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Fluocerite-(La)

Pictures (1 Images total)

Florencit-(La)
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Florencit-(La)
Bildbreite: 1 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Baden-Württemberg/Freiburg, Bezirk/Ortenaukreis/Oberwolfach/Grube Clara
Mineral: Fluocerite-(La)
Image: 1225193071
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Florencit-(La)

Bildbreite: 1 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Deutschland
Copyright: Stephan Wolfsried
Contribution: Hg 2008-10-28
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland

Collectors Summary

Color grünlichgelb
Streak color weiß
Hardness (Mohs) 4.00 - 5.00
Solubility +++ H2SO4, - andere Säuren
Crystal System trigonal, P3c1

Chemism

Chemical formula

(La,Ce)F3

Chemical composition

Cerium, Lanthanum, Fluor

Unit weight: 196.20337475 u; Number of atoms in the formula: 4

Info

Empirical formula:

(La0.75Ce0.25)F3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Fluorine

F

29.05

3

75.00

18.9984033

56.9952098
Lanthanum

La

53.10

0.75

18.75

138.9055200

104.1791400
Cerium

Ce

17.85

0.25

6.25

140.1161000

35.0290250

Analysis wt%

La2O3 : 42.34, Ce2O3 : 33.13, Pr2O3 : 3.68, Nd2O3 : 3.12, ThO2 : 1.56, CaO : 0.54, F : 25.27, Ln2O3 : 82.78 (Ref: Tr.Min.Muz.69)

Strunz 9th edition incl. updates

3.AC.15

3: Halide (Fluoride, Chloride, Bromide, Iodide)
A: Einfache Halogenide ohne H2O
C: M:X = 1:3
15:Fluocerit-Gruppe

Lapis Classification

III/A.10-010

III: HALOGENIDE (Fluoride, Chloride, Bromide, Jodide)
A: Einfache Halogenide
10: Wasserfrei, Metall : Halogen = 1:2, 1:3

Classification by Hölzel

3.AC.210

3: HALIDES
A: Simple Halides without H2O
C: Me/X=1/3

Dana 8th edition

09.03.04.02

09: Halide Minerals
03: Anhydrous and Hydrated Halides
04: Fluocerite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

grünlichgelb

Streak color

weiß

max. Birefringence

0.006
Birefringence chart\! Fluocerite-(La) title=Birefringence chart Fluocerite-(La)

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

1.609

RI value γ / ε

1.603

Ri mean

1.607

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

165

Space Group

P3c1

Cell parameters a (Å)

7.190

Cell parameters b (Å)

-

Cell parameters c (Å)

7.367

Cell parameters a/b or c/a

1.025

Cell parameters c/b

-

Z

6

Volume (ų)

329.822

X-Ray Powder Diffraction

3.60(40),
3.19(100),
2.07(60),
2.01(60),
1.796(50),
1.736(40),
1.440(40),
1.048(70)
XRD chart Fluocerite-(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)

4.00 - 5.00

VHN (Hardness Vickers)

390

Density (g/cm³)

5.93

5.927 ( ρ calc. Mineralienatlas )

Instability

+++ H2SO4, - andere Säuren

(Co-)Type locality

(Co-)Type locality

Kasachstan/Qaraghandy, Oblysy (Karaganda)/Kent-Massiv/Zhanuzak Mine

Preface

Author (Name, Year)

Chistyakova & Kazakova, 1969

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 204

Other languages

German

Fluocerit-(La)

Spanish

Fluocerita-(La)

English

Fluocerite-(La)

French

Fluocerite-(La)

Russian

Флюоцерит-(La)

CNMNC symbol

Symbol

Fcrt-La

Locations with GPS information

IDs

GUSID (Global unique identifier short form) xe6_pi1xv0C3f3ZoVMWPpA
GUID (Global unique identifier) A6BFEEC5-712D-40BF-B77F-766854C58FA4
Database ID 1242