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Bariopyrochlore (Bariopyrochlor)

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Bariopyrochlor
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Bariopyrochlor
Bildbreite: 7 mm; Fundort: Kukisvumchorr, Khibiny, Kola, Murmansk, Russland
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: Russland/Nordwestrussland, Föderationskreis/Murmansk, Oblast/Kola-Halbinsel/Chibiny (Khibiny)/Kukisvumchorr
Mineral: Bariopyrochlore
Image: 1240130204
License: Usage for Mineralienatlas project only
Bariopyrochlor

Bildbreite: 7 mm; Fundort: Kukisvumchorr, Khibiny, Kola, Murmansk, Russland
Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-04-19
Locality: Kukisvumchorr / Chibiny (Khibiny) / Kola-Halbinsel / Murmansk, Oblast / Nordwestrussland, Föderationskreis / Russland

Collectors Summary

Color grün grau, gelb grau
Streak color weiß
Hardness (Mohs) 5.5
Cleavages undeutlich {111}
Fracture muschelig
Crystal System kubisch, Fd3m
Morphology kubisch

Chemism

Chemical formula

(Ba,Sr)(Nb,Ti)2(O,OH)7

Empirical formula (analysis)

Ba0.30Sr0.22Ca0.05Ce0.04Na0.03Fe0.02K0.01Th0.01(Nb1.83Ti0.17)O5.61(H2O)0.80

Chemical composition

Barium, Niob, Strontium, Titan, Sauerstoff, Wasserstoff

Unit weight: 354.926602866 u; Number of atoms in the formula: 10.69

Info

Empirical formula:

Ba0.30Sr0.22Ca0.05Ce0.04Na0.03Fe0.02K0.01Th0.01(Nb1.83Ti0.17)O5.61(H2O)0.80

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.45

1.6

14.97

1.0079470

1.6127152
Oxygen

O

28.90

6.41

59.96

15.9994300

102.5563463
Sodium

Na

0.19

0.03

0.28

22.9897702

0.6896931
Potassium

K

0.11

0.01

0.09

39.0983100

0.3909831
Calcium

Ca

0.56

0.05

0.47

40.0784000

2.0039200
Titanium

Ti

2.29

0.17

1.59

47.8671000

8.1374070
Iron

Fe

0.31

0.02

0.19

55.8452000

1.1169040
Strontium

Sr

5.43

0.22

2.06

87.6210000

19.2766200
Niobium

Nb

47.90

1.83

17.12

92.9063820

170.0186791
Barium

Ba

11.61

0.3

2.81

137.3277000

41.1983100
Cerium

Ce

1.58

0.04

0.37

140.1161000

5.6046440
Thorium

Th

0.65

0.01

0.09

232.0381100

2.3203811

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

Classification by Hölzel

4.CH.962

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

Hey's Chemical Index of Minerals

18.01.17

18: Niobates and Tantalates
01: Niobates and tantalates containing neither rare earths nor U

Dana 8th edition

08.02.01.03

08: Multiple Oxides with Nb, Ta, and Ti
02: Multiple Oxides with Nb, Ta, and Ti where (A)2 (B2O6) (O,OH,F)
01: Pyrochlore Group (Pyrochlore Subgroup; Nb>Ta;(Nb+Ta)>2(Ti)

IMA status

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

Mineral status

Varietät

Variety / polytype of

Pyrochlore supergroup

Optical Properties

Color

grün grau, gelb grau

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

RI value α / ω / n

2.85

Ri mean

2.85

2V angle

Isotropisch

Crystallography

Crystal System

kubisch

Class (H-M)

m3m

Space Group number

227

Space Group

Fd3m

Cell parameters a (Å)

10.562

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)

1178.253

X-Ray Powder Diffraction

6.09(80),
3.18(50),
3.044(100),
1.864(70),
1.590(70),
1.210(50),
1.180(50),
1.016(60)
XRD chart Bariopyrochlore

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

Morphology

kubisch

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.5

VHN (Hardness Vickers)

550 (100g)

Density (g/cm³)

4.1 (gemessen) 4.01 (berechnet)

4.001 ( ρ calc. Mineralienatlas )

Cleavages

undeutlich {111}

Fracture

muschelig

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Tansania/Mbeya, Region/Amboseli/Mbeya/Panda Hill

Preface

Author (Name, Year)

Jäger & Niggli & van der Veen, 1959

References

American Mineralogist 62 (1977), 403

Other languages

Spanish

Bariopirocloro

German

Bariopyrochlor

English

Bariopyrochlore

French

Bariopyrochlore

Russian

Бариопирохлор

Alternative Name

Pandait

Pandaita

Pandaite

Locations with GPS information