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Ceriopyrochlore-(Ce)

Pictures (2 Images total)

braun-schwarzer Ceriopyrochlor-(Ce)
Views (Image: 1209493219): 1689
braun-schwarzer Ceriopyrochlor-(Ce)

Größe: 7.5 x 5 x 3.5 cm; Fundort: Katugin Ta-­Nb-Lagerstätte, Chitinskaya Oblast, Transbaikalia, östliches Sibirien, Russland

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2008-04-29
Locality: Katugin Ta-Nb-Lagerstätte (Katuginskoye) / Transbaikalien, Region (Zabaykalsky Krai) / Sibirien, Föderationskreis / Russland
Ceriopyrochlor-(Ce)
Views (Image: 1632218471): 61
Ceriopyrochlor-(Ce) (SNr: AR-CePy-1-1-1)

Oktaedrischer Ceriopyrochlor aus dem Albitit der Alpe Rosso, gefunden in Orcesco am Ende der Seilbahn an der Erzverladestelle (nahe der Eisenbahnverbindung zwischen Druogno und Coimo). Bildbreite e...

Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2021-09-21
Locality: Orcesco / Druogno / Vigezzo, Valle (Tal) / Verbano-Cusio-Ossola, Provinz / Piemont (Piemonte), Region / Italien

Collectors Summary

Color harzbraun, hellbraun, dunkelbraun
Streak color gelblich braun
Hardness (Mohs) 5.25
Cleavages fehlt
Crystal System kubisch, Fd3m

Additional information / Summary

Varietät der Pyrochlor-Supergruppe oder Fluorkenopyrochlor

Chemism

Chem­ical formula

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

Chem­ical com­po­si­tion

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

Unit weight: 494.281555395 u; Number of atoms in the formula: 13.1

Info

Empirical formula:

(Ca0.55Ce0.3Y0.1Na0.05)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

0.43

2.1

16.03

1.0079470

2.1166887

Oxygen

O

20.39

6.3

48.09

15.9994300

100.7964090

Fluorine

F

2.69

0.7

5.34

18.9984033

13.2988823

Sodium

Na

0.47

0.1

0.76

22.9897702

2.2989770

Calcium

Ca

8.92

1.1

8.40

40.0784000

44.0862400

Yttrium

Y

3.60

0.2

1.53

88.9058520

17.7811704

Niobium

Nb

28.19

1.5

11.45

92.9063820

139.3595730

Cerium

Ce

17.01

0.6

4.58

140.1161000

84.0696600

Tantalum

Ta

18.30

0.5

3.82

180.9479100

90.4739550

Anal­y­sis wt%

Nb2O5 : 47.63, Ta2O5 : 2.76, TiO2 : 4.21, ZrO2 : 2.67, Al2O3 : 1.40, Fe2O3 : 3.34, MnO : 0.71, SiO2 : 3.22, U3O8 : 1.62, CaO : 2.12, PbO : 5.03, La2O3 : 2.90, CeO2 : 10.29, Pr6O11 : 1.18, Nd2O3 : 1.86, Sm2O3 : 0.63, Y2O3 : 1.50, Na2O : 1.66, H2O : 3.13, F : 1.28, Ln2O3 : 18.60 (Ref: Bull.Inst.Min.Dep., Chin.Acad.Geol.Sci.1985)

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.913

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

Dana 8th edi­tion

08.02.01.05

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

harzbraun, hellbraun, dunkelbraun

Streak color

gelblich braun

Diaphane­ity (Trans­parency)

transparent

RI value α / ω / n

1.968

Ri mean

1.968

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell param­e­ters a (Å)

10.388

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)

1120.975

X-Ray Pow­der Diffrac­tion

3.7(30),
3.3(60),
3.0(100),
2.56(30),
2.46(30),
1.82(40),
1.533(30),
1.510(30)

XRD chart Ceriopyrochlore-(Ce)

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.25

Density (g/cm³)

4.13

5.857 ( ρ calc. Mineralienatlas )

Cleav­ages

fehlt

(Co-)Type locality

(Co-)Type locality

USA/Wisconsin/Marathon Co./Rib Mountain/Wausau Plateau

Preface

Name from

Jean Charles Galissard de Marignac

Jean-Charles Galissard de Marignac (geboren am 24. April 1817 in Genf; † 15. April 1894 ebenda) war ein Schweizer Chemiker und Entdecker von Gd und Yb. WikiPedia:Jean_Charles_Galissard_de_Marignac

Author (Name, Year)

Weidman & Lehner, 1907

Other languages

Spanish

Ceriopirocloro-(Ce)

German

Ceriopyrochlor-(Ce)

English

Ceriopyrochlore-(Ce)

French

Ceriopyrochlore-(Ce)

Russian

Цериопирохлор-(Ce)

Alternative Name

Ceriopyrochlore

Marignacit

Marignacita

Marignacite

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

German pages

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English pages

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Russian pages

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Locations with GPS information