Mineralogy Database

Uranocircite Mineral Data

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General Uranocircite Information

Help on Chemical  Formula: Chemical Formula: Ba(UO2)2(PO4)2•12(H2O)
Help on Composition: Composition: Molecular Weight = 1,083.51 gm
   Barium      12.67 %  Ba   14.15 % BaO
   Uranium     43.94 %  U    49.84 % UO2
   Phosphorus   5.72 %  P    13.10 % P2O5
   Hydrogen     2.23 %  H    19.95 % H2O
   Oxygen      35.44 %  O
              ______        ______ 
              100.00 %       97.05 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba(UO2)2(PO4)2•12(H2O)
Help on Environment: Environment: Secondary mineral in quartz veins with other secondary uranium minerals. Dehydrates rapidly to meta-uranocircite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1877
Help on Locality: Locality: Bergen, near Falkenstein in Voigtland, Saxony, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition and from the Greek for "falcon" because it was discovered in Falkenstein, Germany.
Help on Name Pronunciation: Name Pronunciation: Uranocircite + Pronunciation Say URANOCIRCITE
 

Uranocircite Image

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  Uranocircite   Metauranocircite

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

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  Phosphuranylite   Uranocircite

Comments: Yellow, waxy phosphuranylite with green uranocircite in matrix.
Location: Bergen, Falkenstein, Vogtland, Saxony, Germany. Scale: Picture size 0.5 cm.
© Paul M. Schumacher

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  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

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  Uranocircite

Comments: Yellowish green square, foliated uranocircite crystal.
Location: Bergen, Falkenstein, Vogtland, Saxony, Germany. Scale: Crystal size 1.3 cm.
© Tom Loomis / Dakota Matrix

Uranocircite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.91868
Help on Cell Dimensions: Cell Dimensions: a = 7.01, c = 20.46, Z = 2; V = 1,005.41 Den(Calc)= 3.58
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/nnc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.04(1), 5.1(1), 10.1(0.6),
 

Physical Properties of Uranocircite

Help on Cleavage: Cleavage: {001} Perfect, {100} Distinct
Help on Color: Color: Yellow, Yellow green.
Help on Density: Density: 3.46
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Short UV=green, Long UV=green.
Help on Luster: Luster: Pearly
Help on Streak: Streak: light yellow
 

Optical Properties of Uranocircite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1625,KPDmeas= 0.1681,KC= 0.1598
Ncalc = 1.55 - 1.57
Help on Optical Data: Optical Data: Biaxial (-), a=1.574, b=1.583, g=1.588, bire=0.0140, 2V(Calc)=72, 2V(Meas)=70.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): pale canary yellow.
Help on Pleochroism (z): Pleochroism (z): pale canary yellow.
 

Calculated Properties of Uranocircite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.21 gm/cc
note: Specific Gravity of Uranocircite =3.58 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEUranocircite =1,168.17 barns/electron
U=PEUranocircite x relectron=3,751.66 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,359,657.88 (Gamma Ray American Petroleum Institute Units)
Concentration of Uranocircite per GRapi unit = 297.65 (PPB)

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) 9.05 ± 2.26 grams of pure Uranocircite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 905.35 ±226.34 grams of pure Uranocircite .

Estimated Radioactivity from 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 / 8.11 cm 78,646,681 2.13E-03 3,359,657.88 1,104.55
100 gm / 3.76 cm 7,864,668 2.13E-04 335,965.79 110.45
10 gm / 1.75 cm 786,467 2.13E-05 33,596.58 11.05
1 gm / 8.11 mm 78,647 2.13E-06 3,359.66 1.10
0.1 gm / 3.76 mm 7,865 2.13E-07 335.97 0.11
0.01 gm / 1.75 mm 786 2.13E-08 33.60 0.01
0.001 gm / 0.81 mm 79 2.13E-09 3.36 0.00

Weight of pure Uranocircite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.58 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
 

Uranocircite Classification

Help on  Dana Class: Dana Class: 40.02a.03.01 (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
Help on  Strunz Class: Strunz Class: 08.EB.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.E - Uranyl Phosphates and Arsenates
  08.EB -UO2:RO4 = 1:1
 
08.EB.05 Autunite Ca(UO2)2(PO4)2•10-12(H2O) I 4/mmm 4/m 2/m 2/m
 
08.EB.05 Heinrichite Ba(UO2)2(AsO4)2•10-12(H2O) P 2/c 2/m
 
08.EB.05 Kahlerite Fe(UO2)2(AsO4)2•10-12(H2O) P 41/n 4/m
 
08.EB.05 Uranocircite Ba(UO2)2(PO4)2•12(H2O) P 4/nnc 4/m 2/m 2/m
 
08.EB.05 Novacekite Mg(UO2)2(AsO4)2•12(H2O) P 41/n 4/m
 
08.EB.05 Saleeite Mg(UO2)2(PO4)2•10(H2O) I 4/mmm 4/m 2/m 2/m
 
08.EB.05 Xiangjiangite (Fe,Al)(UO2)4(PO4)2(SO4)2(OH)•22(H2O) C 2/c or Cc Mono
 
08.EB.05 Torbernite Cu(UO2)2(PO4)2•8-12(H2O) I 4/mmm 4/m 2/m 2/m
 
08.EB.05 Uranospinite Ca(UO2)2(AsO4)2•10(H2O) P nma 2/m 2/m 2/m
 
08.EB.05 Zeunerite Cu(UO2)2(AsO4)2•10-16(H2O) P 4/nnc 4/m 2/m 2/m
 
08.EB.05 Metarauchite! Ni(UO2)2(AsO4)2•8H2O P1 1
 

Other Uranocircite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Uranocircite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - Uranium Minerals

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

Uranocircite

Ba(UO2)2(PO4)2•12(H2O)
Dana No: 40.02a.03.01 Strunz No: 08.EB.05
Locality:

 

Notes:

 

 
   
 


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