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Uranopyrochlore

Pictures (2 Images total)

Uranpyrochlor
Views (Image: 1245131336): 2330
Uranpyrochlor

Größe: 50x30x15 mm; Fundort: Tazheran Syenit-Massiv, Baikalsee, Irkutsk Oblast, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-16
Locality: Tazheran Syenit-Massiv / Baikalsee / Irkutsk (Irkutskaja), Oblast / Sibirien, Föderationskreis / Russland
Uranopyrochlor
Views (Image: 1560589751): 581
Uranopyrochlor

Schelingen, Kaiserstuhl, Baden-Württemberg, Deutschland. Bildbreite 1,5 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2019-06-15
Locality: Schelingen / Vogtsburg im Kaiserstuhl / Breisgau-Hochschwarzwald, Landkreis / Freiburg, Bezirk / Baden-Württemberg / Deutschland

Collectors Summary

Color gelbbraun, rot, rötlichbraun, schwarz
Streak color bräunlich gelb
Hardness (Mohs) 4.25
Cleavages fehlt
Crystal System kubisch, Fd3m

Additional information / Summary

Umbenannt von Uranpyrochlor in Uranopyrochlor. In allen studierten Fällen ist das U-Kation nicht die dominante Valenz an der A Position. Mit Ausnahme der Probe von Chakhmouradian and Mitchell (2002). Unabhängig davon ist es nicht möglich das dominate Anion auf der dominaten Valenz auf der Y-Seite des Minerals festzulegen. Daher sollten alle Uranpyrochlor in Uranopyrochlor umbenannt werden. Der Uranopyrochlor von Hogarth und Horne (1998) ist Natropyrochlor.

Chemism

Chem­ical formula

(Ca,U,Na,Ce)2(Nb,Ta)2(O,OH,F)7

Chem­ical com­po­si­tion

Calcium, Cerium, Natrium, Niob, Tantal, Fluor, Sauerstoff, Uran, Wasserstoff

Unit weight: 551.558659815 u; Number of atoms in the formula: 13.1

Info

Empirical formula:

(Ca0.55U0.3Na0.1Ce0.05)2(Nb0.75Ta0.25)2(O0.6(OH)0.3F0.1)7

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.38

2.1

16.03

1.0079470

2.1166887

Oxygen

O

18.27

6.3

48.09

15.9994300

100.7964090

Fluorine

F

2.41

0.7

5.34

18.9984033

13.2988823

Sodium

Na

0.83

0.2

1.53

22.9897702

4.5979540

Calcium

Ca

7.99

1.1

8.40

40.0784000

44.0862400

Niobium

Nb

25.27

1.5

11.45

92.9063820

139.3595730

Cerium

Ce

2.54

0.1

0.76

140.1161000

14.0116100

Tantalum

Ta

16.40

0.5

3.82

180.9479100

90.4739550

Uranium

U

25.89

0.6

4.58

238.0289130

142.8173478

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.CH.911

4: OXIDES
C: R2O3 Sesquioxides
H: Pyrochlore-Group, Nb-dominant on the B-site

Dana 8th edi­tion

08.02.01.07

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

IMA sta­tus

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

Min­eral sta­tus

Varietät

Var­i­ety / poly­type of

Pyrochlore supergroup

Optical Properties

Color

gelbbraun, rot, rötlichbraun, schwarz

Streak color

bräunlich gelb

Diaphane­ity (Trans­parency)

durchscheinend bis opak

RI value α / ω / n

1.89

Ri mean

1.89~

2V angle

Isotropisch

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz bekannt

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell param­e­ters a (Å)

10.36

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

Volumne (ų)

1111.935

X-Ray Pow­der Diffrac­tion

7.3(40),
3.01(100),
2.61(30),
1.84(80),
1.72(10),
1.575(60),
1.202(20),
1.168(20)

XRD chart Uranopyrochlore

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4.25

Density (g/cm³)

4.509 (gemessen)

6.589 ( ρ calc. Mineralienatlas )

Cleav­ages

fehlt

(Co-)Type locality

(Co-)Type locality

USA/North Carolina/Mitchell Co./Mitchell County Mica Mines

Preface

Author (Name, Year)

Holmquist, 1896

References

American Mineralogist 62 (1977), 403

Mineralogical Magazine 53 (1989), 257

Handbook of Mineralogy (Anthony et al.), 3 (1997), 587

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

Other languages

German

Uranopyrochlor

English

Uranopyrochlore

Spanish

Uranpirocloro

Russian

Уранпирохлор

Japanese

ウランパイロクロア

old name

German

Uranpyrochlor

French

Uranpyrochlore

English

Uranpyrochlore

Alternative Name

Ellsworthit

Ellsworthita

Ellsworthite

Hatchettolit

Hatchettolita

Hatchettolite

Hattchetolit

German

Samiresit

Spanish

Samiresita

English

Samiresite

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Uranopyrochlor
Google-Bilder-Suche - search for: Uranopyrochlor
Mineralienatlas.de (Forum) - search for: Uranopyrochlor

English pages

Mindat - search for: Uranopyrochlore
Webmineral - search for:Uranopyrochlore
Handbook-of-Mineralogy - search for: Uranopyrochlore
RRUFF - Raman, XRD and other mineral data - search for: Uranopyrochlore
RRUFF - References and PDF downloads - search for: Uranopyrochlore
American-Mineralogist-Crystal-Structure-Database - search for: Uranopyrochlore
Strahlen.org - search for: Uranopyrochlore

Russian pages

Webmineral.ru - search for: Уранпирохлор

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Uranopyrochlor
Crystal-Treasure.com - search for: Uranopyrochlor
Bosse - search for: Uranopyrochlor
Edelsteine Neuburg - Gundolf Fischer - search for: Uranopyrochlor

Locations with GPS information