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Hydroxycalciopyrochlore

Pictures (2 Images total)

Hydroxycalciopyrochlore, Niobophyllite, Monazite-(Ce)
Views (Image: 1476780931): 895
Hydroxycalciopyrochlore, Niobophyllite, Monazite-(Ce)

SEM image of Nyobophyllite particle from from hand-picked concentrate of Ernst Nickel's part of holotype specimen. Note abundant inclusions of medium-bright in BSE octahedral crystals of Hydroxycal...

Copyright: Pavel M. Kartashov
Contribution: Stefan 2016-10-18
Locality: Mann 2 (Ten Mile Lake) / Seal Lake / Labrador / Neufundland und Labrador / Kanada
Hydroxycalciopyrochlore, Fluorbritholite-(Ce)
Views (Image: 1476780892): 1672
Hydroxycalciopyrochlore, Fluorbritholite-(Ce)

Hydroxycalciopyrochlore and Fluorbritholite-(Ce) on Sanidine, Locality: In den Dellen quarries, Niedermendig, Mendig, Laach lake volcanic complex, Eifel, Rhineland-Palatinate, Germany;

Collection: christof schäfer
Copyright: Mabu
Contribution: Stefan 2016-10-18
Locality: In den Dellen (Grube Zieglowski) / Mendig, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland

Collectors Summary

Color braun-schwarz, grün-schwarz und frisch schwarz
Streak color braun
Lustre Fettglanz
Hardness (Mohs) 5 - 6
Cleavages metamict, keine erkennbare Spaltbarkeit und Teilbarkeit
Fracture muschelig
Solubility löslich in H3PO4; nicht löslich in HCl und HNO3
Crystal System kubisch, Fd3m
Morphology Kristalle kommen meistens als Oktaeder und weniger häufig als Dodekaeder und Tetrahexaeder oder Kombinationen davon vor. Einige Kristalle zeigen eine allotriomorphen Gestalt mit einer dicken dreieckigen tabellarischen Form. Kristalle liegen im allgemeinen im Bereich von 0,1 bis 1 mm.

Chemism

Chem­ical formula

(Ca,Na,U,☐)2(Nb,Ti)2O6(OH)

Empir­ical formula (anal­y­sis)

(Ca0.74Na0.58U0.40Ce0.05Fe0.020.21)Σ2.00(Nb1.15Ti0.80Ta0.03Al0.01Mg0.01)Σ2.00O6.02[(OH)1.01F0.09]Σ1.10

Chem­ical com­po­si­tion

Calcium, Natrium, Niob, Titan, Sauerstoff, Uran, Wasserstoff, Vakanz

Unit weight: 412.6075551626 u; Number of atoms in the formula: 12.13

Info

Empirical formula:

(Ca0.74Na0.58U0.40Ce0.05Fe0.02Vc0.21)(Nb1.15Ti0.80Ta0.03Al0.01Mg0.01)O6.02[(OH)1.01F0.09]

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

0.21

1.73

0.0000000

0.0000000

Hydrogen

H

0.25

1.01

8.33

1.0079470

1.0180265

Oxygen

O

27.26

7.03

57.96

15.9994300

112.4759929

Fluorine

F

0.41

0.09

0.74

18.9984033

1.7098563

Sodium

Na

3.23

0.58

4.78

22.9897702

13.3340667

Magnesium

Mg

0.06

0.01

0.08

24.3050600

0.2430506

Aluminium

Al

0.07

0.01

0.08

26.9815382

0.2698154

Calcium

Ca

7.19

0.74

6.10

40.0784000

29.6580160

Titanium

Ti

9.28

0.8

6.60

47.8671000

38.2936800

Iron

Fe

0.27

0.02

0.16

55.8452000

1.1169040

Niobium

Nb

25.89

1.15

9.48

92.9063820

106.8423393

Cerium

Ce

1.70

0.05

0.41

140.1161000

7.0058050

Tantalum

Ta

1.32

0.03

0.25

180.9479100

5.4284373

Uranium

U

23.08

0.4

3.30

238.0289130

95.2115652

Anal­y­sis wt%

Nb2O5 : 36.36,
Ta2O5 : 1.78,
TiO2 : 15.23,
Al2O3 : 0.15,
Ce2O3 : 2.02,
Y2O3 : 0.13,
UO2 : 25.87,
ThO2 : 0.26,
PbO : 0.11,
CaO : 9.89,
FeO : 0.42,
MgO : 0.08,
Na2O : 4.25,
F : 0.38,
H2O : 2.15,
–O=F2 : 0.16,
Total : 98.92

Elektronenstrahlmikroanalyse, durchschnittlich 10 Punkte, Gew .-%, Wassermenge durch Stöchiometrie; Empirische Formel berechnet auf der Grundlage von 2 Atomen von B pfu

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.12-020

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.110

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

IMA sta­tus

anerkannt - CNMNC - New minerals and nomenclature modifications approved in Jun. 2011

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Pyrochlore supergroup  ⇒ Pyrochlore group

Optical Properties

Color

braun-schwarz, grün-schwarz und frisch schwarz

Streak color

braun

Diaphane­ity (Trans­parency)

durchscheinend

Lus­tre

Fettglanz

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell param­e­ters a (Å)

10.381

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)

1118.71

Kristall struc­ture

Struktur bestimmt

X-Ray Pow­der Diffrac­tion

2.966(100), 2.569(18), 1.814(34), 1.546(21), 1.480(5), 1.282(5), 1.178(5), 1.148(4)

XRD chart Hydroxycalciopyrochlore

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

Morphol­ogy

Kristalle kommen meistens als Oktaeder und weniger häufig als Dodekaeder und Tetrahexaeder oder Kombinationen davon vor. Einige Kristalle zeigen eine allotriomorphen Gestalt mit einer dicken dreieckigen tabellarischen Form. Kristalle liegen im allgemeinen im Bereich von 0,1 bis 1 mm.

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5 - 6

VHN (Hard­ness Vick­ers)

572 kg/mm2

Density (g/cm³)

5.10(3) (gemessen hydrostatisch) 5.15 (berechnet)

4.899 ( ρ calc. Mineralienatlas )

Cleav­ages

metamict, keine erkennbare Spaltbarkeit und Teilbarkeit

Frac­ture

muschelig

Radioac­tiv­ity

radioaktiv da Uran-haltig

Insta­bil­ity

löslich in H3PO4; nicht löslich in HCl und HNO3

(Co-)Type locality

(Co-)Type locality

China/Sichuan, Provinz/Liangshan, Präfektur/Mianning, Kreis/Maoniuping SE-Lagerstätte

Type mate­r­ial

China University of Geosciences, Beijng, China

Col­lec­tion number of type mate­r­ial

M595-22

Par­a­ge­n­e­sis of type mate­r­ial

Calcit, Baryt, Celestine, Albit, Aegirin, Aegirin-Augit, Fluorit, Parisit-(Ce), Thorit, Thorianit, Zirkon, Galenit, Sphalerit, Magnetit, Pyrit

Preface

Author (Name, Year)

Yang Guangming, Li Guowu, Xiong Ming, Pan Baoming and Yan Chenjie (2011)

References

Yang, G., Li, G., Xiong, M., Pan, B. and Yan, C. (2011) Hydroxycalciopyrochlore, IMA 2011-026. CNMNC Newsletter No. 10, October 2011, page 2554;

Yang G., Li G., Xiong M., Pan B., Yan C. - Hydroxycalciopyrochlore, A New Mineral Species from Sichuan, China. Acta Geologica Sinica, 88 (2014), 748-753.

Drábek;, M., Frýda J., Šarbach M., Skála, R. - Hydroxycalciopyrochlore from a regionally metamorphic marble at Bližná, Southwestern Czech Republic. Neues Jahrbuch für Mineralogie - Abhandlungen: Journal of Mineralogy and Geochemistry, 193 (2016), (in press).

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

CNMNC (IMA)-Number

IMA 2011-026

CNMNC symbol

Symbol

Hcpcl

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