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Sosedkoite (Sosedkoit)

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Sosedkoite
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Sosedkoite
weiße, strahlige Partie von Sosedkoite neben gelben Thoreaulith, Ognevka Ta Lagerstätte, Kalba Gebirge, Ostkasachstan, Kasachstan; BB ~ 2 mm
Copyright: Joy Desor; Contribution: openpit
Location: Kasachstan/Schyghys Qasaqstan oblysy (Ostkasachstan)/Belogorski/Kalba/Ognevka
Mineral: Sosedkoite
Image: 1583578142
License: Usage for Mineralienatlas project only
Sosedkoite

weiße, strahlige Partie von Sosedkoite neben gelben Thoreaulith, Ognevka Ta Lagerstätte, Kalba Gebirge, Ostkasachstan, Kasachstan; BB 2 mm

Copyright: Joy Desor
Contribution: openpit 2020-03-07
Locality: Ognevka / Kalba / Belogorski / Schyghys Qasaqstan oblysy (Ostkasachstan) / Kasachstan

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 6
Crystal System orthorhombisch, Cmmm

Chemism

Chemical formula

(K,Na)5Al2(Ta,Nb)22O60

Chemical composition

Aluminium, Natrium, Niob, Tantal, Kalium, Sauerstoff

Unit weight: 4685.91036765 u; Number of atoms in the formula: 89

Info

Empirical formula:

(K0.75Na0.25)5Al2(Ta0.75Nb0.25)22O60

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

20.49

60

67.42

15.9994300

959.9658000

Sodium

Na

0.61

1.25

1.40

22.9897702

28.7372128

Aluminium

Al

1.15

2

2.25

26.9815382

53.9630764

Potassium

K

3.13

3.75

4.21

39.0983100

146.6186625

Niobium

Nb

10.90

5.5

6.18

92.9063820

510.9851010

Tantalum

Ta

63.72

16.5

18.54

180.9479100

2,985.6405150

Analysis wt%

Ta2O5 : 91.25, Nb2O5 : 2.71, Sb2O3 : 0.47, Al2O3 : 1.96, Na2O : 1.15, K2O : 2.79 (Ref: Doklady Akademiia Nauk, SSSR 82)

Strunz 9th edition incl. updates

4.DM.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
M: Mit großen (± mittelgroßen) [Kationen]; unklassifiziert
05:Rankamait-Gruppe

Lapis Classification

IV/D.27-050

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

Classification by Hölzel

4.DK.330

4: OXIDES
D: Dioxides
K: Other Niobates, Tantalates
3: Natrotantite-Group

Dana 8th edition

08.07.06.02

08: Multiple Oxides with Nb, Ta, and Ti
07: Multiple Oxides with Nb, Ta, and Ti

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

max. Birefringence

schwach

2V angle

Biaxial

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

65

Space Group

Cmmm

Cell parameters a (Å)

17.25

Cell parameters b (Å)

17.73

Cell parameters c (Å)

3.95

Cell parameters a/b or c/a

0.973

Cell parameters c/b

0.223

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

1

Volume (ų)

1208.078

X-Ray Powder Diffraction

6.1(50),
3.95(100),
3.47(50),
3.03(90),
2.79(50),
2.376(50),
2.280(40),
1.974(60)

XRD chart Sosedkoite

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

Physical Properties

Hardness (Mohs)

6

VHN (Hardness Vickers)

830 (20g)

Density (g/cm³)

6.90 (berechnet)

6.441 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Voloshin & Mel`nikov & Pakhomovskiy, 1982

References

Transactions (Doklady) of the USSR Academy of Sciences, Earth Science Sections 264 (1982), 133

Other languages

German

Sosedkoit

French

Sosedkoite

English

Sosedkoite

Spanish

Sosedkoíta

Russian

Соседкоит

CNMNC (IMA)-Number

IMA 1981-014

CNMNC symbol

Symbol

Sos

Locations with GPS information

IDs

GUSID (Global unique identifier short form) kolMfya0oEashzXxNB6lbQ
GUID (Global unique identifier) 7F4C8992-B426-46A0-AC87-35F1341EA56D
Database ID 3577