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Florencite-(La)

Pictures (4 Images total)

Florencit-(La)
Views (File:
1182953094
): 1831
Florencit-(La)
Grube Clara, Wolfach, Schwarzwald; Bildbreite: 1 mm
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Baden-Württemberg/Freiburg, Bezirk/Ortenaukreis/Oberwolfach/Grube Clara
Mineral: Florencite-(La)
Image: 1182953094
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Florencit-(La)

Grube Clara, Wolfach, Schwarzwald; Bildbreite: 1 mm

Copyright: Stephan Wolfsried
Contribution: Hg 2007-06-27
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland
Florencit-(La)
Views (File:
1264069570
): 1112
Florencit-(La)
Größe: 25x25 mm; Fundort: Igarapé Bahia Mine, Parauapebas, Carajás Mineralprovinz, Pará, Nordregion, Brasilien
Copyright: Paul Bongaerts; Contribution: slugslayer
Location: Brasilien/Norden (Região Norte)/Pará/Carajás Mineral-Provinz/Parauapebas/Igarapé Bahia
Mineral: Florencite-(La)
Image: 1264069570
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
Florencit-(La)

Größe: 25x25 mm; Fundort: Igarapé Bahia Mine, Parauapebas, Carajás Mineralprovinz, Pará, Nordregion, Brasilien
Copyright: Paul Bongaerts
Contribution: slugslayer 2010-01-21
Locality: Igarapé Bahia / Parauapebas / Carajás Mineral-Provinz / Pará / Norden (Região Norte) / Brasilien
Florencit-(La)
Views (File:
1219607210
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Florencit-(La)
Bildbreite: 0,6 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Deutschland
Copyright: Stephan Wolfsried; Contribution: Hg
Location: Deutschland/Baden-Württemberg/Freiburg, Bezirk/Ortenaukreis/Oberwolfach/Grube Clara
Mineral: Florencite-(La)
Image: 1219607210
Rating: 6.5 (votes: 2)
License: Usage for Mineralienatlas project only
Florencit-(La)

Bildbreite: 0,6 mm; Fundort: Grube Clara, Wolfach, Schwarzwald, Deutschland
Copyright: Stephan Wolfsried
Contribution: Hg 2008-08-24
Locality: Grube Clara / Oberwolfach / Ortenaukreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland
Florencit-(La)
Views (File:
1264186490
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Florencit-(La)
Bildbreite: 4 mm; Fundort: Igarapé Bahia Mine, Parauapebas, Carajás Mineralprovinz, Pará, Nordregion, Brasilien
Copyright: Leonardus; Contribution: slugslayer
Location: Brasilien/Norden (Região Norte)/Pará/Carajás Mineral-Provinz/Parauapebas/Igarapé Bahia
Mineral: Florencite-(La)
Image: 1264186490
Rating: 5 (votes: 2)
License: Usage for Mineralienatlas project only
Florencit-(La)

Bildbreite: 4 mm; Fundort: Igarapé Bahia Mine, Parauapebas, Carajás Mineralprovinz, Pará, Nordregion, Brasilien
Copyright: Leonardus
Contribution: slugslayer 2010-01-22
Locality: Igarapé Bahia / Parauapebas / Carajás Mineral-Provinz / Pará / Norden (Região Norte) / Brasilien

Collectors Summary

Color farblos, grau, hellgelb, rosa
Streak color weiß
Hardness (Mohs) 5
Solubility +++ HCl
Crystal System trigonal, R3m

Chemism

Chemical formula

(La,Ce)Al3(PO4)2(OH)6

Chemical composition

Aluminium, Cerium, Lanthanum, Phosphor, Sauerstoff, Wasserstoff

Unit weight: 512.140004 u; Number of atoms in the formula: 26

Info

Empirical formula:

(La0.75Ce0.25)Al3(PO4)2(OH)6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.18

6

23.08

1.0079470

6.0476820
Oxygen

O

43.74

14

53.85

15.9994300

223.9920200
Aluminium

Al

15.81

3

11.54

26.9815382

80.9446146
Phosphorus

P

12.10

2

7.69

30.9737612

61.9475224
Lanthanum

La

20.34

0.75

2.88

138.9055200

104.1791400
Cerium

Ce

6.84

0.25

0.96

140.1161000

35.0290250

Analysis wt%

La2O3 : 21.20, Ce2O3 : 10.68, Al2O3 : 29.86, P2O5 : 27.71, H2O : 10.55, Ln2O3 : 31.88 (Ref: berechnet)

Strunz 9th edition incl. updates

8.BL.13

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
L: Mit mittelgroßen und großen [Kationen] (OH, etc.):RO4 = 3:1
13:

Lapis Classification

VII/B.36-110

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
36: Mittelgroße und große Kationen: Mg-Cu-Zn und Ca-Na-K-Ba-Pb; Crandallit-Gruppe

Classification by Hölzel

8.BK.310

8: PHOSPHATES ARSENATES VANADATES
B: Phosphates (+Anions -Water)
K: Phosphatian (+AsO4) Alunites, trigonal, very large: 1,2,3,4, Vmed: 3
3: With REE's Florencite-Group

Dana 8th edition

41.05.10.03

41: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
05: Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen where (A B)2 (XO4) Zq
10: Dussertite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Alunite supergroup  ⇒ Plumbogummite group with -1c

Optical Properties

Color

farblos, grau, hellgelb, rosa

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.007
Birefringence chart\! Florencite-(La) title=Birefringence chart Florencite-(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

1.694

RI value γ / ε

1.701

Ri mean

1.696

2V angle

Uniaxial (+)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

6.987

Cell parameters b (Å)

-

Cell parameters c (Å)

16.248

Cell parameters a/b or c/a

2.325

Cell parameters c/b

-

Z

3

Volumne (ų)

686.929

X-Ray Powder Diffraction

5.67(90),
3.49(70),
2.93(100),
2.171(80),
1.884(70),
1.743(70),
1.601(70),
1.190(70)
XRD chart Florencite-(La)

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

5

VHN (Hardness Vickers)

390 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.457 - 3.71 / Durchschnittlich = 3.58

3.714 ( ρ calc. Mineralienatlas )

Instability

+++ HCl

(Co-)Type locality

(Co-)Type locality

Demokratische Republik Kongo/Katanga (Shaba), Provinz/Ober-Katanga (Haut-Katanga), Distrikt/Likasi/Shituru

Preface

Author (Name, Year)

Lefebvre & Gasparrini, 1980

References

Canadian Mineralogist 18 (1980), 301

IMA group assignments

Other languages

German

Florencit-(La)

Spanish

Florencita-(La)

English

Florencite-(La)

French

Florencite-(La)

Russian

Флоренсит-(La)

Simplified Chinese

磷铝钕矿

CNMNC symbol

Symbol

Flo-La

Locations with GPS information