Tundrite-(Ce) Mineral Data

Tundrite-(Ce) Mineral Data +

[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Dan Weinrich Auctions
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!

General Tundrite-(Ce) Information

Chemical Formula:

Na3(Ce,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)·2(H2O)

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

Empirical Formula:

Na₃Ce₃LaTi_1.5Nb_0.5(SiO₄)₂(CO₃)₃O₄(OH)·2(H₂O)

IMA Status:

Approved IMA 1963

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 20932

PDF 25-1188

Search for Tundrite-(Ce) Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Tundrite-(Ce) Crystallography

Axial Ratios:

a:b:c =0.5426:1:0.3641

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

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.72(1), 2.78(1), 3.06(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
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)

Cleavage:

None

Color:

Brownish yellow, Greenish yellow.

Density:

3.7

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Tundrite-(Ce)

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

Optical Data:

Biaxial (+), a=1.743, b=1.8, g=1.88, bire=0.1370

Calculated Properties of Tundrite-(Ce)

Electron Density:

r_electron=3.85 gm/cc
note: r_{Tundrite-(Ce)}=4.22 gm/cc.

Fermion Index

Fermion Index = 0.01027
Boson Index = 0.98973

Photoelectric:

PE_{Tundrite-(Ce)}= 233.60 barns/electron
U=PE_{Tundrite-(Ce)} x r_electron= 900.10 barns/cc.

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

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

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

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Tundrite-(Ce) using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Tundrite-(Ce) :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Tundrite-(Ce) Mineral Data :

Ask about Tundrite-(Ce) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: