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Zoltaiite

Collectors Summary

Color stahlgrau bis schwarz
Lustre nahezu Metallglanz bis Matt
Hardness (Mohs) 6 - 7
Cleavages keine
Fracture unregelmäßig
Crystal System trigonal, P3

Chemism

Chemical formula

BaV4+2V3+12Si2O27

Chemical composition

Barium, Silicium, Sauerstoff, Vanadium

Unit weight: 1338.66451 u; Number of atoms in the formula: 44

Info

Empirical formula:

BaV2V12Si2O27

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

32.27

27

61.36

15.9994300

431.9846100

Silicon

Si

4.20

2

4.55

28.0855300

56.1710600

Vanadium

V

53.28

14

31.82

50.9415100

713.1811400

Barium

Ba

10.26

1

2.27

137.3277000

137.3277000

Analysis wt%

SiO2 : 9.01, TiO2 : 7.59, V2O3 : 63.88, Fe2O3 : 2.85, Cr2O3 : 1.90, BaO : 11.67 (Ref: American Mineralogist 2005)

Strunz 9th edition incl. updates

9.AG.85

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
G: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in meist [6] und > [6] Koordination
85:Zoltaiite-Gruppe

Lapis Classification

IV/C.23-035

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)

Classification by Hölzel

9.AJ.150

9: SILICATES
A: Nesosilicates
J: Nesosilicates with other complex Anions
1: C small; Welinite-Group

Dana 8th edition

47.02.06.01

47: Vanadium Oxysalts
02: Vanadium Oxysalts (VmOn)

IMA status

anerkannt 2003

Mineral status

anerkanntes Mineral

Optical Properties

Color

stahlgrau bis schwarz

Change in color

schwache Bireflektion

Diaphaneity (Transparency)

opak

Lustre

nahezu Metallglanz bis Matt

Pleochroism

schwach

Anisotropism

schwach

Reflectivity: (Lambda nm) ↓, ↑, Ø

(470) 15.9, 16.8, 16.4
(546) 16.0, 17.3, 16.7
(589) 15.9, 17.4, 16.7
(650) 16.1, 17.7, 16.9

Reflection chart Zoltaiite

Reflectivity Ø

16.64

Crystallography

Crystal System

trigonal

Class (H-M)

3

Space Group number

147

Space Group

P3

Cell parameters a (Å)

7.601

Cell parameters b (Å)

-

Cell parameters c (Å)

9.219

Cell parameters a/b or c/a

1.213

Cell parameters c/b

-

Z

1

Volumne (ų)

461.271

X-Ray Powder Diffraction

9.22(53), 3.100(70), 2.785(100), 2.679(62), 2.402(48), 2.190(97), 1.934(75)

XRD chart Zoltaiite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6 - 7

VHN (Hardness Vickers)

960 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.83

4.819 ( ρ calc. Mineralienatlas )

Cleavages

keine

Fracture

unregelmäßig

Preface

Name from

Tibor Zoltai

Author (Name, Year)

Bartolomew & Mancini & Cahill & Harlow & Bernardt, 2005

References

American Mineralogist 90 (2005), 1655

Lapis Jg. 39, Nr 5, Mai 2014

Other languages

German

Zoltaiit

English

Zoltaiite

Russian

Золтаиит

CNMNC (IMA)-Number

IMA 2003-006

CNMNC symbol

Symbol

Zol

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