Kozoite-(La) Mineral Data

General Kozoite-(La) Information

Chemical Formula:

La(CO3)(OH)

Composition:

Molecular Weight = 190.98 gm

Strontium 0.92 % Sr 1.09 % SrO

Calcium 4.41 % Ca 6.17 % CaO

Lanthanum 29.82 % La 34.97 % La₂O₃

Praeseodymium 3.69 % Pr 4.32 % Pr₂O₃

Samarium 0.79 % Sm 0.91 % Sm₂O₃

Gadolinium 1.65 % Gd 1.90 % Gd₂O₃

Yttrium 3.26 % Y 4.14 % Y₂O₃

Hydrogen 0.65 % H 5.85 % H₂O

Carbon 6.29 % C 23.04 % CO₂

Neodymium 15.10 % Nd 17.62 % Nd₂O₃

Oxygen 33.43 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

La_0.41Ca_0.21Nd_0.2Y_0.07Pr_0.05Sr_0.02Gd_0.02Sm_0.01(CO₃)(OH)_0.74ï¿½0.25(H₂O)

Environment:

Occurs in cavities in an alkaline olivine basalt associated wth kozoite0(Nd). Ancylite group.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Mitsukoshi, Saga Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named as the La-dominant analog of kozoite-(Nd).

Synonym:

IMA2002-054

Kozoite-(La) Image

Images:

Kozoite-(La) Kozoite-(Nd)

Comments: Backscatter electron image of polished section through a sperical aggregate showing the zonation form kosoite-(La) to kosolite-(Nd). (JMPS, v 98, p 138).
Location: Cavity in alkaline basalt near Mitsukoshi, Saga Prefecture, Japan. Scale: See Image.
© JMPS

Kozoite-(La) Crystallography

Axial Ratios:

a:b:c =0.5856:1:0.8489

Cell Dimensions:

a = 4.986, b = 8.513, c = 7.227, Z = 4; V = 306.76 Den(Calc)= 4.14

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmcn

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

By Intensity(I/I_o): 4.31(1)(110,020), 3.69(0.72)(111,021), 2.93(0.57)(121,102),2.33(0.5)(131), 2.06(0.48)(221), 1.994(0.35)(212), 2.64(0.3), 2.49(0.29),

Physical Properties of Kozoite-(La)

Color:

Pale pinkish purple, White.

Diaphaneity:

Translucent

Habit:

Spherical - Spherical, rounded aggregates.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Kozoite-(La)

Optical Data:

Biaxial (?)

NCalc= 1.73 - from Gladstone-Dale relationship (KC = 0.1756) where Ncalc=Dcalc*KC+1

Calculated Properties of Kozoite-(La)

Electron Density:

Bulk Density (Electron Density)=3.77 gm/cc
note: Specific Gravity of Kozoite-(La) =4.14 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Kozoite-(La)= 270.21 barns/electron
U=PE_Kozoite-(La) x r_electron=1,020.00 barns/cc.

Radioactivity:

GRapi = 49,692.18 (Gamma Ray American Petroleum Institute Units)
Concentration of Kozoite-(La) per GRapi unit = 20.12 (PPM)

Kozoite-(La) 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) 612.10 ±153.03 grams of pure Kozoite-(La) .

**Estimated Radioactivity from Kozoite-(La)** - 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 / 7.73 cm	1,144,473	3.09E-05	49,692.18	16.34
100 gm / 3.59 cm	114,447	3.09E-06	4,969.22	1.63
10 gm / 1.66 cm	11,445	3.09E-07	496.92	0.16
1 gm / 7.73 mm	1,144	3.09E-08	49.69	0.02
0.1 gm / 3.59 mm	114	3.09E-09	4.97	0.00
0.01 gm / 1.66 mm	11	3.09E-10	0.50	0.00
0.001 gm / 0.77 mm	1	3.09E-11	0.05	0.00

Weight of pure Kozoite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.14 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 ( 2.55 % Th) From Sum REE Elements (51.05 % REE)

Kozoite-(La) Classification

Dana Class:

16b.01.01.07 (16b)Carbonates - Hydroxyl or Halogen

(16b.01)where (A)m (B)n (XO3)p Zq, with (m+n):p=1:1

(16b.01.01)Ancylite group

16b.01.01.01 Ancylite-(Ce) SrCe(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m

16b.01.01.02 Calcioancylite-(Ce) CaCe(CO3)2(OH)•(H2O) P mmm 2/m 2/m 2/m

16b.01.01.03 Calcioancylite-(Nd) CaNd(CO3)2(OH)•(H2O) Pm m

16b.01.01.04 Gysinite-(Nd) Pb(Nd,La)(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m

16b.01.01.05 Ancylite-(La)! Sr(La,Ce)(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m

16b.01.01.06 Kozoite-(Nd)! (Nd,La,Sm,Pr)(CO3)(OH) Pmcn 2/m 2/m 2/m

16b.01.01.07 Kozoite-(La)! La(CO3)(OH) Pmcn 2/m 2/m 2/m

Strunz Class:

05.DC.05 05 - CARBONATES (NITRATES)

05.D - Carbonates with Additional Anions, with H2O

05.DC -With large cations

05.DC.05 Ancylite-(Ce) SrCe(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m

05.DC.05 Ancylite-(La)! Sr(La,Ce)(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m

05.DC.05 Gysinite-(Nd) Pb(Nd,La)(CO3)2(OH)•(H2O) Pmcn 2/m 2/m 2/m

05.DC.05 Calcioancylite-(Ce) CaCe(CO3)2(OH)•(H2O) P mmm 2/m 2/m 2/m

05.DC.05 Calcioancylite-(Nd) CaNd(CO3)2(OH)•(H2O) Pm m

05.DC.05 Kozoite-(La)! La(CO3)(OH) Pmcn 2/m 2/m 2/m

05.DC.05 Kozoite-(Nd)! (Nd,La,Sm,Pr)(CO3)(OH) Pmcn 2/m 2/m 2/m

Other Kozoite-(La) Information

References:

NAME( AmMin, 89:894) PHYS. PROP.(AmMin, 89:894) OPTIC PROP.(AmMin, 89:894)

See Also:

Links to other databases for Kozoite-(La) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Kozoite-(La)

La(CO3)(OH)
Dana No: 16b.01.01.07 Strunz No: 05.DC.05
Locality:

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