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Pyrochlore group (Pyrochlor-Gruppe)

Pictures (59 Images total)

Pyrochlor
Views (Image: 1322733965): 4314, Rating: 9.73
Pyrochlor

Bildbreite: 2,2 mm; Fundort: Serra de Agua de Pau, Sao Miguel, Insel, Azoren, Portugal

Copyright: Jean-Marc Johannet
Contribution: Hg 2011-12-01
Locality: Serra de Agua de Pau / Lagoa, Kreis / Sao Miguel, Insel / Azoren (Ilhas dos Açores), Autonome Region / Portugal
Pyrochlor mit Biotit
Views (Image: 1303929080): 2934
Pyrochlor mit Biotit

Größe: 0,23 und 1,61 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2011-04-27
Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Pyrochlor
Views (Image: 1266916441): 4621, Rating: 8.92
Pyrochlor

Bildbreite: 2 mm; Fundort: In den Dellen (Bimsgrube Zieglowski), Mendig, Eifel, Deutschland

Copyright: Fred Kruijen
Contribution: Hg 2010-02-23
Locality: In den Dellen (Grube Zieglowski) / Mendig, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Pyrochlor
Views (Image: 1167410460): 1735, Rating: 8.5
Pyrochlor

Bildbreite: 4 mm; Fundort: Laacher See-Vulkangebiet, Eifel, Deutschland

Copyright: Stephan Wolfsried
Contribution: Hg 2006-12-29
Locality: Laacher See / Ahrweiler, Landkreis / Rheinland-Pfalz / Deutschland
Pyrochlor
Views (Image: 1322733908): 1726, Rating: 8.75
Pyrochlor

Bildbreite: 1,6 mm; Fundort: Serra de Agua de Pau, Sao Miguel, Insel, Azoren, Portugal

Copyright: Jean-Marc Johannet
Contribution: Hg 2011-12-01
Locality: Serra de Agua de Pau / Lagoa, Kreis / Sao Miguel, Insel / Azoren (Ilhas dos Açores), Autonome Region / Portugal
Pyrochlor
Views (Image: 1185739005): 1058
Pyrochlor

Fundort: In den Dellen, Mendig, Laacher See, Eifel, Rheinland-Pfalz, Deutschland; Bildbreite: 1,7 mm

Collection: Willi Schüller, Adenau
Copyright: Fred Kruijen
Contribution: Fred Kruijen 2007-07-29
Locality: Mendig, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Collectors Summary

Color braun, gelblichbraun, gelb, grünlich braun, rötlichbraun
Streak color gelblich braun
Cleavages {111} undeutlich, {111} undeutlich, {111} undeutlich
Crystal System kubisch, Fd3m

Additional information / Summary

Die bisher als Pyrochlor bezeichneten Mineralien sind entweder Oxynatropyrochlor, Hydroxycalciopyrochlor, Fluorcalciopyrochlor oder Fluorkenopyrochlor - The Canadian Mineralogist Vol. 48, pp. 673-698 (2010)

Chemism

Chem­ical formula

A2Nb2(O,OH)6Z

Addi­tional chem. informa­tion

A = Na, Ca, Sn2+, Sr, Pb2+, Sb3+, Y, U4+, H2O oder ◻.

Chem­ical com­po­si­tion

Niob, Sauerstoff, Wasserstoff

Unit weight: 283.3212645 u; Number of atoms in the formula: 9.5

Info

Empirical formula:

A2Nb2(O0.75(OH)0.25)6Z

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.53

1.5

15.79

1.0079470

1.5119205

Oxygen

O

33.88

6

63.16

15.9994300

95.9965800

Niobium

Nb

65.58

2

21.05

92.9063820

185.8127640

Strunz 9th edi­tion incl. updates

4.DH.

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

Clas­sifica­tion by Hölzel

4.CH.

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

IMA sta­tus

diskreditiert - Name für eine Mineralgruppe - The Canadian Mineralogist Vol. 48, pp. 673-698 (2010)

Min­eral sta­tus

Reihe/Gruppe/Serie/Folge

IMA Classification

IMA Clas­sifica­tion

Pyrochlore supergroup

Optical Properties

Color

braun, gelblichbraun, gelb, grünlich braun, rötlichbraun

Streak color

gelblich braun

Diaphane­ity (Trans­parency)

teilweise durchscheinend bis opak

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz bekannt

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

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

X-Ray Pow­der Diffrac­tion

5.98(20),
3.13(20),
3.00(100),
2.60(20),
1.838(60),
1.568(50),
1.502(10),
1.194(20)

XRD chart Pyrochlore group

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

Physical Properties

Density (g/cm³)

4.2 - 6.4 / Durchschnittlich = 5.3

Cleav­ages

{111} undeutlich, {111} undeutlich, {111} undeutlich

Preface

Name from

Zur Namensgebung für die Pyrochlor-Gruppe siehe: Daniel Atencio, Marcelo B. Andrade, Andrew G. Christy, Reto Gieré, Pavel M. Kartashov: The pyrochlore supergroup of minerals: nomenclature. Can. Mineral. 48 (2010) S. 673-698.

Author (Name, Year)

Wöhler, 1826

Addi­tional Informa­tion

Pyrochlor ist das Primärerz zur Gewinnung von Niob.

References

American Mineralogist 62 (1977), 403

IMA group assignments

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

'Pyrochlore group'

A2Nb2(O,OH)6Z

kubisch : m3m : Fd3m

4.DH.

Thorutite

(Th,U,Ca)Ti2(O,OH)6

monoklin : 2/m : C2/m

4.DH.05

Brannerite

(U,Ca,Y,Ce)(Ti,Fe)2O6

monoklin : 2/m : C2/m

4.DH.05

Orthobrannerite

U4+U6+Ti4O12(OH)2

orthorhombisch : 222 : P2122

4.DH.05

Kassite

CaTi2O4(OH)2

monoklin : 2/m : P21/a

4.DH.10

Lucasite-(Ce)

(Ce,La)Ti2(O,OH)6

monoklin : 2/m : I2/a

4.DH.10

'Betafite (of Hogarth 1977)' (Var.v. Pyrochlore supergroup)

(Ca,Na,U)2(Ti,Nb,Ta)2O6(OH)

kubisch : m3m : Fd3m

4.DH.15

Hydroplumboelsmoreite

(Pb,☐)2(W,Fe3+)2O6(H2O)

kubisch : m3m : Fd3m

4.DH.15

Fluornatrocoulsellite

CaNa3AlMg3F14

trigonal : 3m : R3m

4.DH.15

Hydroxymanganopyrochlore

(Mn,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH)

kubisch : m3m : Fd3m

4.DH.15

'Alumotungstite' (Var.v. Hydrokenoelsmoreite)

(H2O,Ca)x(W,Al)2(O,OH)6·nH2O

4.DH.15

'Calciobetafite' (Var.v. Pyrochlore supergroup)

Ca2(Ti,Nb)2(O,OH)7

kubisch : m3m : Fd3m

4.DH.15

'Cesstibtantite' (Var.v. Pyrochlore supergroup)

(Cs,Na)SbTa4O12

kubisch : m3m : Fd3m

4.DH.15

'Ferritungstite' (Var.v. Hydrokenoelsmoreite)

(W6+,Fe3+)2(O,OH)6·n(H2O,K,Ca,Na)

kubisch : m3m : Fd3m

4.DH.15

Hydropyrochlore

(H2O,☐)2Nb2(O,OH)6(H2O)

kubisch : m3m : Fd3m

4.DH.15

'Plumbobetafite' (Var.v. Pyrochlore supergroup)

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

kubisch : m3m : Fd3m

4.DH.15

'Stibiobetafite' (Var.v. Pyrochlore group)

(Sb3+,Ca)2(Ti,Nb,Ta)2(O,OH)7

kubisch : m3m : Fd3m

4.DH.15

'Uranmicrolite' (Var.v. Microlite group)

(Ca,U)2(Ta,Nb)2O6(OH,F)

kubisch : m3m : Fd3m

4.DH.15

'Uranopyrochlore' (Var.v. Pyrochlore supergroup)

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

kubisch : m3m : Fd3m

4.DH.15

'Bariomicrolite'

Ba(Ta,Nb)2(O,OH)7

kubisch : m3m : Fd3m

4.DH.15

'Bariopyrochlore' (Var.v. Pyrochlore supergroup)

(Ba,Sr)(Nb,Ti)2(O,OH)7

kubisch : m3m : Fd3m

4.DH.15

'Natrobistantite' (Var.v. Microlite group)

(Na,Cs)Bi(Ta,Nb,Sb)4O12

4.DH.15

'Plumbomicrolite' (Var.v. Microlite group)

(Pb,Na,Ca)2(Ta,Nb)2(O,OH)7

kubisch : m3m : Fd3m

4.DH.15

'Plumbopyrochlore' (Var.v. Pyrochlore group)

(Pb,Y,U,Ca)2-xNb2O6(OH)

kubisch : m3m : Fd3m

4.DH.15

'Stannomicrolite' (Var.v. Microlite group)

(Sn2+,Fe2+)(Ta,Nb,Sn4+)2(O,OH)7

kubisch : m3m : Fd3m

4.DH.15

'Stibiomicrolite' (Var.v. Microlite group)

(Sb,Ca,Na)2(Ta,Nb)2(O,OH)7

kubisch : m3m : Fd3m

4.DH.15

'Bismutomicrolite'

(Bi,Ca)(Ta,Nb)2O6(OH)

kubisch : m3m : Fd3m

4.DH.15

'Bismutopyrochlore' (Var.v. Pyrochlore supergroup)

(Bi,U,Ca,Pb)1+x(Nb,Ta)2O6(OH)·nH2O

kubisch : m3m : Fd3m

4.DH.15

Oxynatromicrolite

(Na,Ca,U)2(Ta,Nb)2O6(O,F)

kubisch : m3m : Fd3m

4.DH.15

'Yttrobetafite-(Y)' (Var.v. Pyrochlore supergroup)

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

amorph

4.DH.15

'Strontiopyrochlore' (Var.v. Pyrochlore group)

Sr0.6Nb2(O,OH)7

kubisch : m3m : Fd3m

4.DH.15

Cesiokenopyrochlore

☐Nb2(O,OH)6Cs1−x {x ∼ 0.20}

kubisch : m3m : Fd3m

4.DH.15

Hydrokenoelsmoreite

WO3·0.5H2O

kubisch : m3m : Fd3m

4.DH.15

Hydrokenomicrolite

(◻,H2O)2Ta2(O,OH)6(H2O)

kubisch : m3m : Fd3m

4.DH.15

Oxybismutomicrolite

(Bi1.33☐0.67)Σ2Ta2O6O

kubisch : m3m : Fd3m

4.DH.15

Oxycalciomicrolite

Ca2Ta2O7

kubisch : m3m : Fd3m

4.DH.15

Oxystannomicrolite

Sn2Ta2O6O

kubisch : m3m : Fd3m

4.DH.15

Oxystibiomicrolite

(Sb3+,Ca)2Ta2O6O

4.DH.15

'Yttropyrochlore-(Y)' (Var.v. Pyrochlore group)

(Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7

4.DH.15

'Ceriopyrochlore-(Ce)' (Var.v. Pyrochlore supergroup)

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

kubisch : m3m : Fd3m

4.DH.15

Fluornatromicrolite

(Na,Ca,Bi)2(Ta,Nb)2O6F

kubisch : m3m : Fd3m

4.DH.15

Fluornatropyrochlore

(Na,Pb,Ca,REE,U)2Nb2O6F

kubisch : m3m : Fd3m

4.DH.15

Hydrokenopyrochlore

2Nb2O4(OH)2(H2O)

kubisch : m3m : Fd3m

4.DH.15

Hydroxyferroroméite

(Fe2+1.50.5)Sb5+2O6(OH)

kubisch : m3m : Fd3m

4.DH.15

Kenoplumbomicrolite

(Pb,◻)2Ta 2O6(◻,O,OH)

kubisch : m3m : Fd3m

4.DH.15

Oxycalciopyrochlore

Ca2Nb2O6O

4.DH.15

Fluorcalciomicrolite

(Ca,Na)2Ta2(O,OH)6F

kubisch : m3m : Fd3m

4.DH.15

Hydroxykenoelsmoreite

(☐,Pb)2(W,Fe3+,Al)2(O,OH)6(OH)

trigonal : 3 : R3

4.DH.15

Hydroxykenomicrolite

(◻,Na,Sb3+)2Ta2O6(OH)

kubisch : m3m : Fd3m

4.DH.15

Hydroxykenopyrochlore

(☐,Ce,Ba)2(Nb,Ti)2O6(OH,F)

kubisch : m3m : Fd3m

4.DH.15

Fluorcalciopyrochlore

(Ca,Na)2(Nb,Ti)2O6F

kubisch : m3m : Fd3m

4.DH.15

Hydroxynatropyrochlore

(Na,Сa,Ce)2Nb2O6(OH)

kubisch : m3m : Fd3m

4.DH.15

Hydroxycalciomicrolite

Ca1.5Ta2O6(OH)

kubisch : 432 : P4332

4.DH.15

Hydroxyplumbopyrochlore

(Pb1.50.5)Nb2O6(OH)

kubisch : m3m : Fd3m

4.DH.15

Hydroxycalciopyrochlore

(Ca,Na,U,☐)2(Nb,Ti)2O6(OH)

kubisch : m3m : Fd3m

4.DH.15

Fluorcalcioroméite

(Ca,Na)2Sb5+2O6(F,OH)

kubisch : m3m : Fd3m

4.DH.15d

Hydroxycalcioroméite

(Ca,Sb3+)2(Sb5+,Ti4+)2O6(OH)

kubisch : m3m : Fd3m

4.DH.20

'Partzite'

Cu2Sb2(O,OH)7

kubisch : m3m : Fd3m

4.DH.20

'Monimolite' (Var.v. Roméite group)

(Pb,Ca)3Sb2O8

4.DH.20

Oxyplumboroméite

Pb2Sb5+2O7

kubisch : m3m : Fd3m

4.DH.20

'Stibiconite' (Var.v. Roméite group)

Sb3+Sb5+2O6(OH)

kubisch : m3m : Fd3m

4.DH.20

Cuproroméite

Cu2Sb2(O,OH)7

kubisch : m3m : Fd3m

4.DH.20

'Stetefeldtite' (Var.v. Roméite group)

Ag2Sb2(O,OH)7

kubisch : m3m

4.DH.20

'Bismutostibiconite'

(Bi,Fe3+,☐)2Sb5+2O7

kubisch : m3m : Fd3m

4.DH.20

Oxycalcioroméite

Ca2Sb2O6O

kubisch : m3m : Fd3m

4.DH.20

Rosiaite

PbSb2O6

trigonal : 3m : P31m

4.DH.25

Laachite

(Ca,Mn)2Zr2Nb2TiFeO14

monoklin : 2/m : C2/c

4.DH.30

'Zirconolite'

CaZrTi2O7

4.DH.30

Stefanweissite

(Ca,REE)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14

orthorhombisch : mmm : Cmca

4.DH.30

Zirconolite-2M

(Ca,Y)Zr(Ti,Mg,Al)2O7

monoklin : 2/m : C2/c

4.DH.30

'Zirconolite-3O' (Pol.v. Zirconolite-2M)

(Ca,Fe,Y,Th)2Fe(Ti,Nb)3Zr2O14

orthorhombisch : mmm : Acam

4.DH.30

'Zirconolite-3T' (Pol.v. Zirconolite-2M)

CaZrTi2O7

trigonal : 32 : P3121

4.DH.30

Nöggerathite-(Ce)

(Ce,Ca)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14

orthorhombisch : mmm : Cmca

4.DH.30

Liandratite

U6+(Nb,Ta)2O8

trigonal : 3m : P31m

4.DH.35

Petscheckite

U4+Fe2+Nb2O8

trigonal : 3m : P31m

4.DH.35

Pittongite

Na0.22[(W,Fe3+)(O,OH)3·0.44H2O

hexagonal : 6m2 : P6m2

4.DH.45

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

'Pyrochlore group'

A2Nb2(O,OH)6Z

kubisch : m3m : Fd3m

4.CH.

Fluornatropyrochlore

(Na,Pb,Ca,REE,U)2Nb2O6F

kubisch : m3m : Fd3m

4.CH.020

Oxynatropyrochlore

(Na,Ca,U)2Nb2O6(O,OH)

4.CH.040

Hydroxycalciopyrochlore

(Ca,Na,U,☐)2(Nb,Ti)2O6(OH)

kubisch : m3m : Fd3m

4.CH.110

Hydroxymanganopyrochlore

(Mn,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH)

kubisch : m3m : Fd3m

4.CH.119

Fluorcalciopyrochlore

(Ca,Na)2(Nb,Ti)2O6F

kubisch : m3m : Fd3m

4.CH.120

Oxycalciopyrochlore

Ca2Nb2O6O

4.CH.140

'Stibiobetafite' (Var.v. Pyrochlore group)

(Sb3+,Ca)2(Ti,Nb,Ta)2(O,OH)7

kubisch : m3m : Fd3m

4.CH.141

Fluorstrontiopyrochlore

(Sr,☐)2Nb2(O,OH)6F

4.CH.320

Oxyplumbopyrochlore

Pb2Nb2O6O

4.CH.440

'Plumbopyrochlore' (Var.v. Pyrochlore group)

(Pb,Y,U,Ca)2-xNb2O6(OH)

kubisch : m3m : Fd3m

4.CH.461

Kenoplumbopyrochlore

(Pb,☐)Nb2 O6(☐,O)

4.CH.480

Oxyyttropyrochlore-(Y)

(Y,☐) 2Nb2O6O

4.CH.640

'Yttropyrochlore-(Y)' (Var.v. Pyrochlore group)

(Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7

4.CH.661

'Uranopyrochlore' (Var.v. Pyrochlore supergroup)

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

kubisch : m3m : Fd3m

4.CH.911

'Strontiopyrochlore' (Var.v. Pyrochlore group)

Sr0.6Nb2(O,OH)7

kubisch : m3m : Fd3m

4.CH.912

'Ceriopyrochlore-(Ce)' (Var.v. Pyrochlore supergroup)

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

kubisch : m3m : Fd3m

4.CH.913

'Bismutopyrochlore' (Var.v. Pyrochlore supergroup)

(Bi,U,Ca,Pb)1+x(Nb,Ta)2O6(OH)·nH2O

kubisch : m3m : Fd3m

4.CH.914

Fluorkenopyrochlore

(☐,Na,Ce,Ca)2(Nb,Ti)2O6F

4.CH.920

Hydropyrochlore

(H2O,☐)2Nb2(O,OH)6(H2O)

kubisch : m3m : Fd3m

4.CH.961

'Bariopyrochlore' (Var.v. Pyrochlore supergroup)

(Ba,Sr)(Nb,Ti)2(O,OH)7

kubisch : m3m : Fd3m

4.CH.962

Varieties

Plumbopyrochlore

Stibiobetafite

Strontiopyrochlore

Yttropyrochlore-(Y)

Alternative Name

Azor-Phyrrit

Azor-Phyrrite

Azor-pyrrhit

Azor-pyrrhite

Azorpyrrhite

English

Ceruranopyrochlore

German

Chalcolamprit

Spanish

Chalcolamprita

English

Chalcolamprite

English

Columbomicrite

Columbomicrolit

Columbomicrolita

Columbomicrolite

Columbomicrolite (of De Villiers)

Columbomikrolith

Endeiolite

Fluochlor

English

Fluochlore

Hydrochlor

Koppit

Koppita

Koppite

Niobpyrochlor

French

Pyrochlore groupe

English

Pyrochlorite

German

Pyrrhit

English

Pyrrhite

Thorian Pyrochlore

Zirconian Pyrochlore

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

German pages

DeWikiPedia - search for: Pyrochlor-Gruppe
Google-Bilder-Suche - search for: Pyrochlor-Gruppe
Mineralogisch-Petrographisches-Institut Hamburg - search for: Pyrochlor-Gruppe

English pages

Mindat - search for: Pyrochlore group
Webmineral - search for:Pyrochlore group
Handbook-of-Mineralogy - search for: Pyrochlore group
RRUFF - Raman, XRD and other mineral data - search for: Pyrochlore group
RRUFF - References and PDF downloads - search for: Pyrochlore group
American-Mineralogist-Crystal-Structure-Database - search for: Pyrochlore group
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German pages

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