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Natrobistantite

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Natrobistantit-Kuboktaeder
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Natrobistantit-Kuboktaeder
Kristallgröße: 0,8 mm; Fundort: Koktokay-Pegmatit, Koktokay, Altay, Ili, Xinjiang, China
Copyright: Pavel M. Kartashov; Contribution: slugslayer
Location: China/Xinjiang, Provinz/Ili (Yili Hasake), autonome Präfektur/Altay, Bezirk/Koktokay (Fuyun), Kreis/Koktokay Pegmatitfeld
Mineral: Natrobistantite
Image: 1244833295
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Natrobistantit-Kuboktaeder

Kristallgröße: 0,8 mm; Fundort: Koktokay-Pegmatit, Koktokay, Altay, Ili, Xinjiang, China

Copyright: Pavel M. Kartashov
Contribution: slugslayer 2009-06-12
Locality: Koktokay Pegmatitfeld / Koktokay (Fuyun), Kreis / Altay, Bezirk / Ili (Yili Hasake), autonome Präfektur / Xinjiang, Provinz / China

Collectors Summary

Color blau grün, farblos, grün, gelbgrün
Streak color weiß
Cleavages fehlt
Crystal System kubisch,

Chemism

Chemical formula

(Na,Cs)Bi(Ta,Nb,Sb)4O12

Chemical composition

Antimon, Bismut, Cäsium, Natrium, Niob, Tantal, Sauerstoff

Unit weight: 1045.90891505 u; Number of atoms in the formula: 18

Info

Empirical formula:

(Na0.75Cs0.25)Bi(Ta0.6Nb0.3Sb0.1)4O12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

18.36

12

66.67

15.9994300

191.9931600

Sodium

Na

1.65

0.75

4.17

22.9897702

17.2423277

Niobium

Nb

10.66

1.2

6.67

92.9063820

111.4876584

Antimony

Sb

4.66

0.4

2.22

121.7601000

48.7040400

Caesium

Cs

3.18

0.25

1.39

132.9054520

33.2263630

Tantalum

Ta

41.52

2.4

13.33

180.9479100

434.2749840

Bismuth

Bi

19.98

1

5.56

208.9803820

208.9803820

Analysis wt%

Na2O : 1.98, Cs2O : 3.90, CaO : 0.65, Bi2O3 : 22.97, Ta2O5 : 56.38, Nb2O5 : 11.00, Sb2O5 : 2.13 (Ref: Mineralogicheskii Zhurnal 83)

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.CI.981

4: OXIDES
C: R2O3 Sesquioxides
I: Microlite-Group, Ta-dominant on the B-site

Dana 8th edition

08.02.04.02

08: Multiple Oxides with Nb, Ta, and Ti
02: Multiple Oxides with Nb, Ta, and Ti where (A)2 (B2O6) (O,OH,F)
04: Pyrochlore Group (Cesstibtantite Subgroup; (Na,Cs)(Bi,Sb)(Ta,Nb)4O12

IMA status

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

Mineral status

Varietät

Variety / polytype of

Microlite group

Optical Properties

Color

blau grün, farblos, grün, gelbgrün

Streak color

weiß

Diaphaneity (Transparency)

transparent

RI value α / ω / n

2.00

Ri mean

2.00

2V angle

Isotropisch

Optical Data Luminescence

Luminescence

fluoreszierend, Kurzwelliges UV=stark rot orange

Color LW-UV (365nm)

 

orangerot

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

kubisch

Cell parameters a (Å)

10.502

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

4

Volumne (ų)

1158.287

X-Ray Powder Diffraction

6.07(60),
3.17(50),
3.03(100),
2.628(80),
1.858(90),
1.584(90),
1.205(50),
1.174(50)

XRD chart Natrobistantite

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

Crystals 3D

Open larger view

Physical Properties

Density (g/cm³)

6.1 - 6.2 / Durchschnittlich = 6.15

5.997 ( ρ calc. Mineralienatlas )

Cleavages

fehlt

Preface

Author (Name, Year)

Voloshin & Pakhomovskiy & Stepanov & Tyusheva, 1983

Other languages

German

Natrobistantit

Spanish

Natrobistantita

English

Natrobistantite

French

Natrobistantite

Russian

Натровистантит

CNMNC (IMA)-Number

IMA 1982-016