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Pyrochlore group

Pictures (75 Images total)

Fluorit, Götzenit, Fluorcalciopyrochlor
Views (File:
1651524092
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Fluorit, Götzenit, Fluorcalciopyrochlor
Transparente Fluorit Kugel mit leicht gelblichen, lattigen Götzenit Kristallen und einem Fluorcalciopyrochlor Oktaeder in einem Hohlraum eines Sanidinit Auswürflings; Bildbreite 3,7mm; Fundort: Steinbr. In den Dellen, Mendig, RLP, DE; Analyse mit Raman und EDX (alle drei Minerale)
Copyright: guefz; Contribution: guefz
Collection: guefz
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Mendig, Verbandsgemeinde/In den Dellen (Grube Zieglowski)
Mineral: Fluorcalciopyrochlore, Fluorite, Götzenite
Image: 1651524092
License: Usage for Mineralienatlas project only
Fluorit, Götzenit, Fluorcalciopyrochlor  E
Analysed with energy dispersive X-ray spectroscopy EDX
R
Analysed with RAMAN spectroscopy

Transparente Fluorit Kugel mit leicht gelblichen, lattigen Götzenit Kristallen und einem Fluorcalciopyrochlor Oktaeder in einem Hohlraum eines Sanidinit Auswürflings; Bildbreite 3,7mm; Fundort: Ste...
Collection: guefz
Copyright: guefz
Contribution: guefz 2022-05-02
Locality: In den Dellen (Grube Zieglowski) / Mendig, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Zirkon, Fluorcalciopyrochlor
Views (File:
1655153365
): 455
Zirkon, Fluorcalciopyrochlor
Ein grünlicher Zirkon Kristall mit vielen kleinen Fluorcalciopyrochlor Kriställchen (Analyse mit Raman und EDX) in einem Hohlraum eines Sanidinit Auswürflings; Bildbreite 13mm; Fundort: Steinbr. In den Dellen, Mendig, RLP, DE
Copyright: guefz; Contribution: guefz
Collection: guefz
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Mendig, Verbandsgemeinde/In den Dellen (Grube Zieglowski)
Mineral: Fluorcalciopyrochlore, Zircon
Image: 1655153365
License: Usage for Mineralienatlas project only
Zirkon, Fluorcalciopyrochlor  E
Analysed with energy dispersive X-ray spectroscopy EDX
R
Analysed with RAMAN spectroscopy

Ein grünlicher Zirkon Kristall mit vielen kleinen Fluorcalciopyrochlor Kriställchen (Analyse mit Raman und EDX) in einem Hohlraum eines Sanidinit Auswürflings; Bildbreite 13mm; Fundort: Steinbr. In...
Collection: guefz
Copyright: guefz
Contribution: guefz 2022-06-13
Locality: In den Dellen (Grube Zieglowski) / Mendig, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Pyrochlor
Views (File:
1322733965
): 4972, Rating: 9.67
Pyrochlor
Bildbreite: 2,2 mm; Fundort: Serra de Agua de Pau, Sao Miguel, Insel, Azoren, Portugal
Copyright: Jean-Marc Johannet; Contribution: Hg
Location: Portugal/Azoren (Ilhas dos Açores), Autonome Region/Sao Miguel, Insel/Ribeira Grande, Kreis/Bimssteinbruch
Mineral: Pyrochlore group
Image: 1322733965
Rating: 9.67 (votes: 12)
License: Usage for Mineralienatlas project only
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: Bimssteinbruch / Ribeira Grande, Kreis / Sao Miguel, Insel / Azoren (Ilhas dos Açores), Autonome Region / Portugal
Pyrochlor mit Biotit
Views (File:
1303929080
): 3396
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
Location: Italien/Kampanien (Campania), Region/Metropolitanstadt Neapel/Somma-Vesuv-Komplex/Monte Somma
Mineral: Pyrochlore group
Image: 1303929080
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
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 / Metropolitanstadt Neapel / Kampanien (Campania), Region / Italien
Fluornatropyrochlor
Views (File:
1629738849
): 247
Fluornatropyrochlor
Fluornatropyrochlor, Pau Vulkan, Lagoa, Azoren, Portugal, BB: 1,44 mm
Copyright: Harald Biecker; Contribution: Harald Biecker
Collection: Harald Biecker
Location: Portugal/Azoren (Ilhas dos Açores), Autonome Region/Sao Miguel, Insel/Ribeira Grande, Kreis/Água de Pau Vulkan
Mineral: Fluornatropyrochlore
Image: 1629738849
Rating: 10 (votes: 1)
License: Usage for Mineralienatlas project only
Fluornatropyrochlor

Fluornatropyrochlor, Pau Vulkan, Lagoa, Azoren, Portugal, BB: 1,44 mm
Collection: Harald Biecker
Copyright: Harald Biecker
Contribution: Harald Biecker 2021-08-23
Locality: Água de Pau Vulkan / Ribeira Grande, Kreis / Sao Miguel, Insel / Azoren (Ilhas dos Açores), Autonome Region / Portugal

You find additional specimen at the Geolitho Museum

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)

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

4.2 - 6.4 / Durchschnittlich = 5.3

Cleavages

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

(Co-)Type locality

(Co-)Type locality

Norwegen/Vestfold, Provinz/Larvik, Kommune/Stavern (Fredriksvärn)

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.

Donald D. Hogarth: The pyrochlore group: remarks on nomenclature. Can Mineral Vol. 51, Nr. 5 (2013) S. 801.
Daniel Atencio: The pyrochlore supergroup: remarks on nomenclature — response. Can Mineral Vol. 51, Nr. 5 (2013) S. 803-804.

Author (Name, Year)

Wöhler, 1826

Additional Information

Pyrochlor ist das Primärerz zur Gewinnung von Niob.

References

American Mineralogist 62 (1977), 403

IMA group assignments

 
Pyrochlore supergroup
A2-mD2X6-wZ1-n
 
 

 
 
Betafite group
 
 
 

 
 
 
Oxycalciobetafite
Ca2(Ti,Nb)2O6O
 
 

 
 
 
Oxyuranobetafite
(U,Ca,◻)2 (Ti,Nb)2O6O
 
 

 
 
Elsmoréite group
 
 
 

 
 
 
Hydrokenoelsmoreite
WO3·0.5H2O
kubisch
Fd3m

 
 
 
Hydroplumboelsmoreite
(Pb,☐)2(W,Fe3+)2O6(H2O)
kubisch
Fd3m

 
 
 
Hydroxykenoelsmoreite
(☐,Pb)2(W,Fe3+,Al)2(O,OH)6(OH)
trigonal
R3

 
 
Fluornatrocoulsellite
CaNa3AlMg3F14
trigonal
R3m

 
 
Hydrokenoralstonite
NaxMgxAl2-x(F,OH)6·H2O
kubisch
Fd3m

 
 
Kenomicrolite
☐2Ta2[O4(OH)2]☐
kubisch
Fd3m

 
 
Microlite group
(Na,Ca)2Ta2O6(O,OH,F)
kubisch
Fd3m

 
 
 
Fluorcalciomicrolite
(Ca,Na)2Ta2(O,OH)6F
kubisch
Fd3m

 
 
 
Fluornatromicrolite
(Na,Ca,Bi)2(Ta,Nb)2O6F
kubisch
Fd3m

 
 
 
Hydrokenomicrolite
(◻,H2O)2Ta2(O,OH)6(H2O)
kubisch
Fd3m

 
 
 
Hydromicrolite
(H2O,◻)2Ta2(O,OH)6(H2O)
 
 

 
 
 
Hydroxycalciomicrolite
Ca1.5Ta2O6(OH)
kubisch
P4332

 
 
 
Hydroxykenomicrolite
(◻,Na,Sb3+)2Ta2O6(OH)
kubisch
Fd3m

 
 
 
Kenoplumbomicrolite
(Pb,◻)2Ta 2O6(◻,O,OH)
kubisch
Fd3m

 
 
 
Oxybismutomicrolite
(Bi1.33☐0.67)Σ2Ta2O6O
kubisch
Fd3m

 
 
 
Oxycalciomicrolite
Ca2Ta2O7
kubisch
Fd3m

 
 
 
Oxynatromicrolite
(Na,Ca,U)2(Ta,Nb)2O6(O,F)
kubisch
Fd3m

 
 
 
Oxystannomicrolite
Sn2Ta2O6O
kubisch
Fd3m

 
 
 
Oxystibiomicrolite
(Sb3+,Ca)2Ta2O6O
 
 

 
 
Oxyyttrobetafite-(Y)
Y2Ti2O6O
kubisch
Fd3m

 
 
Pyrochlore group
A2Nb2(O,OH)6Z
kubisch
Fd3m

 
 
 
Cesiokenopyrochlore
☐Nb2(O,OH)6Cs1−x {x ∼ 0.20}
kubisch
Fd3m

 
 
 
Fluorcalciopyrochlore
(Ca,Na)2(Nb,Ti)2O6F
kubisch
Fd3m

 
 
 
Fluorkenopyrochlore
(☐,Na,Ce,Ca)2(Nb,Ti)2O6F
 
 

 
 
 
Fluornatropyrochlore
(Na,Pb,Ca,REE,U)2Nb2O6F
kubisch
Fd3m

 
 
 
Fluorstrontiopyrochlore
(Sr,☐)2Nb2(O,OH)6F
 
 

 
 
 
Hydrokenopyrochlore
☐2Nb2O4(OH)2(H2O)
kubisch
Fd3m

 
 
 
Hydropyrochlore
(H2O,☐)2Nb2(O,OH)6(H2O)
kubisch
Fd3m

 
 
 
Hydroxycalciopyrochlore
(Ca,Na,U,☐)2(Nb,Ti)2O6(OH)
kubisch
Fd3m

 
 
 
Hydroxykenopyrochlore
(☐,Ce,Ba)2(Nb,Ti)2O6(OH,F)
kubisch
Fd3m

 
 
 
Hydroxymanganopyrochlore
(Mn,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH)
kubisch
Fd3m

 
 
 
Hydroxynatropyrochlore
(Na,Сa,Ce)2Nb2O6(OH)
kubisch
Fd3m

 
 
 
Hydroxyplumbopyrochlore
(Pb1.5☐0.5)Nb2O6(OH)
kubisch
Fd3m

 
 
 
Kenoplumbopyrochlore
(Pb,☐)Nb2 O6(☐,O)
 
 

 
 
 
Oxycalciopyrochlore
Ca2Nb2O6O
 
 

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

 
 
 
Oxyplumbopyrochlore
Pb2Nb2O6O
kubisch
Fd3m

 
 
 
Oxyyttropyrochlore-(Y)
(Y,☐) 2Nb2O6O
 
 

 
 
Roméite group
(Ca,Fe2+,Mn,Na)2(Sb,Ti)2O6(O,OH,F)
kubisch
Fd3m

 
 
 
Fluorcalcioroméite
(Ca,Na)2Sb5+2O6(F,OH)
kubisch
Fd3m

 
 
 
Fluornatroroméite
(Na,Ca)2Sb2(O,OH)6F
 
 

 
 
 
Hydroxycalcioroméite
(Ca,Sb3+)2(Sb5+,Ti4+)2O6(OH)
kubisch
Fd3m

 
 
 
Hydroxyferroroméite
(Fe2+1.5☐0.5)Sb5+2O6(OH)
kubisch
Fd3m

 
 
 
Oxycalcioroméite
Ca2Sb2O6O
kubisch
Fd3m

 
 
 
Oxyplumboroméite
Pb2Sb5+2O7
kubisch
Fd3m

 
 
 
Stibiconite ?
Sb3+Sb5+2O6(OH)
kubisch
Fd3m

Refresh list

Actuality: 12. Jun 2025 - 16:32:54

Varieties

Plumbopyrochlore

Stibiobetafite

Strontiopyrochlore

Yttropyrochlore-(Y)

Other languages

Spanish

Pirocloro

German

Pyrochlor-Gruppe

English

Pyrochlore group

Simplified Chinese

烧绿石族

Japanese

ﾊﾟｲﾛｸﾛｱ

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

Locations with GPS information

IDs

GUSID (Global unique identifier short form) eA5qaqyqakqvUu67hP32PQ
GUID (Global unique identifier) 6A6A0E78-AAAC-4A6A-AF52-EEBB84FDF63D
Database ID 3166