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Hydroxykenopyrochlore (Hydroxykenopyrochlor)

Collectors Summary

Color zitronengelb, gelb
Hardness (Mohs) 4,5
Crystal System kubisch, Fd3m

Chemism

Chemical formula

(☐,Ce,Ba)2(Nb,Ti)2O6(OH,F)

Chemical composition

Barium, Cerium, Niob, Titan, Fluor, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 388.3300365745 u; Number of atoms in the formula: 11.75

Info

Empirical formula:

(Vc0.6Ce0.3Ba0.1)2(Nb0.75Ti0.25)2O6((OH)0.75F0.25)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

1.2

10.21

0.0000000

0.0000000

Hydrogen

H

0.19

0.75

6.38

1.0079470

0.7559603

Oxygen

O

27.81

6.75

57.45

15.9994300

107.9961525

Fluorine

F

1.22

0.25

2.13

18.9984033

4.7496008

Titanium

Ti

6.16

0.5

4.26

47.8671000

23.9335500

Niobium

Nb

35.89

1.5

12.77

92.9063820

139.3595730

Barium

Ba

7.07

0.2

1.70

137.3277000

27.4655400

Cerium

Ce

21.65

0.6

5.11

140.1161000

84.0696600

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.12-100

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

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Pyrochlore supergroup  ⇒ Pyrochlore group

Optical Properties

Color

zitronengelb, gelb

Optical Data Luminescence

Luminescence

fehlt

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell parameters a (Å)

10.590(5)

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

2

Volume (ų)

1187.648

X-Ray Powder Diffraction

6.02(22),
3.15(14),
3.02(100),
2.61(29),
1.847(45),
1.576(32),
1.199(9),
1.168(8)

XRD chart Hydroxykenopyrochlore

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

Physical Properties

Hardness (Mohs)

4,5

Density (g/cm³)

4.36 ber.

1.086 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Brasilien/Südosten (Região Sudeste)/Minas Gerais/Triângulo Mineiro e Alto Paranaíba/Araxá-Komplex/Compania Brasileira de Metalurgia e Mineração (CBMM)

Type material

Das Typmaterial wird in den mineralogischen Sammlungen des National Museum of Nature and Science, Tsukuba, Japan, Registernummer NSM-MF16011 hinterlegt.

Paragenesis of type material

Hydrokenopyrochlor

Preface

Author (Name, Year)

Ritsuro Miyawaki; Koichi Momma; Satoshi Matsubara; Takashi Sano, Masako Shigeoka; Hiroyuki Horiuchi (2021)

References

Ritsuro Miyawaki; Koichi Momma; Satoshi Matsubara; Takashi Sano, Masako Shigeoka; Hiroyuki Horiuchi: Hydroxykenopyrochlore, (□,Ce,Ba)2(Nb,Ti)2O6(OH,F), a new member of the pyrochlore group from Araxá, Minas Gerais, Brazil. The Canadian Mineralogist Vol. 59, Nr. 3 (2021) S. 589-601.

IMA group assignments

Other languages

German

Hydroxykenopyrochlor

English

Hydroxykenopyrochlore

Russian

Гидроксикенопирохлор

CNMNC (IMA)-Number

IMA 2017-030a

CNMNC symbol

Symbol

Hykpcl

Locations with GPS information

IDs

GUSID (Global unique identifier short form) uo_Q5IIrgkGrU-zlEtq4qg
GUID (Global unique identifier) E4D08FBA-2B82-4182-AB53-ECE512DAB8AA
Database ID 7209