Kamotoite-(Y) Mineral Data

Kamotoite-(Y) Mineral Data +

General Kamotoite-(Y) Information

Chemical Formula:

(Y,Nd,Gd)2U++++++4(CO3)3O12·14.5(H2O)

Composition:

Molecular Weight = 1,790.08 gm

Gadolinium 1.76 % Gd 2.03 % Gd₂O₃

Yttrium 6.46 % Y 8.20 % Y₂O₃

Uranium 53.19 % U 63.91 % UO₃

Hydrogen 1.63 % H 14.59 % H₂O

Carbon 2.01 % C 7.38 % CO₂

Neodymium 3.22 % Nd 3.76 % Nd₂O₃

Oxygen 31.73 % O

______ ______

100.00 % 99.87 % = TOTAL OXIDE

Empirical Formula:

Y_1.3Nd_0.4Gd_0.2U₄(CO₃)₃O₁₂·14.5(H₂O)

IMA Status:

Approved IMA 1986

Locality:

Kamoto, southern Shaba, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for the locality

Kamotoite-(Y) Image

Images:

Kamotoite-(Y)

Comments: Bright greenish yellow kamotoite-(Y) crystals.
Location: Kamoto mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Kamotoite-(Y)

Comments: Bright yellow, feather-like kamotoite-(Y) crystal habits.
Location: Kamoto mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Picture size 2 cm.
© Tom Loomis / Dakota Matrix

Kamotoite-(Y) Crystallography

Axial Ratios:

a:b:c =1.6411:1:0.9582

Cell Dimensions:

a = 21.22, b = 12.93, c = 12.39, Z = 4; beta = 115.3° V = 3,073.43 Den(Calc)= 3.87

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 6.48(1), 8.49(0.8), 3.054(0.6),

Physical Properties of Kamotoite-(Y)

Cleavage:

[001] Good, [010] Distinct

Color:

Yellow, Bright yellow.

Density:

3.93

Diaphaniety:

Transparent to Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Optical Properties of Kamotoite-(Y)

Gladstone-Dale:

CI meas= -0.047 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.063 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1724,KPDmeas= 0.1698,KC= 0.1622

Optical Data:

Biaxial (-), a=1.604, b=1.667, g=1.731, bire=0.1270, 2V(Calc)=86, 2V(Meas)=87.

Calculated Properties of Kamotoite-(Y)

Electron Density:

r_electron=3.45 gm/cc
note: r_{Kamotoite-(Y)}=3.93 gm/cc.

Fermion Index

Fermion Index = 0.02299
Boson Index = 0.97701

Photoelectric:

PE_{Kamotoite-(Y)}=1,414.10 barns/electron
U=PE_{Kamotoite-(Y)} x r_electron=4,883.49 barns/cc.

Radioactivity:

GRapi = 3,988,550.33 (Gamma Ray American Petroleum Institute Units)

Kamotoite-(Y) 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) 7.63 ± 1.91 grams of pure Kamotoite-(Y) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 762.60 ±190.65 grams of pure Kamotoite-(Y) .

**Estimated Radioactivity from Kamotoite-(Y)** - 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 / 7.86 cm	95,318,788	2.58E-03	3,988,550.33	1,311.30
100 gm / 3.65 cm	9,531,879	2.58E-04	398,855.03	131.13
10 gm / 1.69 cm	953,188	2.58E-05	39,885.50	13.11
1 gm / 7.86 mm	95,319	2.58E-06	3,988.55	1.31
0.1 gm / 3.65 mm	9,532	2.58E-07	398.86	0.13
0.01 gm / 1.69 mm	953	2.58E-08	39.89	0.01
0.001 gm / 0.79 mm	95	2.58E-09	3.99	0.00

Weight of pure Kamotoite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.93 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 ( 0.25 % Th) From Sum REE Elements ( 4.98 % REE)

Kamotoite-(Y) Classification

Dana Class:

16b.3.3.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.3)where Am Bn (XO3)p Zq · x(H2O), (m+n):p = 2:1

(16b.3.3)Dana Group

16b.3.3.1 Kamotoite-(Y) (Y,Nd,Gd)2U4(CO3)3O12·14.5(H2O) P 2₁/a 2/m

Strunz Class:

V/F.06-20 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 Kamotoite-(Y) Information

References:

PHYS. PROP.(Bull.Miner.,Vol.107-111,1984-1988) OPTIC PROP.(Bull.Miner.,Vol.107-111,1984-1988)

See Also:

Links to other databases for Kamotoite-(Y) :
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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Print or Cut-and-Paste your Kamotoite-(Y) Specimen Label here :

Kamotoite-(Y)

(Y,Nd,Gd)2U++++++4(CO3)3O12·14.5(H2O)
Dana No: 16b.3.3.1 Strunz No: V/F.06-20
Locality:

Notes: