m 2/m 2/m

VII/E.01-90 Autunite Ca(UO2)2(PO4)2·10-12(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-100 Uranospinite Ca(UO2)2(AsO4)2·10(H2O) I 4/mmm 4/m 2/m 2/m

VII/E.01-110 Uranocircite Ba(UO2)2(PO4)2·12(H2O) P 4/nnc 4/m 2/m 2/m

VII/E.01-120 Heinrichite Ba(UO2)2(AsO4)2·10-12(H2O) IA/mmm 4/m 2/m 2/m

VII/E.01-130 Sodium-autunite Na2(UO2)2(PO4)2·8(H2O) P 4/nmm 4/m 2/m 2/m

Other Novacekite Information

References:

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

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

Novacekite

Mg(UO2)2(AsO4)2·12(H2O)
Dana No: 40.2a.10.1 Strunz No: VII/E.01-40
Locality:

Notes:

Nov	OCT	Mar
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2006	2007	2009