Shabaite-(Nd) Mineral Data

Shabaite-(Nd) Mineral Data +

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General Shabaite-(Nd) Information

Chemical Formula:

Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2·6(H2O)

Composition:

Molecular Weight = 969.96 gm

Calcium 4.13 % Ca 5.78 % CaO

Samarium 7.75 % Sm 8.99 % Sm₂O₃

Yttrium 2.29 % Y 2.91 % Y₂O₃

Uranium 24.54 % U 27.84 % UO₂

Hydrogen 1.45 % H 13.00 % H₂O

Carbon 4.95 % C 18.15 % CO₂

Neodymium 18.59 % Nd 21.68 % Nd₂O₃

Oxygen 36.29 % O

______ ______

100.00 % 98.35 % = TOTAL OXIDE

Empirical Formula:

CaNd_1.25Sm_0.5Y_0.25(UO₂)(CO₃)₄(OH)₂·6(H₂O)

Environment:

Cu-Co deposit.

IMA Status:

Approved IMA 1989

Locality:

Kamoto East, 5 km W of Kolwezi, Shaba, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

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Shabaite-(Nd) Crystallography

Axial Ratios:

a:b:c =0.2869:1:0.2597

Cell Dimensions:

a = 9.208, b = 32.09, c = 8.335, Z = 5; beta = 90.3° V = 2,462.83 Den(Calc)= 3.27

Crystal System:

MonoclinicSpace Group: P 2,P 2/m,Pm

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

By Intensity(I/I_o): 15.9(1), 7.31(0.7), 3.072(0.6),

Physical Properties of Shabaite-(Nd)

Cleavage:

[???] Perfect

Color:

Pale greenish yellow, Light yellow.

Density:

3.13

Diaphaniety:

Translucent to Opaque

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

2.5 - Finger Nail

Luster:

Pearly

Streak:

white

Optical Properties of Shabaite-(Nd)

Gladstone-Dale:

CI meas= -0.088 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.041 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1757,KPDmeas= 0.1836,KC= 0.1688

Optical Data:

Biaxial (-), a=1.534, b=1.59, g=1.6, bire=0.0660, 2V(Calc)=44, 2V(Meas)=44.

Pleochroism (x):

none.

Pleochroism (y):

none.

Pleochroism (z):

none.

Calculated Properties of Shabaite-(Nd)

Electron Density:

r_electron=2.98 gm/cc
note: r_{Shabaite-(Nd)}=3.27 gm/cc.

Fermion Index

Fermion Index = 0.06293
Boson Index = 0.93707

Photoelectric:

PE_{Shabaite-(Nd)}= 771.58 barns/electron
U=PE_{Shabaite-(Nd)} x r_electron=2,298.17 barns/cc.

Radioactivity:

GRapi = 1,931,330.98 (Gamma Ray American Petroleum Institute Units)

Shabaite-(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) 15.75 ± 3.94 grams of pure Shabaite-(Nd) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1574.9 ±393.73 grams of pure Shabaite-(Nd) .

**Estimated Radioactivity from Shabaite-(Nd)** - very strong
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 / 8.36 cm	44,526,785	1.20E-03	1,931,330.98	634.96
100 gm / 3.88 cm	4,452,679	1.20E-04	193,133.10	63.50
10 gm / 1.80 cm	445,268	1.20E-05	19,313.31	6.35
1 gm / 8.36 mm	44,527	1.20E-06	1,931.33	0.63
0.1 gm / 3.88 mm	4,453	1.20E-07	193.13	0.06
0.01 gm / 1.80 mm	445	1.20E-08	19.31	0.01
0.001 gm / 0.84 mm	45	1.20E-09	1.93	0.00

Weight of pure Shabaite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.27 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 ( 1.32 % Th) From Sum REE Elements (26.34 % REE)

Shabaite-(Nd) Classification

Dana Class:

16b.1.5.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.1)where (A)m (B)n (XO3)p Zq, with (m+n):p=1:1

(16b.1.5)Dana Group

16b.1.5.1 Shabaite-(Nd) Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2·6(H2O) P 2,P 2/m,Pm Mono

Strunz Class:

V/F.06-10 V - Nitrates, Carbonates and Borates

V/F - Uranylcarbonates ([UO2]4+ - [CO3]2-)

V/F.06 - Astrocyanite-(Ce) - Bijvoetite-(Y) series

V/F.06-05 Astrocyanite-(Ce) Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2·1.5(H2O) P 6/mmm 6/m 2/m 2/m

V/F.06-10 Shabaite-(Nd) Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2·6(H2O) P 2,P 2/m,Pm Mono

V/F.06-20 Kamotoite-(Y) (Y,Nd,Gd)2U4(CO3)3O12·14.5(H2O) P 2₁/a 2/m

V/F.06-30 Bijvoetite-(Y) (Y,REE)8(H2O)25(UO2)16O8(OH)8(CO3)16·14(H2O) B1211 (pseudo ORTHO) 2

Other Shabaite-(Nd) Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Shabaite-(Nd) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Shabaite-(Nd)

Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2·6(H2O)
Dana No: 16b.1.5.1 Strunz No: V/F.06-10
Locality:

Notes: