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Tantite (Tantit)

Collectors Summary

Color farblos
Streak color weiß
Hardness (Mohs) 7.5
Solubility +++ HF, - HCl, H2SO4
Crystal System triklin,

Chemism

Chemical formula

Ta2O5

Chemical composition

Tantal, Sauerstoff

Unit weight: 441.89297 u; Number of atoms in the formula: 7

Info

Empirical formula:

Ta2O5

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

18.10

5

71.43

15.9994300

79.9971500

Tantalum

Ta

81.90

2

28.57

180.9479100

361.8958200

Analysis wt%

Ta2O5 : 98.28, Nb2O5 : 1.36 (Ref: Mineralogicheskii Zhurnal 83)

Strunz 9th edition incl. updates

4.EA.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
E: Metall: Sauerstoff = < 1 :2
A:
05:Tantit-Gruppe

Lapis Classification

IV/E.01-010

IV: OXIDE
E: Oxide mit Verhältnis Metall : Sauerstoff < 1:2 (M2O5, MO3 u.a.)

Classification by Hölzel

4.EA.100

4: OXIDES
E: R2O5 RO3 and others
A: R2O5oxides

Dana 8th edition

04.06.06.01

04: Oxide Minerals
06: Simple Oxides not classified

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos

Streak color

weiß

RI value α / ω / n

2.29

Ri mean

2.29 Gl

2V angle

Biaxial

Crystallography

Crystal System

triklin

Cell parameters a (Å)

3.80

Cell parameters b (Å)

3.79

Cell parameters c (Å)

35.74

Cell parameters a/b or c/a

1.003

Cell parameters c/b

9.430

Cell parameters α

90.92

Cell parameters β

90.18

Cell parameters γ

90.0

Z

6

Volumne (ų)

514.659

X-Ray Powder Diffraction

3.98(30),
3.14(30),
3.01(100),
2.429(50),
1.844(90),
1.573(80),
1.360(40),
1.004(50)

XRD chart Tantite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

7.5

VHN (Hardness Vickers)

133 (20g)

Density (g/cm³)

8.45 (berechnet)

8.554 ( ρ calc. Mineralienatlas )

Instability

+++ HF, - HCl, H2SO4

Preface

Author (Name, Year)

Voloshin & Pakhomovskiy & Perlina, 1983

References

Mineralogicheskiy Zhurnal 5 (1983) (3), 90

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Tantite

Ta2O5

4.EA.05

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Tantite

Ta2O5

IV/E.01-010

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Tantite

Ta2O5

4.EA.100

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Shcherbinaite

V2O5

orthorhombisch : mmm : Pmmn

04.06.01.01

Navajoite

(V5+,Fe3+)10O24·12H2O

monoklin : 2/m : C2/m

04.06.02.01

Paramelaconite

Cu21+Cu22+O3

tetragonal : 4/mmm : I41/amd

04.06.04.01

Murdochite

PbCu6O8-x(Cl,Br)2x

kubisch : m3m : Fm3m

04.06.05.01

Tantite

Ta2O5

04.06.06.01

Nolanite

(V3+,Fe2+,Fe3+,Ti)10O14(OH)2

hexagonal : 6mm : P63mc

04.06.07.01

Rinmanite

(Zn,Mn2+)2Mg2Fe43+Sb25+O12(OH)2

hexagonal : 6mm : P63mc

04.06.07.02

Allendeite

Sc4Zr3O12

trigonal : 3 : R3

04.06.08

Other languages

German

Tantit

Spanish

Tantita

English

Tantite

French

Tantite

Russian

Тантит

IMA Number

IMA 1982-066

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

German pages

DeWikiPedia - search for: Tantit
Google-Bilder-Suche - search for: Tantit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Tantit

English pages

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

Russian pages

Webmineral.ru - search for: Тантит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Tantit
Crystal-Treasure.com - search for: Tantit
Bosse - search for: Tantit



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