Metanovacekite Mineral Data

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)

IMA Status:

Valid Species (Pre-IMA) 1958

Locality:

Link to MinDat.org Location Data.

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

Diaphaniety:

Subopaque

Hardness:

2.5 - Finger Nail

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

Optical Data:

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

Calculated Properties of Metanovacekite

Electron Density:

r_electron=3.16 gm/cc
note: r_{Metanovacekite}=3.59 gm/cc.

Fermion Index

Fermion Index = 0.00631
Boson Index = 0.99369

Photoelectric:

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

Radioactivity:

GRapi = 3,756,528.07 (Gamma Ray American Petroleum Institute Units)

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	89,671,876	2.42E-03	3,756,528.07	1,235.02
100 gm / 3.76 cm	8,967,188	2.42E-04	375,652.81	123.50
10 gm / 1.75 cm	896,719	2.42E-05	37,565.28	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:

40.2a.10.2 (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.02-10 VII - Phosphates, Arsenates and Vanadates

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

VII/E.02 - Meta-autunite group

VII/E.02-10 Metanovacekite Mg(UO2)2(AsO4)2·4-8(H2O) P 4/n 4/m

VII/E.02-20 Bassetite Fe(UO2)2(PO4)2·8(H2O) P 2₁/m 2/m

VII/E.02-30 Metakahlerite Fe(UO2)2(AsO4)2·8(H2O) P 4/mmm 4/m 2/m 2/m

VII/E.02-40 Lehnerite Mn[UO2/PO4]2·8(H2O) P 2₁/n 2/m

VII/E.02-50 Metakirchheimerite Co(UO2)2(AsO4)2·8(H2O) P 4/mmm 4/m 2/m 2/m

VII/E.02-60 Metatorbernite Cu(UO2)2(PO4)2·8(H2O) P 4/n 4/m

VII/E.02-70 Metazeunerite Cu(UO2)2(AsO4)2·8(H2O) P 4/n 4/m

VII/E.02-80 Metalodevite Zn(UO2)2(AsO4)2·10(H2O) P 4₁/m 4/m

VII/E.02-90 Meta-autunite Ca(UO2)2(PO4)2·2-6(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-95 Sodium meta-autunite! Na2(UO2)2(PO4)2·6-8(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-100 Meta-uranospinite Ca(UO2)2(AsO4)2·8(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-110 Meta-uranocircite Ba(UO2)2(PO4)2·6-8(H2O) P 2₁ 2

VII/E.02-120 Metaheinrichite Ba(UO2)2(AsO4)2·8(H2O) P 4₁/? 4/m

VII/E.02-130 Sodium-uranospinite (Na2,Ca)(UO2)2(AsO4)2·5(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-140 Meta-ankoleite K2(UO2)2(PO4)2·6(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-150 Abernathyite K(UO2)(AsO4)·4(H2O) P 4/ncc 4/m 2/m 2/m

VII/E.02-160 Uramphite (NH4)(UO2)(PO4)·3(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-170 Chernikovite (H3O)2(UO2)2(PO4)2·6(H2O) P 4/nmm 4/m 2/m 2/m

VII/E.02-180 Pseudo-autunite* (H3O)4Ca2(UO2)2(PO4)4·5(H2O)(?) Unk Ortho

VII/E.02-190 Ulrichite CaCu(UO2)(PO4)2·4(H2O) C 2/m 2/m

Other Metanovacekite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) 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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Metanovacekite

Mg(UO2)2(AsO4)2·4-8(H2O)
Dana No: 40.2a.10.2 Strunz No: VII/E.02-10
Locality:

Notes: