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Plumbobetafite (Plumbobetafit)

Collectors Summary

Color braun, gelb
Lustre Diamantglanz
Hardness (Mohs) 4.5 - 5.5
Cleavages fehlt
Fracture uneben
Crystal System kubisch, Fd3m

Additional information / Summary

Als Mineral diskreditert - The Canadian Mineralogist Vol. 48, pp. 673-698 (2010); Plumbobetafite von Ganzeev et al. (1969) ist ein nullwertiges-dominates Mitglied der Pyrochlor-Gruppe. Plumbobetafit von Voloshin et al. (1993) ist ein Plumbobetafit

Chemism

Chemical formula

(Pb,U,Ca)(Ti,Nb)2O6(OH,F)

Chemical composition

Blei, Calcium, Niob, Titan, Fluor, Sauerstoff, Uran, Wasserstoff

Unit weight: 431.4980684625 u; Number of atoms in the formula: 10.75

Info

Empirical formula:

(Pb0.6U0.3Ca0.1)(Ti0.75Nb0.25)2O6((OH)0.75F0.25)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.18

0.75

6.98

1.0079470

0.7559603
Oxygen

O

25.03

6.75

62.79

15.9994300

107.9961525
Fluorine

F

1.10

0.25

2.33

18.9984033

4.7496008
Calcium

Ca

0.93

0.1

0.93

40.0784000

4.0078400
Titanium

Ti

16.64

1.5

13.95

47.8671000

71.8006500
Niobium

Nb

10.77

0.5

4.65

92.9063820

46.4531910
Lead

Pb

28.81

0.6

5.58

207.2100000

124.3260000
Uranium

U

16.55

0.3

2.79

238.0289130

71.4086739

Analysis wt%

Nb2O5 : 30.96, Ta2O5 : 1.65, TiO2 : 13.30, Fe2O3 : 1.14, PbO : 20.70, UO2 : 1.70, UO3 : 13.73, Ln2O3 : 4.63, Ce2O3 : 2.82, La2O3 : 0.97, CaO : 2.11, Na2O : 0.83, SO3 : 0.55, SiO2 : 2.15, H2O : 2.62, F : 1.51, Ln2O3 : 4.63 (Ref: Tr.Min.69)

Strunz 9th edition incl. updates

4.DH.15

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
H: Mit großen (± mittelgroßen) [Kationen]; Lagen kantenverknüpfter Oktaeder
15:Pyrochlor-Gruppe

Classification by Hölzel

4.CJ.981

4: OXIDES
C: R2O3 Sesquioxides
J: Betafite-Group, Ti-dominant on the B-site

Dana 8th edition

08.02.03.03

08: Multiple Oxides with Nb, Ta, and Ti
02: Multiple Oxides with Nb, Ta, and Ti where (A)2 (B2O6) (O,OH,F)
03: Pyrochlore Group (Betafite Subgroup; 2(Ti)>(Ta+Nb)

IMA status

diskreditiert - The Canadian Mineralogist Vol. 48, pp. 673-698 (2010)

Mineral status

Varietät

Variety / polytype of

Pyrochlore supergroup

Optical Properties

Color

braun, gelb

Diaphaneity (Transparency)

durchscheinend bis opak

Lustre

Diamantglanz

2V angle

Isotropisch

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell parameters a (Å)

10.33

Cell parameters b (Å)

-

Cell parameters c (Å)

-

Cell parameters a/b or c/a

1

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

8

Volume (ų)

1102.303

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.5 - 5.5

Density (g/cm³)

4.64

5.2 ( ρ calc. Mineralienatlas )

Cleavages

fehlt

Fracture

uneben

Radioactivity

radioaktiv

(Co-)Type locality

(Co-)Type locality

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

Preface

Author (Name, Year)

Ganzeev & Efimov & Lyubomilova, 1969

References

Trudy Mineralogicheskogo Muzeya Akademiya Nauk SSSR 19 (1969), 135

Other languages

German

Plumbobetafit

Spanish

Plumbobetafita

French

Plumbobetafite

English

Plumbobetafite

Russian

Плюмбобетафит

Japanese

ﾌﾟﾗﾝﾎﾞﾍﾞﾀﾎ石

Locations with GPS information

IDs

GUSID (Global unique identifier short form) jFM61tn_mkibJDC5INm4bg
GUID (Global unique identifier) D63A538C-FFD9-489A-9B24-30B920D9B86E
Database ID 3082