Tundrite-(Nd) Mineral Data

General Tundrite-(Nd) Information

Chemical Formula: Na3(Nd,La)4(Ti,Nb)2(SiO4)2(CO3)3O4(OH)•2(H2O) Composition: Molecular Weight = 1,240.10 gm    Sodium      5.56 %  Na    7.50 % Na₂O    Lanthanum  11.20 %  La   13.14 % La₂O₃    Titanium    5.79 %  Ti    9.66 % TiO₂    Niobium     3.75 %  Nb    5.36 % Nb₂O₅    Silicon     4.53 %  Si    9.69 % SiO₂    Hydrogen    0.41 %  H     3.63 % H₂O    Carbon      2.91 %  C    10.65 % CO₂    Neodymium  34.89 %  Nd   40.70 % Nd₂O₃    Oxygen     30.96 %  O              ______        ______               100.00 %      100.32 % = TOTAL OXIDE Empirical Formula: Na₃Nd₃LaTi_1.5Nb_0.5(SiO₄)₂(CO₃)₃O₄(OH)·2(H₂O) Environment: Pegmatite veins associated with layered nepheline syenite. IMA Status: Approved IMA 1968 Locality: Ilimaussaq intrusion, at Kringlerne, Kangerdluarssuk Plateau, southern Greenland. Link to MinDat.org Location Data. Name Origin: Named for its relation to tundrite-(Ce), and its neodymium content. Name Pronunciation: Tundrite-(Nd)  

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Tundrite-(Nd) 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)= 4.26 Crystal System: Triclinic - PedialH-M Symbol (1) Space Group: P1  

Physical Properties of Tundrite-(Nd)

Cleavage: {???} Good Color: Yellow, Greenish yellow. Density: 3.7 Hardness: 3 - Calcite Luster: Vitreous (Glassy) Streak: white  

Optical Properties of Tundrite-(Nd)

Optical Data: NCalc= 1.83 - from Gladstone-Dale relationship (KC = 0.1967) where Ncalc=Dcalc*KC+1
NCalc= 1.73 - from Gladstone-Dale relationship (KC = 0.1967) where Ncalc=Dmeas*KC+1  

Calculated Properties of Tundrite-(Nd)

Electron Density: Bulk Density (Electron Density)=3.87 gm/cc
note: Specific Gravity of Tundrite-(Nd) =4.24 gm/cc.
Fermion Index: Fermion Index = 0.08
Boson Index = 0.92 Photoelectric: PE_{Tundrite-(Nd)} = 260.03 barns/electron
U=PE_{Tundrite-(Nd)} x r_electron=1,007.30 barns/cc.
Radioactivity:

GRapi = 44,921.97 (Gamma Ray American Petroleum Institute Units)
Concentration of Tundrite-(Nd) per GRapi unit = 22.26 (PPM)

Tundrite-(Nd) 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) 677.10 ±169.27 grams of pure Tundrite-(Nd) .

Estimated Radioactivity from Tundrite-(Nd) - weak

Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.67 cm	1,032,533	2.79E-05	44,921.97	14.77
100 gm / 3.56 cm	103,253	2.79E-06	4,492.20	1.48
10 gm / 1.65 cm	10,325	2.79E-07	449.22	0.15
1 gm / 7.67 mm	1,033	2.79E-08	44.92	0.01
0.1 gm / 3.56 mm	103	2.79E-09	4.49	0.00
0.01 gm / 1.65 mm	10	2.79E-10	0.45	0.00
0.001 gm / 0.77 mm	1	2.79E-11	0.04	0.00

Weight of pure Tundrite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.24 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 ( 2.30 % Th) From Sum REE Elements (46.10 % REE)

 

Tundrite-(Nd) Classification

Dana Class: 17.01.11.02 (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

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-(Nd) Information

References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) See Also: Links to other databases for Tundrite-(Nd) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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