Tritomite-(Ce) Mineral Data

Tritomite-(Ce) Mineral Data
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General Tritomite-(Ce) Information

Help on Chemical Formula: Chemical Formula: (Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13
Help on Composition: Composition: Molecular Weight = 787.79 gm
   Calcium    10.17 %  Ca   14.24 % CaO
   Lanthanum  17.63 %  La   20.68 % La2O3
   Cerium     26.68 %  Ce   31.25 % Ce2O3
   Yttrium     3.95 %  Y     5.02 % Y2O3
   Thorium     4.42 %  Th    5.03 % ThO2
   Silicon     8.91 %  Si   19.07 % SiO2
   Boron       0.69 %  B     2.21 % B2O3
   Hydrogen    0.38 %  H     3.43 % H2O
   Oxygen     22.34 %  O
   Fluorine    4.82 %  F     4.82 % F
                -   %   F    -2.03 % -O=F2    
             ______        ______ 
             100.00 %      103.71 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: 5(Ce0.3)5(Ca0.4)5(La0.2)5(Y0.07)5(Th0.03)Si2.5B0.5O8(OH)3F2
Help on Environment: Environment: Nepheline Syenite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1849
Help on Locality: Locality: Laven Island, Langesundfiord district, near Brevik, southern Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "three" and "to cut," in allusion to the trihedral cavities left in the host rock by the crystals.
Help on Name Pronunciation: Name Pronunciation: Tritomite-(Ce) + Pronunciation Say TRITOMITE-(CE)
Help on Synonym: Synonym: Tritomite
 

Tritomite-(Ce) Image

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Tritomite-(Ce)

Comments: Dark brown, vitreous grains of tritomite-(Ce) in pegmatite matrix.
Location: Langesundsfjorden, Larvik, Vestfold, Norway. Scale: Crystal size 1 cm.
© Tom Loomis / Dakota Matrix

Tritomite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.73582
Help on Cell Dimensions: Cell Dimensions: a = 9.35, c = 6.88, Z = 2; V = 520.89 Den(Calc)= 5.02
Help on Crystal System: Crystal System: Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.81(1), 1.84(0.4), 3.44(0.4),
 

Physical Properties of Tritomite-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark brown.
Help on Density: Density: 4.2
Help on Diaphaneity: Diaphaneity: Translucent to Subopaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Pyramidal - Crystals are shaped like pyramids.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous - Resinous
 

Optical Properties of Tritomite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.073 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.225 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1401,KPDmeas= 0.1675,KC= 0.1808
Ncalc = 1.76 - 1.91
Help on Optical Data: Optical Data: Isotropic, n=1.65-1.757.
 

Calculated Properties of Tritomite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.81 gm/cc
note: Specific Gravity of Tritomite-(Ce) =4.20 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0059314927
Boson Index = 0.9940685073
Help on Photoelectric: Photoelectric: PETritomite-(Ce) = 328.36 barns/electron
U=PETritomite-(Ce) x relectron=1,252.21 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 85,580.96 (Gamma Ray American Petroleum Institute Units)
Concentration of Tritomite-(Ce) per GRapi unit = 11.68 (PPM)

Tritomite-(Ce) 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) 355.41 ± 88.85 grams of pure Tritomite-(Ce) .

Estimated Radioactivity from Tritomite-(Ce) - weak
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 / 7.69 cm 1,979,331 5.35E-05 85,580.96 28.14
100 gm / 3.57 cm 197,933 5.35E-06 8,558.10 2.81
10 gm / 1.66 cm 19,793 5.35E-07 855.81 0.28
1 gm / 7.69 mm 1,979 5.35E-08 85.58 0.03
0.1 gm / 3.57 mm 198 5.35E-09 8.56 0.00
0.01 gm / 1.66 mm 20 5.35E-10 0.86 0.00
0.001 gm / 0.77 mm 2 5.35E-11 0.09 0.00

Weight of pure Tritomite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.20 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
 

Tritomite-(Ce) Classification
Help on Dana Class: Dana Class: 54.02.05.01 (54)Nesosilicate Borosilicates and Some Beryllosilicates
  (54.02)with B in [4] coordination
  (54.02.05)Tritomite group
 
54.02.05.01 Tritomite-(Ce) (Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13 P 63/m 6/m
 
54.02.05.02 Tritomite-(Y) (Y,Ca,La,Fe)5(Si,B,Al)3(O,OH,F)13(?) P 63/m 6/m
 
54.02.05.03 Melanocerite-(Ce) (Ce,Th,Ca)5(Si,B)3O12(OH,F)•n(H2O)(?) Unk (HEX-R) Trig
Help on Strunz Class: Strunz Class: 09.AH.30 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AH -Nesosilicates with CO3, SO4, PO4, etc.
 
09.AH.30 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 63/m 6/m
 
09.AH.30 Tritomite-(Ce) (Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13 P 63/m 6/m
 
09.AH.30 Tritomite-(Y) (Y,Ca,La,Fe)5(Si,B,Al)3(O,OH,F)13(?) P 63/m 6/m
 

Other Tritomite-(Ce) Information
Help on References: References: NAME( Dana8) 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 Tritomite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - Uranium Minerals

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Print or Cut-and-Paste your Tritomite-(Ce) Specimen Label here :

Tritomite-(Ce)

(Ce,La,Ca,Y,Th)5(Si,B)3(O,OH,F)13
Dana No: 54.02.05.01 Strunz No: 09.AH.30
Locality:

 

Notes: