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Yttrobetafite-(Y)

Pictures (2 Images total)

Yttrobetafit-(Y)
Views (File:
1109789571
): 5791
Yttrobetafit-(Y)
Idiomorpher, ca. 2 cm großer, rötlichgrauer Kristall; Fundort: Alakartti-Pegmatit, Murmanskaja Oblast, Russland; Herkunft: ex collection geol.min. Museum Apatity
Copyright: Collector; Contribution: Mineralienatlas
Collection: Collector
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kandalakscha, Rajon/Alakurtti/Alakurtti Pegmatit
Mineral: Yttrobetafite-(Y)
Encyclopedia: idiomorph
Image: 1109789571
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Yttrobetafit-(Y)

Idiomorpher, ca. 2 cm großer, rötlichgrauer Kristall; Fundort: Alakartti-Pegmatit, Murmanskaja Oblast, Russland; Herkunft: ex collection geol.min. Museum Apatity

Collection: Collector
Copyright: Collector
Contribution: Mineralienatlas 2005-03-02
Locality: Alakurtti Pegmatit / Alakurtti / Kandalakscha, Rajon / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland
Yttrobetafit-(Y)
Views (File:
1245176016
): 1099
Yttrobetafit-(Y)
Größe: 45x28x14 mm; Fundort: Alakurtti-Pegmatit, Karelien, Russland
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kandalakscha, Rajon/Alakurtti/Alakurtti Pegmatit
Mineral: Yttrobetafite-(Y)
Image: 1245176016
License: Usage for Mineralienatlas project only
Yttrobetafit-(Y)

Größe: 45x28x14 mm; Fundort: Alakurtti-Pegmatit, Karelien, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-16
Locality: Alakurtti Pegmatit / Alakurtti / Kandalakscha, Rajon / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color grünlich, graugrün, rötlich
Crystal System amorph,
Morphology Kristallin, körnig, sehr selten idiomorphe Kristalle

Additional information / Summary

Als eigenständiges Mineral diskreditiert;

Yttrobetafite-(Y) von Kalita (1959) und Liferovich & Mitchell (2005) sind nullwertig-dominate Mitglieder der Pyrochlor-Gruppe.

Yttrobetafite-(Y) vom Mond (Meyer & Yang 1988) ist Oxycalciobetafit

Chemism

Chemical formula

(Y,U,Ce)2(Ti,Nb,Ta)2O6(OH)

Chemical composition

Cerium, Niob, Tantal, Titan, Yttrium, Sauerstoff, Uran, Wasserstoff

Unit weight: 539.9054784 u; Number of atoms in the formula: 12

Info

Empirical formula:

(Y0.6U0.3Ce0.1)2(Ti0.6Nb0.3Ta0.1)2O6(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.19

1

8.33

1.0079470

1.0079470

Oxygen

O

20.74

7

58.33

15.9994300

111.9960100

Titanium

Ti

10.64

1.2

10.00

47.8671000

57.4405200

Yttrium

Y

19.76

1.2

10.00

88.9058520

106.6870224

Niobium

Nb

10.32

0.6

5.00

92.9063820

55.7438292

Cerium

Ce

5.19

0.2

1.67

140.1161000

28.0232200

Tantalum

Ta

6.70

0.2

1.67

180.9479100

36.1895820

Uranium

U

26.45

0.6

5.00

238.0289130

142.8173478

Analysis wt%

Nb2O5 : 36.35, Ta2O5 : 8.50, TiO2 : 14.90, Fe2O3 : 4.00, Al2O3 : 0.98, MnO : 1.10, CaO : 1.66, UO3 : 5.80, ThO2 : 0.90, Y2O3 : 5.12, Ce2O3 : 4.01, SiO2 : 3.92, H2O : 11.73, Ln2O3 : 9.13 (Ref: Tr.Inst.62)

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.982

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

Dana 8th edition

08.02.03.02

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

grünlich, graugrün, rötlich

Diaphaneity (Transparency)

durchscheinend bis opak

RI value α / ω / n

2.34

Ri mean

2.34

2V angle

Isotropisch

Crystallography

Crystal System

amorph

Cell parameters a (Å)

6.531

Cell parameters b (Å)

-

Cell parameters c (Å)

5.963

Cell parameters a/b or c/a

0.913

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

0.

Volumne (ų)

254.3

X-Ray Powder Diffraction

3.258(80),
2.985(70),
2.501(60),
1.694(100),
1.631(30),
1.369(20),
1.180(60),
1.104(30)

XRD chart Yttrobetafite-(Y)

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

Morphology

Kristallin, körnig, sehr selten idiomorphe Kristalle

Crystals 3D

Open larger view

Physical Properties

Density (g/cm³)

3.65 - 4.9 / Durchschnittlich = 4.27

Preface

Author (Name, Year)

Kalita & Bykova & Kukharchik, 1962

References

American Mineralogist (1964): 49: 440.

American Mineralogist (1977): 62: 403-410.

American Mineralogist (1988): 73: 1420.

Strunz Mineralogical Tables 9. Edition (2001), 223.

The Pyrochlore Supergroup of Minerals: Nomenclature; The Canadian Mineralogist Vol. 48, pp. 673-698 (2010)

Other languages

Spanish

Itrobetafita-(Y)

German

Yttrobetafit-(Y)

English

Yttrobetafite-(Y)

French

Yttrobetafite-(Y)

Russian

Иттробетафит-(Y)

Alternative Name

English

Titano-obruchevite

Yttrobetafit

Yttrobetafita

Yttrobetafite

Locations with GPS information