Hydroxylbastnasite-(Nd) Mineral Data

General Hydroxylbastnasite-(Nd) Information

Chemical Formula:

Nd(CO3)(OH)

Composition:

Molecular Weight = 221.26 gm

Hydrogen 0.46 % H 4.07 % H₂O

Carbon 5.43 % C 19.89 % CO₂

Neodymium 65.19 % Nd 76.04 % Nd₂O₃

Oxygen 28.92 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Nd(CO₃)(OH)

Environment:

Red karstic bauxites.

IMA Status:

Approved IMA 1985

Locality:

Niksic, Montenegro, Yugoslavia. Link to MinDat.org Location Data.

Name Origin:

Named as Nd end member in the hydroxylbastnasite series.

Name Pronunciation:

Hydroxylbastnasite-(Nd) + Pronunciation

Synonym:

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

Hydroxylcarbonate-(Nd)

Hydroxylbastnasite-(Nd) Crystallography

Axial Ratios:

a:c = 1:1.37964

Cell Dimensions:

a = 7.191, c = 9.921, Z = 6; V = 444.29 Den(Calc)= 4.96

Crystal System:

Hexagonal - Ditrigonal Dipyramidal H-M Symbol (6 m2) Space Group: P 62c

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

By Intensity(I/I_o): 2.911(1), 4.95(0.88), 3.596(0.79),

Physical Properties of Hydroxylbastnasite-(Nd)

Cleavage:

{0001} Parting

Color:

White.

Diaphaneity:

Translucent

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

1-2 - Between Talc and Gypsum

Luminescence:

Non-fluorescent.

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Hydroxylbastnasite-(Nd)

Gladstone-Dale:

CI calc= 0.039 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1537,KC= 0.16
Ncalc = 1.79

Optical Data:

Uniaxial (+), w=1.715, e=1.81, bire=0.0950.

Calculated Properties of Hydroxylbastnasite-(Nd)

Electron Density:

Bulk Density (Electron Density)=4.44 gm/cc
note: Specific Gravity of Hydroxylbastnasite-(Nd) =4.96 gm/cc.

Fermion Index:

Fermion Index = 0.13
Boson Index = 0.87

Photoelectric:

PE_{Hydroxylbastnasite-(Nd)}= 381.92 barns/electron
U=PE_{Hydroxylbastnasite-(Nd)} x r_electron=1,695.22 barns/cc.

Radioactivity:

GRapi = 62,228.22 (Gamma Ray American Petroleum Institute Units)
Concentration of Hydroxylbastnasite-(Nd) per GRapi unit = 16.07 (PPM)

Hydroxylbastnasite-(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) 488.79 ±122.20 grams of pure Hydroxylbastnasite-(Nd) .

**Estimated Radioactivity from Hydroxylbastnasite-(Nd)** - 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 / 7.28 cm	1,460,285	3.95E-05	62,228.22	20.46
100 gm / 3.38 cm	146,029	3.95E-06	6,222.82	2.05
10 gm / 1.57 cm	14,603	3.95E-07	622.28	0.20
1 gm / 7.28 mm	1,460	3.95E-08	62.23	0.02
0.1 gm / 3.38 mm	146	3.95E-09	6.22	0.00
0.01 gm / 1.57 mm	15	3.95E-10	0.62	0.00
0.001 gm / 0.73 mm	1	3.95E-11	0.06	0.00

Weight of pure Hydroxylbastnasite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.96 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 ( 3.26 % Th) From Sum REE Elements (65.19 % REE)

Hydroxylbastnasite-(Nd) Classification

Dana Class:

16a.01.02.03 (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-(Nd) Information

References:

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

See Also:

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

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Print or Cut-and-Paste your Hydroxylbastnasite-(Nd) Specimen Label here :

Hydroxylbastnasite-(Nd)

Nd(CO3)(OH)
Dana No: 16a.01.02.03 Strunz No: 05.BD.20a
Locality:

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