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Hydroxycalciopyrochlore

Pictures (2 Images total)

Hydroxycalciopyrochlore, Niobophyllite, Monazite-(Ce)
Views (File:
1476780931
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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 Hydroxycalciopyrochlore. More rare brightmost irregular grains are Monazite-(Ce). Analytical data are available on daughter photos. Pavel M. Kartashov collection and photo; Locality: Mann 2, Seal Lake alkaline complex, Labrador, Newfoundland and Labrador, Canada;
Copyright: Pavel M. Kartashov; Contribution: Stefan
Location: Kanada/Neufundland und Labrador/Labrador/Seal Lake/Mann 2 (Ten Mile Lake)
Mineral: Hydroxycalciopyrochlore, Niobophyllite
Image: 1476780931
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
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 (File:
1476780892
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Hydroxycalciopyrochlore, Fluorbritholite-(Ce)
Hydroxycalciopyrochlore and Fluorbritholite-(Ce) on Sanidine, Locality: In den Dellen quarries, Niedermendig, Mendig, Laach lake volcanic complex, Eifel, Rhineland-Palatinate, Germany;
Copyright: Mabu; Contribution: Stefan
Collection: christof schäfer
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Mendig, Verbandsgemeinde/In den Dellen (Grube Zieglowski)
Mineral: Fluobritholite-(Ce), Fluorbritholite-(Ce), Hydroxycalciopyrochlore
Image: 1476780892
Rating: 8 (votes: 1)
License: Usage for Mineralienatlas project only
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)

(Ca0.74Na0.58U0.40Ce0.05Fe0.02☐0.21)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 verwandte 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

Volume (ų)

1118.71

Crystal 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

Other languages

German

Hydroxycalciopyrochlor

English

Hydroxycalciopyrochlore

Russian

Гидроксикальциопирохлор

CNMNC (IMA)-Number

IMA 2011-026

CNMNC symbol

Symbol

Hcpcl

Locations with GPS information

IDs

GUSID (Global unique identifier short form) ngqjQG761UGY6bzzb5LygA
GUID (Global unique identifier) 40A30A9E-FA6E-41D5-98E9-BCF36F92F280
Database ID 7073