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Hydroxylbastnäsite-(Nd)

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 4
Solubility +++ acids
Crystal System hexagonal,

Chemism

Chemical formula

(Nd,La)(CO3)(OH,F)

Chemical composition

Lanthanum, Neodymium, Fluor, Kohlenstoff, Sauerstoff, Wasserstoff

Unit weight: 220.4228335625 u; Number of atoms in the formula: 6.75

Info

Empirical formula:

(Nd0.75La0.25)(CO3)((OH)0.75F0.25)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.34

0.75

11.11

1.0079470

0.7559603
Carbon

C

5.45

1

14.81

12.0107800

12.0107800
Oxygen

O

27.22

3.75

55.56

15.9994300

59.9978625
Fluorine

F

2.15

0.25

3.70

18.9984033

4.7496008
Lanthanum

La

15.75

0.25

3.70

138.9055200

34.7263800
Neodymium

Nd

49.08

0.75

11.11

144.2430000

108.1822500

Analysis wt%

La2O3 : 27.10, Pr2O3 : 8.50, Nd2O3 : 31.50, Sm2O3 : 4.40, Eu2O3 : 1.30, Gd2O3 : 1.40, F : 3.30, H2O : 2.26, CO2 : 20.63, Ln2O3 : 74.70 (Ref: Mineralogical Magazine 85)

Strunz 9th edition incl. updates

5.BD.35

5: Carbonate (Carbonate, Nitrate)
B: Carbonate mit weitere Anionen, ohne H2O
D: Mit Selten-Erden-Elementen (REE)
35:Bastnäsit-Gruppe

Lapis Classification

V/C.07-060

V: NITRATE, CARBONATE UND BORATE
C: Wasserfreie Carbonate, mit fremden Anionen
7: Bastnäsit-Gruppe

Classification by Hölzel

5.BD.211

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
B: Carbonates (+Anions -Water)
D: Carbonates with Rare Earth Elements
2: F/CO3=1 Bastnäsite-Group

IMA Classification

IMA Classification

 Bastnäsite group

Optical Properties

Color

weiß

Streak color

weiß

max. Birefringence

0.095
Birefringence chart\! Hydroxylbastnäsite-(Nd) title=Birefringence chart Hydroxylbastnäsite-(Nd)

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.715

RI value γ / ε

1.81

Ri mean

1.747

2V angle

Uniaxial (+)

Crystallography

Crystal System

hexagonal

Cell parameters a (Å)

7.191

Cell parameters b (Å)

-

Cell parameters c (Å)

9.921

Cell parameters a/b or c/a

1.380

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

6

Volume (ų)

444.288

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4

VHN (Hardness Vickers)

18 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.89 (berechnet)

4.943 ( ρ calc. Mineralienatlas )

Instability

+++ acids

(Co-)Type locality

(Co-)Type locality

Montenegro/Niksic

Montenegro/Niksic/Zagrad

IMA group assignments

Other languages

Spanish

Hidroxilbastnäsita-(Nd)

French

Hydroxylbastnaesite-(Nd)

German

Hydroxylbastnäsit-(Nd)

English

Hydroxylbastnäsite-(Nd)

Alternative Name

German

Hydroxylcarbonat-(Nd)

Am. Mineral. 87 (2002), 766.

The Canadian Mineralogist Vol. 44, pp. 1557-1560 (2006)

English

Hydroxylcarbonate-(Nd)

CNMNC symbol

Symbol

Hbsn-Nd

Locations with GPS information

IDs

GUSID (Global unique identifier short form) BBFeNlcXHUmD_7_rFylTJg
GUID (Global unique identifier) 365E1104-1757-491D-83FF-BFEB17295326
Database ID 1683