Hydroxylbastnasite-(La) Mineral Data

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General Hydroxylbastnasite-(La) Information

Chemical Formula:

La(CO3)(OH)

Composition:

Molecular Weight = 215.92 gm

Lanthanum 64.33 % La 75.45 % La₂O₃

Hydrogen 0.47 % H 4.17 % H₂O

Carbon 5.56 % C 20.38 % CO₂

Oxygen 29.64 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

La(CO₃)(OH)

Environment:

Lower portions of karstic bauxites.

IMA Status:

Approved IMA 1983

Locality:

Hungary and Yugoslavia. Link to MinDat.org Location Data.

Name Origin:

Named to conform to the bastnasite goup designations.

Name Pronunciation:

Hydroxylbastnasite-(La) + Pronunciation

Synonym:

Hydroxyl-bastnasite-(La) - Renamed Hydroxylbastnasite-(La) by Mineralogical Record, v39 (2008), p131

Hydroxylcarbonate-(La)

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Hydroxylbastnasite-(La) Crystallography

Axial Ratios:

a:b:c =1.732:1:0.7949

Cell Dimensions:

a = 21.891, b = 12.639, c = 10.047, Z = 36; V = 2,779.81 Den(Calc)= 4.64

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: C 222₁

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

By Intensity(I/I_o): 2.95(1), 1.943(0.8), 2.07(0.8),3.65(0.8), 5.02(0.8), 1.824(0.6), 2.11(0.6), 2.51(0.6),

Physical Properties of Hydroxylbastnasite-(La)

Color:

Yellow.

Density:

4.7 - 4.8, Average = 4.75

Hardness:

4 - Fluorite

Luster:

Vitreous - Greasy

Optical Properties of Hydroxylbastnasite-(La)

Optical Data:

NCalc= 1.78 - from Gladstone-Dale relationship (KC = 0.1689) where Ncalc=Dcalc*KC+1
NCalc= 1.8 - from Gladstone-Dale relationship (KC = 0.1689) where Ncalc=Dmeas*KC+1

Calculated Properties of Hydroxylbastnasite-(La)

Electron Density:

Bulk Density (Electron Density)=4.13 gm/cc
note: Specific Gravity of Hydroxylbastnasite-(La) =4.64 gm/cc.

Fermion Index:

Fermion Index = 0.0013338425
Boson Index = 0.9986661575

Photoelectric:

PE_{Hydroxylbastnasite-(La)}= 311.11 barns/electron
U=PE_{Hydroxylbastnasite-(La)} x r_electron=1,283.62 barns/cc.

Radioactivity:

GRapi = 61,017.66 (Gamma Ray American Petroleum Institute Units)
Concentration of Hydroxylbastnasite-(La) per GRapi unit = 16.39 (PPM)

Hydroxylbastnasite-(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) 498.49 ±124.62 grams of pure Hydroxylbastnasite-(La) .

**Estimated Radioactivity from Hydroxylbastnasite-(La)** - 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 / 7.44 cm	1,441,022	3.89E-05	61,017.66	20.06
100 gm / 3.45 cm	144,102	3.89E-06	6,101.77	2.01
10 gm / 1.60 cm	14,410	3.89E-07	610.18	0.20
1 gm / 7.44 mm	1,441	3.89E-08	61.02	0.02
0.1 gm / 3.45 mm	144	3.89E-09	6.10	0.00
0.01 gm / 1.60 mm	14	3.89E-10	0.61	0.00
0.001 gm / 0.74 mm	1	3.89E-11	0.06	0.00

Weight of pure Hydroxylbastnasite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.64 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 ( 3.22 % Th) From Sum REE Elements (64.33 % REE)

Hydroxylbastnasite-(La) Classification

Dana Class:

16a.01.02.02 (16a)Carbonates - Hydroxyl or Halogen

(16a.01)in the Bastnasite/Shynchysite/Parasite Groups

(16a.01.02)Bastnasite Subgroup(Hydroxylbastnasite Series)

16a.01.02.01 Hydroxylbastnasite-(Ce) Ce(CO3)(OH) P 62c 6 m2

16a.01.02.02 Hydroxylbastnasite-(La) La(CO3)(OH) C 222₁ 2 2 2

16a.01.02.03 Hydroxylbastnasite-(Nd) Nd(CO3)(OH) P 62c 6 m2

Strunz Class:

05.BD.20a 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BD -With rare-earth elements (REE)

05.BD.20a Bastnasite-(Ce) Ce(CO3)F P 62c 6 m2

05.BD.20a Bastnasite-(La) La(CO3)F P 62c 6 m2

05.BD.20a Bastnasite-(Y) Y(CO3)F P 62c 6 m2

05.BD.20a Hydroxylbastnasite-(Ce) Ce(CO3)(OH) P 62c 6 m2

05.BD.20a Hydroxylbastnasite-(La) La(CO3)(OH) C 222₁ 2 2 2

05.BD.20a Hydroxylbastnasite-(Nd) Nd(CO3)(OH) P 62c 6 m2

05.BD.20a Thorbastnasite Th(Ca,Ce)(CO3)2F2•3(H2O) P 62c 6 m2

Other Hydroxylbastnasite-(La) Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.71,p1277,1986)

See Also:

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

Hydroxylbastnasite-(La)

La(CO3)(OH)
Dana No: 16a.01.02.02 Strunz No: 05.BD.20a
Locality:

Notes: