Metauranocircite Mineral Data

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General Metauranocircite Information

Chemical Formula:

Ba(UO2)2(PO4)2•6-8(H2O)

Composition:

Molecular Weight = 993.43 gm

Barium 13.82 % Ba 15.43 % BaO

Uranium 47.92 % U 54.36 % UO₂

Phosphorus 6.24 % P 14.29 % P₂O₅

Hydrogen 1.42 % H 12.69 % H₂O

Oxygen 30.60 % O

______ ______

100.00 % 96.78 % = TOTAL OXIDE

Empirical Formula:

Ba(UO₂)₂(PO₄)₂•7(H₂O)

Environment:

Secndary mineral derived from phosphatic uraninite deposits.

IMA Status:

Approved IMA 1982

Locality:

Bergen, Falkenstein, Vogtland, Sachsen (Saxony), Germany. Link to MinDat.org Location Data.

Name Origin:

Named for its lower hydrate relationship to uranocercite.

Synonym:

Meta-uranocircite - Renamed as Metauranocircite by Mineralogical Record, v330 (2008), p131

Metauranocircite Image

Images:

Metauranocircite

Comments: Yellow crystals of meta-uranocircite.
Location: Krunkelbachtal, Baden-Wurttemberg, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Metauranocircite Uranocircite

Comments: Brilliant, fluorescent yellow green crystals of uranocircite altered to meta-uranocircite.
Location: Bergen, Vogtland, Saxony, Germany. Scale: 2.3 x 2.2 cm.
© John Veevaert

Images:

Metauranocircite Uranocircite

Comments: Crystal fragment of uranocircite fracturing due to dehydration to meta-uranocircite. The most common are 100 and 010 fractures, with 110 close behind. But notice the 210 and 410 fractures (breaks) as well.
Location: . Scale: Crystal size 2x3.5 cm.
© Paul M. Schumacher

Images:

Metauranocircite

Comments: Lemon yellow platy meta-uranocircite crystals on matrix.
Location: Schneeberg, Saxony, Germany. Scale: Crystal size 2 mm.
© Tom Loomis / Dakota Matrix

Metauranocircite Crystallography

Axial Ratios:

a:b:c =1.0001:1:2.5344

Cell Dimensions:

a = 6.965, b = 6.964, c = 17.65, Z = 2; beta = 90.6° V = 856.05 Den(Calc)= 3.85

Crystal System:

Monoclinic - SphenoidalH-M Symbol (2) Space Group: P 2₁

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

By Intensity(I/I_o): 3.6(1), 8.34(0.9), 4.23(0.4),

Physical Properties of Metauranocircite

Color:

Green.

Density:

3.95

Diaphaneity:

Transparent to Translucent

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Fluorescent.

Luster:

Pearly

Optical Properties of Metauranocircite

Gladstone-Dale:

CI meas= -0.092 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.12 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1607,KPDmeas= 0.1566,KC= 0.1434
Ncalc = 1.55 - 1.57

Optical Data:

Biaxial (-), a=1.61, b=1.623, g=1.623, bire=0.0130

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Metauranocircite

Electron Density:

Bulk Density (Electron Density)=3.47 gm/cc
note: Specific Gravity of Metauranocircite =3.95 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Metauranocircite}=1,302.10 barns/electron
U=PE_{Metauranocircite} x r_electron=4,514.59 barns/cc.

Radioactivity:

GRapi = 3,585,366.40 (Gamma Ray American Petroleum Institute Units)
Concentration of Metauranocircite per GRapi unit = 278.91 (PPB)

Metauranocircite 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) 8.48 ± 2.12 grams of pure Metauranocircite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 848.36 ±212.09 grams of pure Metauranocircite .

**Estimated Radioactivity from Metauranocircite** - 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 / 7.85 cm	85,777,727	2.32E-03	3,585,366.40	1,178.75
100 gm / 3.64 cm	8,577,773	2.32E-04	358,536.64	117.88
10 gm / 1.69 cm	857,777	2.32E-05	35,853.66	11.79
1 gm / 7.85 mm	85,778	2.32E-06	3,585.37	1.18
0.1 gm / 3.64 mm	8,578	2.32E-07	358.54	0.12
0.01 gm / 1.69 mm	858	2.32E-08	35.85	0.01
0.001 gm / 0.78 mm	86	2.32E-09	3.59	0.00

Weight of pure Metauranocircite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.95 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

Metauranocircite Classification

Dana Class:

40.02a.03.02 (40)Hydrated Phosphates, etc

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

(40.02a.03)Dana Group

40.02a.03.01 Uranocircite Ba(UO2)2(PO4)2•12(H2O) P 4/nnc 4/m 2/m 2/m

40.02a.03.02 Metauranocircite Ba(UO2)2(PO4)2•6-8(H2O) P 2₁ 2

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 Metauranocircite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990, AmMin 89:1833) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Metauranocircite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - Handbook of Mineralogy (UofA)
6 - MinDAT
7 - MinMax(Deutsch)
8 - MinMax(English)
9 - Mineralienatlas (Deutsch)
10 - QUT Mineral Atlas
11 - Ruff.Info

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

Metauranocircite

Ba(UO2)2(PO4)2•6-8(H2O)
Dana No: 40.02a.03.02 Strunz No: 08.EB.10
Locality:

Notes: