Mineralogy Database

Thorutite Mineral Data

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General Thorutite Information

Help on Chemical  Formula: Chemical Formula: (Th,U,Ca)Ti2(O,OH)6
Help on Composition: Composition: Molecular Weight = 390.82 gm
   Calcium    2.05 %  Ca    2.87 % CaO
   Thorium   23.75 %  Th   27.02 % ThO2
   Uranium   24.36 %  U    27.64 % UO2
   Titanium  24.50 %  Ti   40.88 % TiO2
   Hydrogen   0.77 %  H     6.91 % H2O
   Oxygen    24.56 %  O
            ______        ______ 
            100.00 %      105.32 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Th0.4U0.4Ca0.2Ti2O3(OH)3
Help on Environment: Environment: In microcline veins cutting a nephelene syenite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1958
Help on Locality: Locality: Somewhere in Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition (Thorium, rutile).
Help on Name Pronunciation: Name Pronunciation: Thorutite + Pronunciation Say THORUTITE
Help on Synonym: Synonym: ICSD 14341
  PDF 19-1351
 

Thorutite Image

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  Thorutite

Comments: Spherical aggregate of black thorutite.
Location: Brumado, Brazil. Scale: Sphere Diameter 0.25 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Thorutite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.5685:1:1.8399
Help on Cell Dimensions: Cell Dimensions: a = 9.822, b = 3.824, c = 7.036, Z = 2; beta = 118.83° V = 231.51 Den(Calc)= 5.61
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): 3.17(1), 1.695(0.85), 1.728(0.85),
 

Physical Properties of Thorutite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black, Dark brown.
Help on Density: Density: 5.82
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 4.5-5.5 - Near Apatite
Help on Luster: Luster: Resinous
Help on Streak: Streak: light brown
 

Optical Properties of Thorutite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.281 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.254 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1961,KPDmeas= 0.189,KC= 0.2629
Ncalc = 2.48 - 2.53
Help on Optical Data: Optical Data: Isotropic, n=2.1.
 

Calculated Properties of Thorutite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.93 gm/cc
note: Specific Gravity of Thorutite =5.61 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEThorutite =1,201.59 barns/electron
U=PEThorutite x relectron=5,926.41 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2,271,070.74 (Gamma Ray American Petroleum Institute Units)
Concentration of Thorutite per GRapi unit = 440.32 (PPB)

Thorutite 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) 13.39 ± 3.35 grams of pure Thorutite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1339.3 ±334.83 grams of pure Thorutite .

Estimated Radioactivity from Thorutite - 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 / 6.98 cm 54,247,096 1.47E-03 2,271,070.74 746.65
100 gm / 3.24 cm 5,424,710 1.47E-04 227,107.07 74.67
10 gm / 1.50 cm 542,471 1.47E-05 22,710.71 7.47
1 gm / 6.98 mm 54,247 1.47E-06 2,271.07 0.75
0.1 gm / 3.24 mm 5,425 1.47E-07 227.11 0.07
0.01 gm / 1.50 mm 542 1.47E-08 22.71 0.01
0.001 gm / 0.70 mm 54 1.47E-09 2.27 0.00

Weight of pure Thorutite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.61 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
 

Thorutite Classification

Help on  Dana Class: Dana Class: 08.03.04.02 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.03)where A (B2O6)
  (08.03.04)Dana Group
 
08.03.04.01 Brannerite (U,Ca,Ce)(Ti,Fe)2O6 C 2/m 2/m
 
08.03.04.02 Thorutite (Th,U,Ca)Ti2(O,OH)6 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.DH.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DH -With large (� medium-sized) cations; sheets of edge-sharing octahedra
 
04.DH.05 Brannerite (U,Ca,Ce)(Ti,Fe)2O6 C 2/m 2/m
 
04.DH.05 Orthobrannerite UUTi4O12(OH)2 P 2122 2 2 2
 
04.DH.05 Thorutite (Th,U,Ca)Ti2(O,OH)6 C 2/m 2/m
 

Other Thorutite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Thorutite :
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
16 - WWW-MINCRYST

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

Thorutite

(Th,U,Ca)Ti2(O,OH)6
Dana No: 08.03.04.02 Strunz No: 04.DH.05
Locality:

 

Notes:

 

 
   
 


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