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Arsenoflorencite-(La) (Arsenoflorencit-(La))

Pictures (1 Images total)

Arsenoflorencit-La
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Arsenoflorencit-La
Manganabbau Ilfeld; Bildbreite 1,2 mm
Copyright: Ulrich Hansper; Contribution: Ulrich Hansper
Collection: Ulrich Hansper
Location: Deutschland/Thüringen/Nordhausen, Landkreis/Harztor/Ilfeld
Mineral: Arsenoflorencite-(La)
Image: 1579023148
License: Usage for Mineralienatlas project only
Arsenoflorencit-La

Manganabbau Ilfeld; Bildbreite 1,2 mm
Collection: Ulrich Hansper
Copyright: Ulrich Hansper
Contribution: Ulrich Hansper 2020-01-14
Locality: Ilfeld / Harztor / Nordhausen, Landkreis / Thüringen / Deutschland

Collectors Summary

Color weiß
Streak color weiß
Hardness (Mohs) 3.5
Crystal System trigonal, R3m

Chemism

Chemical formula

LaAl3(AsO4)2(OH)6

Additional chem. information

Alunit-Gruppe

Chemical composition

Aluminium, Arsen, Lanthanum, Sauerstoff, Wasserstoff

Unit weight: 599.7330406 u; Number of atoms in the formula: 26

Info

Empirical formula:

LaAl3(AsO4)2(OH)6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.01

6

23.08

1.0079470

6.0476820
Oxygen

O

37.35

14

53.85

15.9994300

223.9920200
Aluminium

Al

13.50

3

11.54

26.9815382

80.9446146
Arsenic

As

24.98

2

7.69

74.9216020

149.8432040
Lanthanum

La

23.16

1

3.85

138.9055200

138.9055200

Analysis wt%

As2O5 : 35.06, P2O5 : 2.54, Al2O3 : 25.38, Fe2O3 : 0.77, La2O3 : 15.42, Ce2O3 : 5.01, Pr2O3 : 1.17, Nd2O3 : 3.50, SrO : 1.65, H2O : 9.09, Ln2O3 : 25.10 (Ref: European Journal of Mineralogy 2010)

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.36-125

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.355

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

IMA status

anerkannt - IMA Web-Seite Jan. 2010

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Alunite supergroup  ⇒ Dussertite group with 1c

Optical Properties

Color

weiß

Streak color

weiß

Diaphaneity (Transparency)

transparent

max. Birefringence

0.010
Birefringence chart\! Arsenoflorencite-(La) title=Birefringence chart Arsenoflorencite-(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

1.740

RI value γ / ε

1.750

Ri mean

1.743

2V angle

Uniaxial (+)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

7.032

Cell parameters b (Å)

-

Cell parameters c (Å)

16.515

Cell parameters a/b or c/a

2.349

Cell parameters c/b

-

Z

3

Volume (ų)

707.24

Crystal structure

Struktur ermittelt

X-Ray Powder Diffraction

5.755(27), 3.538(55), 2.982(100), 2.211(28), 2.179(19), 1.914(38), 1.767(24), 1.298(18)
XRD chart Arsenoflorencite-(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)

3.5

Density (g/cm³)

4.15

4.224 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Russland/Nordwestrussland, Föderationskreis/Komi, Republik/Kozhim Fluß-Basin/Maldynyrd Gebiet/Grubependity-See/Grubependity Karsee

Preface

Author (Name, Year)

Stuart J. Mills, 2009

References

Scharm, B., Scharmová, M., Sulovský, P. and Kühn, P.; Philipsbornite, arsenoflorencite-(La), and arsenoflorencite-(Nd) from the uranium district in northern Bohemia, Czechoslovakia. Casopis mineral. geol. (1991) 36, 103-113.

Neue Mineralien - IMA Web-Seite Jan. 2010

Stuart J. Mills; Pavel M. Kartashov; Anthony R. Kampf; Mati Raudsepp: Arsenoflorencite-(La), a new mineral from the Komi Republic, Russian Federation: description and crystal structure. Eur J Mineral Vol. 22, Nr. 4 (2010) S. 613-621.

IMA group assignments

 
Alunite supergroup
DG3(TX4)2X’6
 
 

 
 
Dussertite group with 1c
 
 
 

 
 
 
Arsenocrandallite
(Ca,Sr)Al3[(As,P)O4]2(OH)5·H2O
trigonal
R3m

 
 
 
Arsenoflorencite-(Ce)
(Ce,La)Al3(AsO4)2(OH)6
trigonal
R3m

 
 
 
Arsenoflorencite-(La)
LaAl3(AsO4)2(OH)6
trigonal
R3m

 
 
 
Arsenoflorencite-(Nd)
(Nd,La,Ce,Ba)(Al3,Fe3+)[(OH)6|(AsO4,PO4)2]
 
 

 
 
 
Arsenogorceixite
BaAl3[(OH,F)6|AsO3(OH)|(AsO4,PO4)]
trigonal
R3m

 
 
 
Arsenogoyazite
(Sr,Ca,Ba)Al3(AsO4)(AsO3OH)(OH)6
trigonal
R3m, R3m

 
 
 
Arsenowaylandite ?
Bi3+Al3[(OH)6|(AsO4,PO4)2]
 
 

 
 
 
Dussertite
BaFe33+(AsO4)2(OH)5
trigonal
R3m

 
 
 
Graulichite-(Ce)
CeFe3+3(AsO4)2(OH)6
trigonal
R3m

 
 
 
Graulichite-(La)
LaFe3+3(AsO4)2(OH)6
trigonal
R3m

 
 
 
Philipsbornite
PbAl3(AsO4)2(OH)5·H2O
trigonal
R3m

 
 
 
Segnitite
PbFe33+H(AsO4)2(OH)6
trigonal
R3m

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Actuality: 27. Apr 2024 - 09:46:28

Other languages

German

Arsenoflorencit-(La)

Spanish

Arsenoflorencita-(La)

English

Arsenoflorencite-(La)

French

Arsenoflorencite-(La)

Russian

Арсенофлоренсит-(La)

CNMNC (IMA)-Number

IMA 2009-078

CNMNC symbol

Symbol

Aflo-La

Locations with GPS information

IDs

GUSID (Global unique identifier short form) 2qhYEGL8DkGcYPEXncv0kw
GUID (Global unique identifier) 1058A8DA-FC62-410E-9C60-F1179DCBF493
Database ID 6862