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Monazite-(Nd)

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Monazit-(Nd)
Views (File:
1675538200
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Monazit-(Nd)
gelber Kristall von Monazit-(Nd), Grubependity-See, Republik Komi, Russland; BB ~ 1 mm, analysiert
Copyright: mintreasure.com; Contribution: openpit
Location: Russland/Nordwestrussland, Föderationskreis/Komi, Republik/Kozhim Fluß-Basin/Maldynyrd Gebiet/Grubependity-See
Mineral: Monazite-(Nd)
Image: 1675538200
License: Usage for Mineralienatlas project only
Monazit-(Nd)

gelber Kristall von Monazit-(Nd), Grubependity-See, Republik Komi, Russland; BB 1 mm, analysiert

Copyright: mintreasure.com
Contribution: openpit 2023-02-04
Locality: Grubependity-See / Maldynyrd Gebiet / Kozhim Fluß-Basin / Komi, Republik / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color braun, rot, gelb, orange
Streak color grauweiß
Hardness (Mohs) 5
Solubility + warme konz. HCl
Crystal System monoklin, P21/n

Chemism

Chemical formula

Nd(PO4)

Chemical composition

Neodymium, Phosphor, Sauerstoff

Unit weight: 239.2144812 u; Number of atoms in the formula: 6

Info

Empirical formula:

Nd(PO4)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

26.75

4

66.67

15.9994300

63.9977200

Phosphorus

P

12.95

1

16.67

30.9737612

30.9737612

Neodymium

Nd

60.30

1

16.67

144.2430000

144.2430000

Analysis wt%

Ce2O3 : 19.85, La2O3 : 2.48, Pr2O3 : 6.47, Nd2O3 : 30.32, Sm2O3 : 8.81, Gd2O3 : 2.26, ZrO2 : 0.77, P2O5 : 28.65, Ln2O3 : 70.19 (Ref: Schweizerische Mineralogische und Petrographische

Mitteilungen 87)

Strunz 9th edition incl. updates

8.AD.50

8: Phosphate, Arsenate, Vanadate
A: Phosphate, etc., ohne weitere Anionen, ohne H2O
D: Mit ausschließlich großen [Kationen]
50:Monazit-Gruppe

Lapis Classification

VII/A.15-030

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
A: Wasserfreie Phosphate [PO4] 3-, ohne fremde Anionen
15: Sehr große Kationen: Ca-Na-K, SE, Bi u.a.; Monazit-Gruppe

Classification by Hölzel

8.AF.105

8: PHOSPHATES ARSENATES VANADATES
A: Phosphates (-anions -water)
F: Monazite-Group

Dana 8th edition

38.04.03.05

38: Anhydrous Phosphates, etc
04: Anhydrous Phosphates, etc A+ XO4
03: Monazite Group (Monoclinic: P21/n)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Monazite group

Optical Properties

Color

braun, rot, gelb, orange

Streak color

grauweiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.047

Birefringence chart\! Monazite-(Nd) title=Birefringence chart Monazite-(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

1.783

RI value β

1.784

RI value γ / ε

1.83

Ri mean

1.799

2V angle

Biaxial (+) 15° - 17° (gemessen) 16.8° (berechnet)

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell parameters a (Å)

6.745

Cell parameters b (Å)

6.964

Cell parameters c (Å)

6.435

Cell parameters a/b or c/a

0.969

Cell parameters c/b

0.924

Cell parameters α

90°

Cell parameters β

103.65

Cell parameters γ

90°

Z

4

Volume (ų)

293.729

X-Ray Powder Diffraction

4.15(30),
3.280(60),
3.080(100),
2.846(50),
2.590(30),
2.425(40),
2.177(30),
1.954(30)

XRD chart Monazite-(Nd)

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.43 (berechnet)

5.409 ( ρ calc. Mineralienatlas )

Instability

+ warme konz. HCl

Preface

Author (Name, Year)

Graeser & Schwander, 1987

References

Schweizerische Mineralogische und Petrographische Mitteilungen 67 (1987), 103

IMA group assignments


 
 
(Ca,Ce,Th,U)[(P,Si)O4]
monoklin
P21/n

 
 
Ce(AsO4)
monoklin
P21/n

 
 
LaAsO4
monoklin
P21/n

 
 
Ce(PO4)
monoklin
P21/n

 
 
Gd(PO4)
monoklin
P21/n

 
 
La(PO4)
monoklin
P21/n

 
 
Nd(PO4)
monoklin
P21/n

 
 
Sm(PO4)
monoklin
P21/n

 
 
Bi(AsO4)
monoklin
P21/n

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Actuality: 14. May 2024 - 14:08:22

Other languages

Spanish

Monacita-(Nd)

German

Monazit-(Nd)

English

Monazite-(Nd)

French

Monazite-(Nd)

Russian

Монацит-(Nd)

Simplified Chinese

独居石-(Nd)

Traditional Chinese

釹獨居石

Simplified Chinese

钕独居石

CNMNC (IMA)-Number

IMA 1986-052

CNMNC symbol

Symbol

Mnz-Nd

Locations with GPS information

IDs

GUSID (Global unique identifier short form) foPVr7mAO0Sil5a5-x8MJA
GUID (Global unique identifier) AFD5837E-80B9-443B-A297-96B9FB1F0C24
Database ID 2576