Mineralogy Database

Studtite Mineral Data

Search Webmineral :

General Studtite Information

Help on Chemical  Formula: Chemical Formula: [(UO2)O2(H2O)2](H2O)2
Help on Composition: Composition: Molecular Weight = 374.09 gm
   Uranium   63.63 %  U
   Hydrogen   2.16 %  H
   Oxygen    34.22 %  O
            100.00 % 
Help on Empirical Formula: Empirical Formula: (UO2)O2•4(H2O)
Help on Environment: Environment: Secondary uranium mineral containing peroxide formed by the alpha-radiolysis of water during formation. May also form in spent-fission fuel elements.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1947
Help on Locality: Locality: Zaire at Shinkolobwe, Shaba. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Franz Edward Studt, Belgian prospector and geologist, author of the first geological map (1913) of Shava, Zaire.
Help on Name Pronunciation: Name Pronunciation: Studtite Say STUDTITE

Studtite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Studtite   Billietite

Comments: Acicular, white sprays of studtite crystals on yellow, tabular billietite.
Location: Shinkolobwe mine, Tantara, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Studtite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.0931:1:1.2539
Help on Cell Dimensions: Cell Dimensions: a = 14.068, b = 6.721, c = 8.428, Z = 4; beta = 123.356° V = 665.61 Den(Calc)= 3.73
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.92(1), 3.4(0.8), 2.96(0.6),

Physical Properties of Studtite

Help on Cleavage: Cleavage: None
Help on Color: Color: Yellow, White yellow.
Help on Density: Density: 3.64
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 1-2 - Between Talc and Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Streak: Streak: light yellow

Optical Properties of Studtite

Help on Optical Data: Optical Data: Biaxial (+), a=1.545, b=1.555, g=1.68, bire=0.1350

Calculated Properties of Studtite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.27 gm/cc
note: Specific Gravity of Studtite =3.73 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.004748768
Boson Index = 0.995251232
Help on Photoelectric: Photoelectric: PEStudtite =1,646.52 barns/electron
U=PEStudtite x relectron=5,384.87 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,755,438.79 (Gamma Ray American Petroleum Institute Units)
Concentration of Studtite per GRapi unit = 210.29 (PPB)

Studtite 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) 6.40 ± 1.60 grams of pure Studtite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 639.62 ±159.90 grams of pure Studtite .

Estimated Radioactivity from Studtite - very strong
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 8.00 cm 113,896,239 3.08E-03 4,755,438.79 1,563.43
100 gm / 3.71 cm 11,389,624 3.08E-04 475,543.88 156.34
10 gm / 1.72 cm 1,138,962 3.08E-05 47,554.39 15.63
1 gm / 8.00 mm 113,896 3.08E-06 4,755.44 1.56
0.1 gm / 3.71 mm 11,390 3.08E-07 475.54 0.16
0.01 gm / 1.72 mm 1,139 3.08E-08 47.55 0.02
0.001 gm / 0.80 mm 114 3.08E-09 4.76 0.00

Weight of pure Studtite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.73 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

Studtite Classification

Help on  Dana Class: Dana Class: (05)Oxides Containing Uranium and Thorium
  (05.03)with a cation charge of 8+ (AO4) and hydrated
  (05.03.01)Studtite Group Studtite [(UO2)O2(H2O)2](H2O)2 C 2/m 2/m Metastudtite UO4•2(H2O) I mmm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.GA.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.G - Uranyl Hydroxides
  04.GA -Without additional cations
04.GA.15 Metastudtite UO4•2(H2O) I mmm 2/m 2/m 2/m
04.GA.15 Studtite [(UO2)O2(H2O)2](H2O)2 C 2/m 2/m

Other Studtite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8, AmMin, v 88, p 1165) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Studtite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

Search for Studtite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Studtite :

Ask about Studtite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

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


Dana No: Strunz No: 04.GA.15





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.