General Hydroxylbastnasite-(La) Information
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Chemical Formula: |
La(CO3)(OH) |
Composition: |
Molecular Weight = 215.92 gm |
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Lanthanum 64.33 % La 75.45 % La2O3 |
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Hydrogen 0.47 % H 4.17 % H2O |
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Carbon 5.56 % C 20.38 % CO2 |
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Oxygen 29.64 % O |
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______ ______ |
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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. |
Synonym: |
Hydroxylcarbonate-(La) |
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Hydroxylbastnasite-(La) Crystallography
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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 |
X Ray Diffraction: |
By Intensity(I/Io): 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), |
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Physical Properties of Hydroxylbastnasite-(La)
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Color: |
Yellow. |
Density: |
4.7 - 4.8, Average = 4.75 |
Hardness: |
4 - Fluorite |
Luster: |
Vitreous - Greasy |
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Optical Properties of Hydroxylbastnasite-(La)
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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 |
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Calculated Properties of Hydroxylbastnasite-(La)
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Electron Density: |
relectron=4.13 gm/cc note: rHydroxylbastnasite-(La) =4.64 gm/cc. |
Fermion Index |
Fermion Index = 0.00133 Boson Index = 0.99867 |
Photoelectric: |
PEHydroxylbastnasite-(La) = 311.11 barns/electron U=PEHydroxylbastnasite-(La) x relectron=1,283.62 barns/cc. |
Radioactivity: |
GRapi = 61,017.64 (Gamma Ray American Petroleum Institute Units)
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 Bequerols (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 |
61,017.64 |
20.06 |
| 100 gm / 3.45 cm |
144,102 |
3.89E-06 |
6,101.76 |
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)
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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)
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Hydroxylbastnasite-(La) Classification
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Dana Class: |
16a.1.2.2 (16a)Carbonates - Hydroxyl or Halogen |
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(16a.1)in the Bastnasite/Shynchysite/Parasite Groups |
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(16a.1.2)Bastnasite Subgroup(Hydroxylbastnasite Series) |
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16a.1.2.1 Hydroxylbastnasite-(Ce) Ce(CO3)(OH) P 62c 6 m2 |
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16a.1.2.2 Hydroxylbastnasite-(La) La(CO3)(OH) C 2221 2 2 2 |
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16a.1.2.3 Hydroxylbastnasite-(Nd) Nd(CO3)(OH) P 62c 6 m2 |
Strunz Class: |
V/C.07-40 V - Nitrates, Carbonates and Borates |
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V/C - Waterfree carbonates with unfamiliar anions |
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V/C.07 - Bastnäsite-(Y) - Mineevite-(Y) series |
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V/C.07-10 Bastnasite-(Y) Y(CO3)F P 62c 6 m2 |
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V/C.07-20 Bastnasite-(La) La(CO3)F P 62c 6 m2 |
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V/C.07-30 Bastnasite-(Ce) Ce(CO3)F P 62c 6 m2 |
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V/C.07-40 Hydroxylbastnasite-(La) La(CO3)(OH) C 2221 2 2 2 |
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V/C.07-50 Hydroxylbastnasite-(Ce) Ce(CO3)(OH) P 62c 6 m2 |
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V/C.07-60 Hydroxylbastnasite-(Nd) Nd(CO3)(OH) P 62c 6 m2 |
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V/C.07-61 Kozoite-(Nd)! (Nd,La,Sm,Pr)(CO3)(OH) Pmcn 2/m 2/m 2/m |
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V/C.07-62 Kozoite-(La)! La(CO3)(OH) Pmcn 2/m 2/m 2/m |
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V/C.07-64 Horvathite-(Y)! NaY(CO3)F2 Pmcn 2/m 2/m 2/m |
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V/C.07-70 Parisite-(Ce) Ca(Ce,La)2(CO3)3F2 R 3 3 |
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V/C.07-80 Parisite-(Nd) Ca(Nd,Ce,La)2(CO3)3F2 R 3 3 |
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V/C.07-90 Rontgenite-(Ce) Ca2(Ce,La)3(CO3)5F3 R 3 3 |
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V/C.07-100 Synchysite-(Y) CaY(CO3)2F C 2/c 2/m |
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V/C.07-110 Synchysite-(Ce) CaCe(CO3)2F C 2/c 2/m |
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V/C.07-120 Synchysite-(Nd) CaNd(CO3)2F Unk Ortho |
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V/C.07-130 Huanghoite-(Ce) BaCe(CO3)2F R 3m 3 2/m |
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V/C.07-140 Cebaite-(Ce) Ba3Ce2(CO3)5F2 C 2/m or C 2 Mono |
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V/C.07-150 Cebaite-(Nd)! Ba3(Nd,Ce)2(CO3)5F2 Unk Mono |
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V/C.07-154 Kukharenkoite-(La)! Ba2(La,Ce)(CO3)3F P 21/m 2/m |
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V/C.07-155 Kukharenkoite-(Ce)! Ba2Ce(CO3)3F P 21/m 2/m |
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V/C.07-160 Zhonghuacerite-(Ce) Ba2Ce(CO3)3F P 21/m 2/m |
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V/C.07-170 Cordylite-(Ce) Ba(Ce,La)2(CO3)3F2 P 63/mmc 6/m 2/m 2/m |
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V/C.07-175 Lukechangite-(Ce)! Na3Ce2(CO3)4F P 63/mmc 6/m 2/m 2/m |
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V/C.07-190 Mineevite-(Y) Na25Ba(Y,Gd,Dy)2(HCO3)4(CO3)11(SO4)2ClF2 P 63/m 6/m |
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V/C.07-200 Reederite-(Y)! Na15Y2(CO3)9(SO3F)Cl P 6 6 |
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V/C.07-210 Micheelsenite! (Ca,Y)3Al[PO3OH,CO3](CO3)(OH)6·12(H2O) P 63 6 |
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Other Hydroxylbastnasite-(La) Information
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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 -Google Images
4 -Google Scholar
5 -MinDAT
6 -MinMax(Deutsch)
7 -MinMax(English)
8 -Mineralienatlas (Deutsch)
9 -QUT Mineral Atlas
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Print or Cut-and-Paste your Hydroxylbastnasite-(La) Specimen Label here :
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Hydroxylbastnasite-(La)
La(CO3)(OH)
Dana No: 16a.1.2.2 Strunz No: V/C.07-40
Locality:
Notes:
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