Mineralogy Database

Orthobrannerite Mineral Data

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General Orthobrannerite Information

Help on Chemical  Formula: Chemical Formula: U++++U++++++Ti4O12(OH)2
Help on Composition: Composition: Molecular Weight = 893.59 gm
   Uranium   53.28 %  U    30.22 % UO2 / 32.01 % UO3
   Titanium  21.43 %  Ti   35.76 % TiO2
   Hydrogen   0.23 %  H     2.02 % H2O
   Oxygen    25.07 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: UUTi4O12(OH)2
Help on Environment: Environment: Weathered biotite pyroxene syenite. Dimorphous with brannerite (?).
Help on IMA Status: IMA Status: Approved IMA 1978
Help on Locality: Locality: Undefined localities in Yunan and Szechwan Provinces, China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as an ORTHOrhombic dimorph of brannerite.
Help on Name Pronunciation: Name Pronunciation: Orthobrannerite + Pronunciation Say ORTHOBRANNERITE
 

Orthobrannerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6315:1:0.5424
Help on Cell Dimensions: Cell Dimensions: a = 7.37, b = 11.67, c = 6.33, Z = 2; V = 544.43 Den(Calc)= 5.45
Help on Crystal System: Crystal System: Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 2122
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.17(1), 1.659(0.9), 2.45(0.9),
 

Physical Properties of Orthobrannerite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brownish green, Black.
Help on Density: Density: 5.46
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Adamantine
Help on Streak: Streak: brownish yellow
 

Optical Properties of Orthobrannerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.129 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.131 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2437,KPDmeas= 0.2432,KC= 0.2154
Ncalc = 2.17 - 2.18
Help on Optical Data: Optical Data: Isotropic, n=2.328.
 

Calculated Properties of Orthobrannerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.72 gm/cc
note: Specific Gravity of Orthobrannerite =5.46 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEOrthobrannerite =1,402.97 barns/electron
U=PEOrthobrannerite x relectron=6,617.94 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,923,184.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Orthobrannerite per GRapi unit = 254.89 (PPB)

Orthobrannerite 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) 7.75 ± 1.94 grams of pure Orthobrannerite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 775.31 ±193.83 grams of pure Orthobrannerite .

Estimated Radioactivity from Orthobrannerite - 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 / 7.05 cm 95,362,298 2.58E-03 3,923,184.27 1,289.81
100 gm / 3.27 cm 9,536,230 2.58E-04 392,318.43 128.98
10 gm / 1.52 cm 953,623 2.58E-05 39,231.84 12.90
1 gm / 7.05 mm 95,362 2.58E-06 3,923.18 1.29
0.1 gm / 3.27 mm 9,536 2.58E-07 392.32 0.13
0.01 gm / 1.52 mm 954 2.58E-08 39.23 0.01
0.001 gm / 0.70 mm 95 2.58E-09 3.92 0.00

Weight of pure Orthobrannerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.46 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
 

Orthobrannerite Classification

Help on  Dana Class: Dana Class: 08.02.07.01 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.02)where (A)2 (B2O6) (O,OH,F)
  (08.02.07)Dana Group
 
08.02.07.01 Orthobrannerite UUTi4O12(OH)2 P 2122 2 2 2
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 Orthobrannerite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Orthobrannerite :
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

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

Orthobrannerite

U++++U++++++Ti4O12(OH)2
Dana No: 08.02.07.01 Strunz No: 04.DH.05
Locality:

 

Notes:

 

 
   
 


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