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Bariopyrochlore

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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 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

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

 DeWikiPedia - search for: Bariopyrochlor
Google-Bilder-Suche - search for: Bariopyrochlor
Mineralienatlas.de (Forum) - search for: Bariopyrochlor

English pages

 Mindat - search for: Bariopyrochlore
Webmineral - search for:Bariopyrochlore
Handbook-of-Mineralogy - search for: Bariopyrochlore
RRUFF - Raman, XRD and other mineral data - search for: Bariopyrochlore
RRUFF - References and PDF downloads - search for: Bariopyrochlore
American-Mineralogist-Crystal-Structure-Database - search for: Bariopyrochlore
Strahlen.org - search for: Bariopyrochlore

Russian pages

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Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Bariopyrochlor
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Locations with GPS information