Tundrite-(Ce) Mineral Data + Say TUNDRITE-(CE)


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General Tundrite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: Na3(Ce,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)·2(H2O)
Help on Composition: Composition: Molecular Weight = 1,227.72 gm
   Sodium      5.62 %  Na    7.57 % Na2O
   Lanthanum  11.31 %  La   13.27 % La2O3
   Cerium     34.24 %  Ce   40.10 % Ce2O3
   Titanium    5.85 %  Ti    9.76 % TiO2
   Niobium     3.78 %  Nb    5.41 % Nb2O5
   Silicon     4.58 %  Si    9.79 % SiO2
   Hydrogen    0.41 %  H     3.67 % H2O
   Carbon      2.93 %  C    10.75 % CO2
   Oxygen     31.28 %  O
             ______        ______ 
             100.00 %      100.33 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3Ce3LaTi1.5Nb0.5(SiO4)2(CO3)3O4(OH)·2(H2O)
Help on IMA Status: IMA Status: Approved IMA 1963
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 20932
  PDF 25-1188
 

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Tundrite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5426:1:0.3641
Help on Cell Dimensions: Cell Dimensions: a = 7.51, b = 13.84, c = 5.04, Z = 1; alpha = 98°, beta = 70.667°, gamma = 99° V = 483.47 Den(Calc)= 4.22
Help on Crystal System: Crystal System: Triclinic - PedialH-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),
Click Here for Large Tundrite-(Ce) Structure Window Crystal Structure:

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Shumyatskaya N G , Voronkov A A , Ilyukhin V V , Belov N V , Soviet Physics - Crystallography , 21 (1976) p.399-405, Tundrite, Na2Ce2TiO2[SiO4](CO3)2 -, refinement of the crystal structure and chemical formula, Locality: Khibiny Massif, Kola Peninsula, Russia, Note: y(O11) adjusted to match reported bond lengths

 

Physical Properties of Tundrite-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: Brownish yellow, Greenish yellow.
Help on Density: Density: 3.7
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Tundrite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.091 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1914,KPDmeas= 0.2183,KC= 0.2002
Help on Optical Data: Optical Data: Biaxial (+), a=1.743, b=1.8, g=1.88, bire=0.1370
 

Calculated Properties of Tundrite-(Ce)

Help on Electron Density: Electron Density:

relectron=3.85 gm/cc
note: rTundrite-(Ce) =4.22 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01027
Boson Index = 0.98973
Help on Photoelectric: Photoelectric:

PETundrite-(Ce) = 233.60 barns/electron
U=PETundrite-(Ce) x relectron= 900.10 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 44,364.98 (Gamma Ray American Petroleum Institute Units)

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) 685.60 ±171.40 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 / 7.68 cm 1,020,362 2.76E-05 44,364.98 14.59
100 gm / 3.56 cm 102,036 2.76E-06 4,436.50 1.46
10 gm / 1.65 cm 10,204 2.76E-07 443.65 0.15
1 gm / 7.68 mm 1,020 2.76E-08 44.36 0.01
0.1 gm / 3.56 mm 102 2.76E-09 4.44 0.00
0.01 gm / 1.65 mm 10 2.76E-10 0.44 0.00
0.001 gm / 0.77 mm 1 2.76E-11 0.04 0.00

Weight of pure Tundrite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.22 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 ( 2.28 % Th) From Sum REE Elements (45.55 % REE)
 

Tundrite-(Ce) Classification

Help on  Dana Class: Dana Class: 17.1.11.1 (17)Compound Carbonates
  (17.1)with miscellaneous formulae
  (17.1.11)Dana Group
 
17.1.11.1 Tundrite-(Ce) Na3(Ce,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)·2(H2O) P1 1
 
17.1.11.2 Tundrite-(Nd) Na3(Nd,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)·2(H2O) P1 1
Help on  Strunz Class: Strunz Class: VIII/B.16-40 VIII - Silicates
  VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cationes with coordinationnumber between [8] and [12]
  VIII/B.16 - Ilmajokite - Tundrite-(Nd) series
 
VIII/B.16-20 Ilmajokite (Na,Ce,La,Ba)2TiSi3O5(OH)10·n(H2O)(?) C 2/c or Cc Mono
 
VIII/B.16-30 Sitinakite Na2K(Ti,Nb)4O4(SiO4)2(O,OH)·4(H2O) P 41/mcm 4/m 2/m 2/m
 
VIII/B.16-40 Tundrite-(Ce) Na3(Ce,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)·2(H2O) P1 1
 
VIII/B.16-50 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: 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 Tundrite-(Ce) :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (MinSocAm) 9 -Handbook of Mineralogy (UofA) 10 -MinDAT 11 -MinMax(Deutsch) 12 -MinMax(English) 13 -Mineralienatlas (Deutsch) 14 -QUT Mineral Atlas 15 - WWW-MINCRYST

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

Tundrite-(Ce)

Na3(Ce,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)·2(H2O)
Dana No: 17.1.11.1 Strunz No: VIII/B.16-40
Locality:

 

Notes:

 

 
   
 
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