Mineralogy Database

Uranophane Mineral Data

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General Uranophane Information

Help on Chemical  Formula: Chemical Formula: Ca(UO2)2SiO3(OH)2•5(H2O)
Help on Composition: Composition: Molecular Weight = 586.36 gm
   Calcium    6.84 %  Ca    9.56 % CaO
   Uranium   40.59 %  U    46.05 % UO2
   Silicon    9.58 %  Si   20.49 % SiO2
   Hydrogen   2.06 %  H    18.43 % H2O
   Oxygen    40.93 %  O
            ______        ______ 
            100.00 %       94.54 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaH2(SiO4)2(UO2)•5(H2O)
Help on Environment: Environment: Alteration product of gummite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1853
Help on Locality: Locality: Oberpfalz, Bavaria. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From uran and phanos - "to appear."
Help on Name Pronunciation: Name Pronunciation: Uranophane + Pronunciation Say URANOPHANE
Help on Synonym: Synonym: ICSD 63029
  PDF 39-1360
  Uranotile
 

Uranophane Image

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  Uranophane

Comments: Bright yellow crystals of uranophane with black uraninite.
Location: Teofilo Otoni, Minas Gerais, Brazil. Scale: Picture size 3.5 mm.
© Paul M. Schumacher

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  Uraninite   Uranophane

Comments: Sharp, cubic crystals of black uraninite on yellow uranophane.
Location: Teofilo Otoni, Minas Gerais, Brazil. Scale: Picture size 1.5 mm.
© Paul M. Schumacher

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  Uranophane

Comments: Yellow uranophane acicular crystal tufts.
Location: Faraday Mine, Bancroft, Ontario, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Uranophane Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.251:1:0.9446
Help on Cell Dimensions: Cell Dimensions: a = 15.87, b = 7.05, c = 6.66, Z = 3; beta = 97.25° V = 739.19 Den(Calc)= 3.95
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.88(1), 3.94(0.9), 2.99(0.8),
 

Physical Properties of Uranophane

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Yellow, Yellow brown, Yellow green, Yellow orange, Light yellow.
Help on Density: Density: 3.9
Help on Diaphaneity: Diaphaneity: Translucent to subtranslucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent, Short UV=weak yellow-green, Long UV=weak yellow-green.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellowish white
 

Optical Properties of Uranophane

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.026 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1669,KPDmeas= 0.1691,KC= 0.1714
Ncalc = 1.67 - 1.68
Help on Optical Data: Optical Data: Biaxial (-), a=1.643, b=1.666, g=1.669, bire=0.0260, 2V(Calc)=38, 2V(Meas)=32-45. Dispersion relatively strong.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
 

Calculated Properties of Uranophane

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.62 gm/cc
note: Specific Gravity of Uranophane =3.90 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0076882409
Boson Index = 0.9923117591
Help on Photoelectric: Photoelectric: PEUranophane = 994.08 barns/electron
U=PEUranophane x relectron=3,596.79 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,210,165.80 (Gamma Ray American Petroleum Institute Units)
Concentration of Uranophane per GRapi unit = 311.51 (PPB)

Uranophane 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) 9.48 ± 2.37 grams of pure Uranophane .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 947.51 ±236.88 grams of pure Uranophane .

Estimated Radioactivity from Uranophane - 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 / 7.88 cm 72,663,329 1.96E-03 3,210,165.80 1,055.40
100 gm / 3.66 cm 7,266,333 1.96E-04 321,016.58 105.54
10 gm / 1.70 cm 726,633 1.96E-05 32,101.66 10.55
1 gm / 7.88 mm 72,663 1.96E-06 3,210.17 1.06
0.1 gm / 3.66 mm 7,266 1.96E-07 321.02 0.11
0.01 gm / 1.70 mm 727 1.96E-08 32.10 0.01
0.001 gm / 0.79 mm 73 1.96E-09 3.21 0.00

Weight of pure Uranophane in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.90 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
 

Uranophane Classification

Help on  Dana Class: Dana Class: 53.03.01.02 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations
  (53.03)with (UO2)
  (53.03.01)Uranophane group
 
53.03.01.01 Kasolite Pb(UO2)SiO4•(H2O) P 21/a 2/m
 
53.03.01.02 Uranophane Ca(UO2)2SiO3(OH)2•5(H2O) P 21 2
 
53.03.01.03 Sklodowskite (H3O)2Mg(UO2)2(SiO4)2•4(H2O) C 2/m 2/m
 
53.03.01.04 Cuprosklodowskite Cu[(UO2)(SiO2OH)]2•6(H2O) P1 1
 
53.03.01.05 Boltwoodite HK(UO2)(SiO4)•1.5(H2O) P 21 2
 
53.03.01.06 Natroboltwoodite (H3O)(Na,K)(UO2)SiO4•(H2O) P 212121 2 2 2
 
53.03.01.07 Oursinite (Co,Mg)(H3O)2[(UO2)SiO4]2•3(H2O) Aba2,Abam Ortho
 
53.03.01.08 Swamboite UH6(UO2)6(SiO4)6•30(H2O) P 21/a 2/m
 
53.03.01.09 Uranophane-beta Ca[(UO2)SiO3(OH)]2•(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.AK.15 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AK -Uranyl neso- and polysilicates
 
09.AK.15 Boltwoodite HK(UO2)(SiO4)•1.5(H2O) P 21 2
 
09.AK.15 Kasolite Pb(UO2)SiO4•(H2O) P 21/a 2/m
 
09.AK.15 Uranophane Ca(UO2)2SiO3(OH)2•5(H2O) P 21 2
 
09.AK.15 Natroboltwoodite (H3O)(Na,K)(UO2)SiO4•(H2O) P 212121 2 2 2
 

Other Uranophane Information

Help on See Also: See Also: Links to other databases for Uranophane :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Franklin Minerals(Dunn)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Uranium Minerals
17 - Uranium Minerals
18 - WWW-MINCRYST
19 - theimage

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

Uranophane

Ca(UO2)2SiO3(OH)2•5(H2O)
Dana No: 53.03.01.02 Strunz No: 09.AK.15
Locality:

 

Notes:

 

 


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