Mineralogy Database

Brannerite Mineral Data

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General Brannerite Information

Help on Chemical  Formula: Chemical Formula: (U,Ca,Ce)(Ti,Fe)2O6
Help on Composition: Composition: Molecular Weight = 354.80 gm
   Calcium    3.39 %  Ca    4.74 % CaO
   Cerium     7.90 %  Ce    9.25 % Ce2O3
   Uranium   33.54 %  U    38.05 % UO2
   Titanium  20.24 %  Ti   33.77 % TiO2
   Iron       7.87 %  Fe   10.12 % FeO
   Oxygen    27.06 %  O
            ______        ______ 
            100.00 %       95.94 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: U0.5Ca0.3Ce0.2Ti1.5Fe2+0.5O6
Help on Environment: Environment: Found in gold placers.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1920
Help on Locality: Locality: Kelly Gulch, Custer County, Idaho. Stanley Basin, Wyoming. USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the American geologist, G. Branner (1850-1922).
Help on Name Pronunciation: Name Pronunciation: Brannerite + Pronunciation Say BRANNERITE
Help on Synonym: Synonym: ICSD 201342
  Orthobrannerite
  PDF 12-477
 

Brannerite Image

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  Brannerite

Comments: Black grains of brannerite with gold and other minerals.
Location: Witwatersrand field, South Africa. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Brannerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.3421:1:1.8394
Help on Cell Dimensions: Cell Dimensions: a = 8.9, b = 3.8, c = 6.99, Z = 2; beta = 104.75° V = 228.61 Den(Calc)= 5.15
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): 3.42(1), 1.903(0.8), 2.455(0.7),
 

Physical Properties of Brannerite

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Brown green, Yellow, Yellow brown, Black.
Help on Density: Density: 4.5 - 6.35, Average = 5.42
Help on Diaphaneity: Diaphaneity: Opaque to subtranslucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Highly Radioactive.
Help on Luster: Luster: Adamantine - Resinous
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: dark greenish brown
 

Optical Properties of Brannerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.094 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.153 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2456,KPDmeas= 0.2332,KC= 0.2131
Ncalc = 1.96 - 2.35
Help on Optical Data: Optical Data: Isotropic, n=2.23-2.3.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Brannerite in Air
λ R  ∑ R(λ) 
 400 nm   13.90   
 420 nm   13.50 
 440 nm   13.10 
 460 nm   12.80 
 480 nm   12.70 
 500 nm   12.50 
 520 nm   12.30 
 540 nm   12.20 
 560 nm   12.10 
 580 nm   12.00 
 600 nm   11.90 
 620 nm   11.80 
 640 nm   11.70 
 660 nm   11.70 
 680 nm   11.60 
 700 nm   11.50 
Calculated Relative Intensity Colors of Brannerite in Air
Relative
Intensity
   0%   80% 100% 160% 240% 320% 400% 480% 560% 640% 720% 730%
R                        
 

Calculated Properties of Brannerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.82 gm/cc
note: Specific Gravity of Brannerite =5.43 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEBrannerite = 904.35 barns/electron
U=PEBrannerite x relectron=4,358.53 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2,547,583.09 (Gamma Ray American Petroleum Institute Units)
Concentration of Brannerite per GRapi unit = 392.53 (PPB)

Brannerite 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) 11.94 ± 2.98 grams of pure Brannerite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1193.9 ±298.49 grams of pure Brannerite .

Estimated Radioactivity from Brannerite - 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 / 7.06 cm 60,220,724 1.63E-03 2,547,583.09 837.56
100 gm / 3.28 cm 6,022,072 1.63E-04 254,758.31 83.76
10 gm / 1.52 cm 602,207 1.63E-05 25,475.83 8.38
1 gm / 7.06 mm 60,221 1.63E-06 2,547.58 0.84
0.1 gm / 3.28 mm 6,022 1.63E-07 254.76 0.08
0.01 gm / 1.52 mm 602 1.63E-08 25.48 0.01
0.001 gm / 0.71 mm 60 1.63E-09 2.55 0.00

Weight of pure Brannerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.43 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
Estimated Thorium Activity ( 0.39 % Th) From Sum REE Elements ( 7.90 % REE)
 

Brannerite Classification

Help on  Dana Class: Dana Class: 08.03.04.01 (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 Brannerite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Brannerite :
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 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - Uranium Minerals
15 - WWW-MINCRYST

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

Brannerite

(U,Ca,Ce)(Ti,Fe)2O6
Dana No: 08.03.04.01 Strunz No: 04.DH.05
Locality:

 

Notes:

 

 
   
 


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