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Tomichite

Pictures (1 Images total)

Tomichit
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1583167668
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Tomichit
schwarzer Tomichit neben Pyrit auf der Außenfläche eines Bohrkernes, Hemlo Gold-Lagerstätte, Marathon, Ontario, Kanada; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta); Contribution: openpit
Location: Kanada/Ontario/Thunder Bay District/Marathon/Hemlo-Gebiet/Hemlo Gold-Lagerstätte
Mineral: Tomichite
Image: 1583167668
License: Usage for Mineralienatlas project only
Tomichit

schwarzer Tomichit neben Pyrit auf der Außenfläche eines Bohrkernes, Hemlo Gold-Lagerstätte, Marathon, Ontario, Kanada; BB < 1 mm
Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-03-02
Locality: Hemlo Gold-Lagerstätte / Hemlo-Gebiet / Marathon / Thunder Bay District / Ontario / Kanada

Collectors Summary

Color schwarz
Streak color schwarz
Hardness (Mohs) 6
Crystal System monoklin, A2/m

Chemism

Chemical formula

AsTi3(V,Fe)4O13(OH)

Chemical composition

Arsen, Eisen, Titan, Sauerstoff, Vanadium, Wasserstoff

Unit weight: 652.192599 u; Number of atoms in the formula: 23

Info

Empirical formula:

AsTi3(V0.75Fe0.25)4O13(OH)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.15

1

4.35

1.0079470

1.0079470
Oxygen

O

34.34

14

60.87

15.9994300

223.9920200
Titanium

Ti

22.02

3

13.04

47.8671000

143.6013000
Vanadium

V

23.43

3

13.04

50.9415100

152.8245300
Iron

Fe

8.56

1

4.35

55.8452000

55.8452000
Arsenic

As

11.49

1

4.35

74.9216020

74.9216020

Analysis wt%

Ø V2O3 : 34.92, Fe2O3 : 11.39, TiO2 : 37.42, As2O3 : 11.67, Sb2O3 : 1.22, H2O : 1.36 (Ref: Mineralogical Magazine 79)

Strunz 9th edition incl. updates

4.JB.55

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
J: Antimonite, Bismuthite, Sulfite, Selenite, Tellurite
B: [Arsenite], [Antimonite], [Bismuthite]; mit zusätzlichen [Anionen], ohne H20
55:Derbylith-Gruppe

Lapis Classification

IV/C.23-020

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

Classification by Hölzel

4.CO.200

4: OXIDES
C: R2O3 Sesquioxides
O: Pseudopyrochlore-Group
2: Tomichite-Derbylite-Group

Dana 8th edition

46.02.03.01

46: Basic or Halogen-Containing Antimonites, Arsenites and Phosphites
02: Basic or Halogen-Containing Antimonites, Arsenites and Phosphites with miscellaneous formulae
03: Derbylite Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

schwarz

Streak color

schwarz

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

A2/m

Cell parameters a (Å)

7.119

Cell parameters b (Å)

14.176

Cell parameters c (Å)

4.992

Cell parameters a/b or c/a

0.502

Cell parameters c/b

0.352

Cell parameters α

90°

Cell parameters β

105.5

Cell parameters γ

90°

Z

2

Volume (ų)

485.465

X-Ray Powder Diffraction

4.944(20),
3.153(20),
3.092(40),
2.836(90),
2.663(100),
2.023(30),
1.712(30),
1.572(50)
XRD chart Tomichite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

6

VHN (Hardness Vickers)

800 (50g)

Density (g/cm³)

4.16 (gemessen)

4.461 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Australien/Western Australia/Goldfields-Esperance, Region/Kalgoorlie-Boulder City/Kalgoorlie konsolidierte Gold-Minen/Boulder Perseverance Mine

Preface

Name from

Benannt nach S.A. Tomich, Begleitender Geologe aus Perth, West Australien

Author (Name, Year)

Nickel & Grey, 1979

References

Mineralogical Magazine 43 (1979), 469

Other languages

German

Tomichit

Spanish

Tomichita

French

Tomichite

English

Tomichite

Russian

Томичит

Simplified Chinese

砷钛钒石

Japanese

ﾄﾐﾁｱｲﾄ

CNMNC (IMA)-Number

IMA 1978-074

CNMNC symbol

Symbol

Tom

Locations with GPS information

IDs

GUSID (Global unique identifier short form) esiNhtgQZUqf_9FA3hw3qw
GUID (Global unique identifier) 868DC87A-10D8-4A65-9FFF-D140DE1C37AB
Database ID 3876