Meta-uranocircite Mineral Data

Meta-uranocircite Mineral Data

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General Meta-uranocircite 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.

Meta-uranocircite Image

Images:

Meta-uranocircite

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

Images:

Meta-uranocircite 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:

Meta-uranocircite 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:

Meta-uranocircite

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

Meta-uranocircite 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),

Crystal Structure:

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Khosrawan-Sazedj F , Tschermaks Mineralogische und Petrographische Mitteilungen , 29 (1982) p.193-204, The crystal structure of meta-uranocircite II, Ba(UO2)2(PO4)2*6H2O, Locality: synthetic

Physical Properties of Meta-uranocircite

Color:

Green.

Density:

3.95

Diaphaniety:

Transparent to Translucent

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Fluorescent.

Luster:

Pearly

Optical Properties of Meta-uranocircite

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

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 Meta-uranocircite

Electron Density:

r_electron=3.47 gm/cc
note: r_{Meta-uranocircite}=3.95 gm/cc.

Fermion Index

Fermion Index = 0.02823
Boson Index = 0.97177

Photoelectric:

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

Radioactivity:

GRapi = 3,585,364.47 (Gamma Ray American Petroleum Institute Units)

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

**Estimated Radioactivity from Meta-uranocircite** - 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	85,777,713	2.32E-03	3,585,364.47	1,178.75
100 gm / 3.64 cm	8,577,771	2.32E-04	358,536.45	117.87
10 gm / 1.69 cm	857,777	2.32E-05	35,853.64	11.79
1 gm / 7.85 mm	85,778	2.32E-06	3,585.36	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 Meta-uranocircite 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

Meta-uranocircite Classification

Dana Class:

40.2a.3.2 (40)Hydrated Phosphates, etc

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

(40.2a.3)Dana Group

40.2a.3.1 Uranocircite Ba(UO2)2(PO4)2·12(H2O) P 4/nnc 4/m 2/m 2/m

40.2a.3.2 Meta-uranocircite Ba(UO2)2(PO4)2·6-8(H2O) P 2₁ 2

Strunz Class:

VII/E.02-110 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 Meta-uranocircite 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 Meta-uranocircite :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - Crocoite.com Mineral Locations 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals

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Print or Cut-and-Paste your Meta-uranocircite Specimen Label here :

Meta-uranocircite

Ba(UO2)2(PO4)2·6-8(H2O)
Dana No: 40.2a.3.2 Strunz No: VII/E.02-110
Locality:

Notes: