Metanovacekite Mineral Data

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General Metanovacekite Information

Chemical Formula:

Mg(UO2)2(AsO4)2•4-8(H2O)

Composition:

Molecular Weight = 950.29 gm

Magnesium 2.56 % Mg 4.24 % MgO

Uranium 50.10 % U 56.83 % UO₂

Arsenic 15.77 % As 24.19 % As₂O₅

Hydrogen 1.27 % H 11.37 % H₂O

Oxygen 30.31 % O

______ ______

100.00 % 96.63 % = TOTAL OXIDE

Empirical Formula:

Mg(UO₂)₂(AsO₄)₂•6(H₂O)

Environment:

Dehydration product of novacekite.

IMA Status:

Valid Species (Pre-IMA) 1958

Locality:

Anton mine, Heubachtal, near Schiltach, Black Forest, Germany. Link to MinDat.org Location Data.

Name Origin:

The prefix meta indicates the dehydration product of novacekite.

Name Pronunciation:

Metanovacekite + Pronunciation

Metanovacekite Image

Images:

Click Here for Larger Metanovacekite Image

Metanovacekite Novacekite

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:

Metanovacekite

Comments: Bright yellow crystalline metanovacekite coatings on white crystalline gypsum.
Location: Las Animas Mine, Municipio do Heuiles Serdan, Chihuahua, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Metanovacekite Crystallography

Axial Ratios:

a:c = 1:1.19832

Cell Dimensions:

a = 7.16, c = 8.58, Z = 1; V = 439.86 Den(Calc)= 3.59

Crystal System:

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

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

By Intensity(I/I_o): 8.52(1), 3.57(0.9), 2.14(0.6),

Physical Properties of Metanovacekite

Cleavage:

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

Color:

Yellow, Light yellow.

Density:

3.51

Diaphaneity:

Subopaque

Hardness:

2.5 - Finger Nail

Luminescence:

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

Luster:

Vitreous (Glassy)

Streak:

yellow white

Optical Properties of Metanovacekite

Gladstone-Dale:

CI meas= -0.221 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.194 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1709,KPDmeas= 0.1748,KC= 0.1432
Ncalc = 1.5 - 1.51

Optical Data:

Uniaxial (-), e=1.595, w=1.632, bire=0.0370.

Calculated Properties of Metanovacekite

Electron Density:

Bulk Density (Electron Density)=3.16 gm/cc
note: Specific Gravity of Metanovacekite =3.59 gm/cc.

Fermion Index:

Fermion Index = 0.0063119282
Boson Index = 0.9936880718

Photoelectric:

PE_{Metanovacekite}=1,303.64 barns/electron
U=PE_{Metanovacekite} x r_electron=4,117.19 barns/cc.

Radioactivity:

GRapi = 3,756,530.70 (Gamma Ray American Petroleum Institute Units)
Concentration of Metanovacekite per GRapi unit = 266.20 (PPB)

Metanovacekite 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) 8.10 ± 2.02 grams of pure Metanovacekite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 809.70 ±202.43 grams of pure Metanovacekite .

**Estimated Radioactivity from Metanovacekite** - 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 / 8.10 cm	89,671,893	2.42E-03	3,756,530.70	1,235.02
100 gm / 3.76 cm	8,967,189	2.42E-04	375,653.07	123.50
10 gm / 1.75 cm	896,719	2.42E-05	37,565.31	12.35
1 gm / 8.10 mm	89,672	2.42E-06	3,756.53	1.24
0.1 gm / 3.76 mm	8,967	2.42E-07	375.65	0.12
0.01 gm / 1.75 mm	897	2.42E-08	37.57	0.01
0.001 gm / 0.81 mm	90	2.42E-09	3.76	0.00

Weight of pure Metanovacekite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.59 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

Metanovacekite Classification

Dana Class:

40.02a.10.02 (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.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.E - Uranyl Phosphates and Arsenates

08.EB -UO2:RO4 = 1:1

08.EB.10 Bassetite Fe(UO2)2(PO4)2•8(H2O) P 2₁/m 2/m

08.EB.10 Lehnerite Mn[UO2/PO4]2•8(H2O) P 2₁/n 2/m

08.EB.10 Metazeunerite Cu(UO2)2(AsO4)2•8(H2O) P 4/n 4/m

08.EB.10 Meta-autunite Ca(UO2)2(PO4)2•2-6(H2O) P 4/nmm 4/m 2/m 2/m

08.EB.10 Metauranocircite Ba(UO2)2(PO4)2•6-8(H2O) P 2₁ 2

08.EB.10 Metauranospinite Ca(UO2)2(AsO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m

08.EB.10 Metaheinrichite Ba(UO2)2(AsO4)2•8(H2O) P 2₁ 2

08.EB.10 Metakahlerite Fe(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m

08.EB.10 Metakirchheimerite Co(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m

08.EB.10 Metalodevite Zn(UO2)2(AsO4)2•10(H2O) P 4₁/m 4/m

08.EB.10 Metanovacekite Mg(UO2)2(AsO4)2•4-8(H2O) P 4/n 4/m

08.EB.10 Metatorbernite Cu(UO2)2(PO4)2•8(H2O) P 4/n 4/m

08.EB.10 Przhevalskite Pb(UO2)2(PO4)2•4(H2O) Unk Tetra

Other Metanovacekite 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 Metanovacekite :
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

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

Metanovacekite

Mg(UO2)2(AsO4)2•4-8(H2O)
Dana No: 40.02a.10.02 Strunz No: 08.EB.10
Locality:

Notes: