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Landauite

Pictures (1 Images total)

Landauit
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Landauit
Bildbreite: 3 mm; Fundort: Burpala, Irkutsk Oblast, Sibirien, Russland
Copyright: Pavel M. Kartashov; Contribution: Philip Blümner
Location: Russland/Ferner Osten, Föderationskreis/Burjatien (Buryatia), Republik/Burpala
Mineral: Landauite
Image: 1244237021
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Landauit

Bildbreite: 3 mm; Fundort: Burpala, Irkutsk Oblast, Sibirien, Russland
Copyright: Pavel M. Kartashov
Contribution: Philip Blümner 2009-06-05
Locality: Burpala / Burjatien (Buryatia), Republik / Ferner Osten, Föderationskreis / Russland

Collectors Summary

Color schwarz-met.
Streak color grau
Lustre Halbmetallglanz
Hardness (Mohs) 7.5
Crystal System trigonal, R3

Chemism

Chemical formula

(Na,Pb)(Mn2+,Y)(Zn,Fe)2(Ti,Fe3+,Nb)18(O,OH,F)O38

Chemical composition

Blei, Eisen, Mangan, Natrium, Niob, Titan, Yttrium, Zink, Fluor, Sauerstoff, Wasserstoff

Unit weight: 1868.8518271 u; Number of atoms in the formula: 61.3

Info

Empirical formula:

(Na0.75Pb0.25)(Mn0.75Y0.25)(Zn0.75Fe0.25)2(Ti0.6Fe0.3Nb0.1)18(O0.6(OH)0.3F0.1)O38

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.02

0.3

0.49

1.0079470

0.3023841
Oxygen

O

33.30

38.9

63.46

15.9994300

622.3778270
Fluorine

F

0.10

0.1

0.16

18.9984033

1.8998403
Sodium

Na

0.92

0.75

1.22

22.9897702

17.2423277
Titanium

Ti

27.66

10.8

17.62

47.8671000

516.9646800
Manganese

Mn

2.20

0.75

1.22

54.9380499

41.2035374
Iron

Fe

17.63

5.9

9.62

55.8452000

329.4866800
Zinc

Zn

5.25

1.5

2.45

65.4094000

98.1141000
Yttrium

Y

1.19

0.25

0.41

88.9058520

22.2264630
Niobium

Nb

8.95

1.8

2.94

92.9063820

167.2314876
Lead

Pb

2.77

0.25

0.41

207.2100000

51.8025000

Analysis wt%

TiO2 : 72.59, Fe2O3 : 6.77, FeO : 1.26, MnO : 4.12, ZnO : 10.85, Na2O : 1.36, K2O : 0.45, PbO : 2.10 (Ref: Canadian Mineralogist 78)

Strunz 9th edition incl. updates

4.CC.40

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
C: Metall: Sauerstoff = 2: 3,3: 5, und vergleichbare
C: Mit großen und mittelgroßen Kationen
40:Crichtonit-Gruppe

Lapis Classification

IV/C.09-010

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)
9: Crichtonit-Gruppe

Classification by Hölzel

4.CE.630

4: OXIDES
C: R2O3 Sesquioxides
E: Other complex Oxides, mostly hextrig
6: Freudenbergite-Group

Dana 8th edition

08.05.01.01

08: Multiple Oxides with Nb, Ta, and Ti
05: Multiple Oxides with Nb, Ta, and Ti
01: Crichtonite group (ABC18 T2 O38)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Crichtonite Group

Optical Properties

Color

schwarz-met.

Streak color

grau

Diaphaneity (Transparency)

opak, durchscheinend

Lustre

Halbmetallglanz

max. Birefringence

0.015
Birefringence chart\! Landauite title=Birefringence chart Landauite

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

2.373

RI value γ / ε

2.388

Ri mean

2.38

2V angle

Biaxial (-) 60°

Dispersion

schwach, r > v

Absorption

Z > Y > X

Pleochroism

stark, Schattierungen von grün

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

148

Space Group

R3

Cell parameters a (Å)

10.366

Cell parameters b (Å)

-

Cell parameters c (Å)

20.77

Cell parameters a/b or c/a

2.004

Cell parameters c/b

-

Z

3

Volume (ų)

1932.812

X-Ray Powder Diffraction

3.36(60),
3.02(60),
2.83(100),
2.21(70),
2.11(90),
1.780(80),
1.582(80),
1.429(80)
XRD chart Landauite

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)

7.5

VHN (Hardness Vickers)

1650 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.42 (gemessen) 4.46 (berechnet)

4.816 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Russland/Ferner Osten, Föderationskreis/Burjatien (Buryatia), Republik/Burpala

Preface

Author (Name, Year)

Portnov & Nikolaeva & Stolyarova, 1966

References

Minerals and Museums 5 (2004)

IMA group assignments

 
Crichtonite Group
 
 
 

 
 
Almeidaite
PbZn2(Mn,Y)(Ti,Fe3+)18O36(OH,O)2
trigonal
R3

 
 
Antipinite
KNa3Cu2(C2O4)4
triklin
P1

 
 
Botuobinskite
SrFe2+(Ti4+12Cr3+6)Mg2[O36(OH)2]
trigonal
R3

 
 
Cleusonite
(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38
trigonal
R3

 
 
Crichtonite
(Sr,Pb)(Mn,Fe)Fe3+2(Ti,Fe3+)18O38
trigonal
R3

 
 
Davidite-(Ce)
(Ce,La,U,Y)2Fe3+2(Ti,Fe3+)18O38
trigonal
R3

 
 
Davidite-(La)
La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
trigonal
R3

 
 
Dessauite-(Y)
(Sr,Pb)(Y,U)Fe3+2(Ti,Fe3+)18O38
trigonal
R3

 
 
Gramaccioliite-(Y)
(Pb,Sr)(Y,Mn)(Fe3+)2(Ti,Fe3+)18O38
trigonal
R3

 
 
Landauite
(Na,Pb)(Mn2+,Y)(Zn,Fe)2(Ti,Fe3+,Nb)18(O,OH,F)O38
trigonal
R3

 
 
Lindsleyite
(BaSr)Zr(Fe3+,Mg)2(Ti,Cr,Fe3+)18O38
trigonal
R3

 
 
Loveringite
(Ca,Ce)(Zr,Mg)(Ti,Fe3+)2(Ti,Cr,Fe3+)18O38
trigonal
R3

 
 
Mapiquiroite
(Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38
trigonal
R3

 
 
Mathiasite
K(Zr,Ca)(Fe3+,Mg)2(Ti,Cr,Fe3+)18O38
trigonal
R3

 
 
Mianningite
(☐,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2(Ti,Fe3+)18O38
trigonal
R3

 
 
Mirnyite
SrZr4+(Ti4+12Cr3+6)Mg2O38
trigonal
R3

 
 
Paseroite
PbMn2+(Mn2+,Fe2+)2(V5+,Ti,Fe3+,☐)18O38
triklin
R3

 
 
Romanite ?
(Fe2+,U,Pb)2(Ti,Fe3+)O4
 
 

 
 
Saranovskite
SrCaFe2+2(Cr4Ti2)Ti12O38
trigonal
R3

 
 
Senaite
Pb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38
trigonal
R3

 
 
Unnamed (HBU UK-4)
NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38
trigonal
R3

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Actuality: 24. Jan 2025 - 02:46:31

Other languages

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Spanish

Landauíta

Russian

Ландауит

Japanese

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CNMNC (IMA)-Number

IMA 1965-033

CNMNC symbol

Symbol

Lda

Locations with GPS information

IDs

GUSID (Global unique identifier short form) BbfiunHlwEaNaTyq4W3QUw
GUID (Global unique identifier) BAE2B705-E571-46C0-8D69-3CAAE16DD053
Database ID 2122