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Monazite-(La)

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Monazit-(La)
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Monazit-(La)
Fundort: Kuivchorr, Lovozero, Kola, Murmansk, Russland; Bildbreite: 9 mm
Copyright: Pavel M. Kartashov; Contribution: Philip Blümner
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Lovozero/Kuivchorr
Mineral: Monazite-(La)
Image: 1230416665
Rating: 2.33 (votes: 3)
License: Usage for Mineralienatlas project only
Monazit-(La)

Fundort: Kuivchorr, Lovozero, Kola, Murmansk, Russland; Bildbreite: 9 mm
Copyright: Pavel M. Kartashov
Contribution: Philip Blümner 2008-12-27
Locality: Kuivchorr / Lovozero / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color braun, braun, gelblichbraun, rosa, gelb
Streak color grauweiß
Hardness (Mohs) 5.25
Solubility + warme konz. HCl
Crystal System monoklin, P21/n

Chemism

Chemical formula

La(PO4)

Chemical composition

Lanthanum, Phosphor, Sauerstoff

Unit weight: 233.8770012 u; Number of atoms in the formula: 6

Info

Empirical formula:

La(PO4)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

27.36

4

66.67

15.9994300

63.9977200
Phosphorus

P

13.24

1

16.67

30.9737612

30.9737612
Lanthanum

La

59.39

1

16.67

138.9055200

138.9055200

Analysis wt%

La2O3 : 69.66, P2O5 : 30.35, Ln2O3 : 69.66 (Ref: berechnet)

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.15-010

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.110

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

Dana 8th edition

38.04.03.02

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, braun, gelblichbraun, rosa, gelb

Streak color

grauweiß

Diaphaneity (Transparency)

transparent bis teilweise durchscheinend

RI value α / ω / n

1.814

Ri mean

1.814

2V angle

Biaxial

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/n

Cell parameters a (Å)

6.84

Cell parameters b (Å)

7.07

Cell parameters c (Å)

6.45

Cell parameters a/b or c/a

0.967

Cell parameters c/b

0.912

Cell parameters α

90°

Cell parameters β

103.85

Cell parameters γ

90°

Z

4

Volume (ų)

302.846

X-Ray Powder Diffraction

4.835(40),
3.532(60),
3.322(100),
3.123(100),
3.009(30),
2.610(50),
2.421(30),
1.767(60)
XRD chart Monazite-(La)

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)

5.25

VHN (Hardness Vickers)

470 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.8 - 5.5 / Durchschnittlich = 5.15

5.129 ( ρ calc. Mineralienatlas )

Instability

+ warme konz. HCl

(Co-)Type locality

(Co-)Type locality

Kasachstan/Qaraghandy, Oblysy (Karaganda)/Balqash/Kounradmassiv

Preface

Author (Name, Year)

Borovskiy & Gerasimovskiy, 1945

References

Mineralogicheskiy Zhurnal 10 (6) (1988), 16

IMA group assignments

Other languages

Spanish

Monacita-(La)

German

Monazit-(La)

French

Monazite-(La)

English

Monazite-(La)

Russian

Монацит-(La)

Traditional Chinese

鑭獨居石

Simplified Chinese

镧独居石

CNMNC symbol

Symbol

Mnz-La

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 8N4N6ZL_0k2Bqo20VeAU5g
GUID (Global unique identifier) E90DDEF0-FF92-4DD2-81AA-8DB455E014E6
Database ID 2575