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Tundrite-(Ce) Mineral Data

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General Tundrite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: Na2Ce2TiO2(SiO4)(CO3)2
Help on Composition: Composition: Molecular Weight = 614.89 gm
   Sodium          7.13 %  Na    9.61 % Na2O
   Calcium         0.25 %  Ca    0.36 % CaO
   Lanthanum      14.03 %  La   16.45 % La2O3
   Cerium         23.47 %  Ce   27.49 % Ce2O3
   Praeseodymium   1.86 %  Pr    2.17 % Pr2O3
   Samarium        0.34 %  Sm    0.40 % Sm2O3
   Titanium        6.81 %  Ti   11.37 % TiO2
   Niobium         1.65 %  Nb    2.36 % Nb2O5
   Silicon         4.44 %  Si    9.49 % SiO2
   Hydrogen        0.04 %  H     0.37 % H2O
   Carbon          3.86 %  C    14.16 % CO2
   Neodymium       5.37 %  Nd    6.27 % Nd2O3
   Oxygen         30.75 %  O
                 ______        ______ 
                 100.00 %      100.47 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.9Ca0.03Ce1.03La0.62Nd0.22Pr0.08Sm0.01Ti0.87Nb0.1O2H0.25(SiO4)0.972(CO3)0.98
Help on Environment: Environment: Occurs in nepheline syenite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1963
Help on Locality: Locality: Mt. Nepkha, Lovozero tundra, Kola Peninsula, Russa and Mont Saint-Hilaire quarry, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Russian locality.
Help on Name Pronunciation: Name Pronunciation: Tundrite-(Ce) Say TUNDRITE-(CE)
Help on Synonym: Synonym: ICSD 20932
  PDF 25-1188
 

Tundrite-(Ce) Image

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  Tundrite-(Ce)

Comments: Radiating group of tundrite-(Ce) crystals in matrix. (CanMin, v46:415).
Location: Mont Saint-Hilaire, Quebec. Scale: Crystal size 25 mm.
© Willow Wight/Canadian Mineralogist

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  Tundrite-(Ce)

Comments: Prismatic, yellowish, terminated tundrite-(Ce) crystal (CanMin, v46:415).
Location: Mont Saint-Hilaire, Quebec. Scale: Crystal size 7 mm.
© Quintin Wight/Canadian Mineralogist

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  Tundrite-(Ce)

Comments: Brown elongated bladed tundrite-(Ce) crystals associated with white orthoclase and black amphibole.
Location: Barkeviksjaer, Norway. Scale: See Image.
© Rruff Database

Tundrite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5427:1:0.3601
Help on Cell Dimensions: Cell Dimensions: a = 7.5702, b = 13.949, c = 5.0235, Z = 2; alpha = 100.19°, beta = 70.88°, gamma = 101.26° V = 483.80 Den(Calc)= 4.22
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.72(1), 2.78(1), 3.06(0.8),
 

Physical Properties of Tundrite-(Ce)

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Brownish yellow, Greenish yellow.
Help on Density: Density: 4.08
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Tundrite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1928,KPDmeas= 0.198,KC= 0.1969
Ncalc = 1.8 - 1.83
Help on Optical Data: Optical Data: Biaxial (+), a=1.743, b=1.8, g=1.88, bire=0.1370
Help on Pleochroism (y): Pleochroism (y): pale yellow.
Help on Pleochroism (z): Pleochroism (z): greenish yellow.
 

Calculated Properties of Tundrite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.72 gm/cc
note: Specific Gravity of Tundrite-(Ce) =4.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PETundrite-(Ce) = 232.37 barns/electron
U=PETundrite-(Ce) x relectron= 864.18 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 43,839.44 (Gamma Ray American Petroleum Institute Units)
Concentration of Tundrite-(Ce) per GRapi unit = 22.81 (PPM)

Tundrite-(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) 693.82 ±173.45 grams of pure Tundrite-(Ce) .

Estimated Radioactivity from Tundrite-(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 / 7.76 cm 1,009,988 2.73E-05 43,839.44 14.41
100 gm / 3.60 cm 100,999 2.73E-06 4,383.94 1.44
10 gm / 1.67 cm 10,100 2.73E-07 438.39 0.14
1 gm / 7.76 mm 1,010 2.73E-08 43.84 0.01
0.1 gm / 3.60 mm 101 2.73E-09 4.38 0.00
0.01 gm / 1.67 mm 10 2.73E-10 0.44 0.00
0.001 gm / 0.78 mm 1 2.73E-11 0.04 0.00

Weight of pure Tundrite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.08 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 ( 2.25 % Th) From Sum REE Elements (45.07 % REE)
 

Tundrite-(Ce) Classification

Help on  Dana Class: Dana Class: 17.01.11.01 (17)Compound Carbonates
  (17.01)with miscellaneous formulae
  (17.01.11)Tundrite Group
 
17.01.11.01 Tundrite-(Ce) Na2Ce2TiO2(SiO4)(CO3)2 P1 1
 
17.01.11.02 Tundrite-(Nd) Na3(Nd,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)•2(H2O) P1 1
Help on  Strunz Class: Strunz Class: 09.AH.10 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AH -Nesosilicates with CO3, SO4, PO4, etc.
 
09.AH.10 Tundrite-(Ce) Na2Ce2TiO2(SiO4)(CO3)2 P1 1
 
09.AH.10 Tundrite-(Nd) Na3(Nd,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)•2(H2O) P1 1
 

Other Tundrite-(Ce) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8; AmMin v93:1946) OPTIC PROP.(AmMin v93:1946)
Help on See Also: See Also: Links to other databases for Tundrite-(Ce) :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Tundrite-(Ce)

Na2Ce2TiO2(SiO4)(CO3)2
Dana No: 17.01.11.01 Strunz No: 09.AH.10
Locality:

 

Notes:

 

 
   
 


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