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Oxycalciopyrochlore

Collectors Summary

Hardness (Mohs) 4

Chemism

Chem­ical formula

Ca2Nb2O6O

Chem­ical com­po­si­tion

Calcium, Niob, Sauerstoff

Unit weight: 377.965574 u; Number of atoms in the formula: 11

Info

Empirical formula:

Ca2Nb2O6O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

29.63

7

63.64

15.9994300

111.9960100

Calcium

Ca

21.21

2

18.18

40.0784000

80.1568000

Niobium

Nb

49.16

2

18.18

92.9063820

185.8127640

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

Lapis Clas­sifica­tion

IV/C.12-024

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und ver-wandte Verbindungen)
12: Pyrochlor-Gruppe; PYROCHLOR-Untergruppe [Nb ± Ta]

Clas­sifica­tion by Hölzel

4.CH.140

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

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Pyrochlore supergroup  ⇒ Pyrochlore group

Optical Properties

2V angle

Isotropisch

Crystallography

Cell param­e­ters a (Å)

10.298

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

-

Cell param­e­ters a/b or c/a

1.000

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

8

Volumne (ų)

1092.1

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4

VHN (Hard­ness Vick­ers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.1 (berechnet)

4.597 ( ρ calc. Mineralienatlas )

IMA group assignments

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

'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

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

Fluornatropyrochlore

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

kubisch : m3m : Fd3m

IV/C.12-012

Oxynatropyrochlore

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

IV/C.12-014

Hydroxycalciopyrochlore

(Ca,Na,U,☐)2(Nb,Ti)2O6(OH)

kubisch : m3m : Fd3m

IV/C.12-020

Fluorcalciopyrochlore

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

kubisch : m3m : Fd3m

IV/C.12-022

Oxycalciopyrochlore

Ca2Nb2O6O

IV/C.12-024

Fluorstrontiopyrochlore

(Sr,☐)2Nb2(O,OH)6F

IV/C.12-042

Oxyplumbopyrochlore

Pb2Nb2O6O

IV/C.12-054

Kenoplumbopyrochlore

(Pb,☐)Nb2 O6(☐,O)

IV/C.12-058

Oxyyttropyrochlore-(Y)

(Y,☐) 2Nb2O6O

IV/C.12-074

Hydropyrochlore

(H2O,☐)2Nb2(O,OH)6(H2O)

kubisch : m3m : Fd3m

IV/C.12-096

Hydroxykenopyrochlore

(☐,Ce,Ba)2(Nb,Ti)2O6(OH,F)

kubisch : m3m : Fd3m

IV/C.12-100

Fluorkenopyrochlore

(☐,Na,Ce,Ca)2(Nb,Ti)2O6F

IV/C.12-102

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

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

Varieties

Titan-uranoan Oxycalciopyrochlore

titan- und uranhaltiger Oxycalciopyrochlor (UO2 bis 24,7 mas.% und ThO2 3,2 mas.%)

CNMNC symbol

Symbol

Ocpcl

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