Tundrite-(Ce) Mineral Data (original) (raw)

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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Click Here for Larger Tundrite-(Ce) Image 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 - PinacoidalH-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),

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Help on Above

| | 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:

{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

SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor 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: