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Tomichite

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Tomichit
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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 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 ver-wandte 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

Volumne (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 )

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

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

Tomichite

AsTi3(V,Fe)4O13(OH)

monoklin : 2/m : A2/m

4.JB.55

Derbylite

(Fe3+,Fe2+,Ti)7Sb3+O13(OH)

monoklin : 2/m : P21/m

4.JB.55

Graeserite

Fe3+4Ti3As3+O13(OH)

monoklin : 2/m : A2/m

4.JB.55

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

Hemloite

(Ti,V3+,Fe3+,Al)12As3+2O23(OH)

triklin : 1 : P1

IV/C.23-010

Graeserite

Fe3+4Ti3As3+O13(OH)

monoklin : 2/m : A2/m

IV/C.23-015

Tomichite

AsTi3(V,Fe)4O13(OH)

monoklin : 2/m : A2/m

IV/C.23-020

Derbylite

(Fe3+,Fe2+,Ti)7Sb3+O13(OH)

monoklin : 2/m : P21/m

IV/C.23-030

Zoltaiite

BaV4+2V3+12Si2O27

trigonal : 3 : P3

IV/C.23-035

Greenwoodite

(Ba,V3+O)2V3+9(Fe3+,Fe2+)2Si2O22

trigonal : 3m : P3m1

IV/C.23-038

Batisivite

V8Ti6[Ba(Si2O)]O28

triklin : 1 : P1

IV/C.23-040

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

Tomichite

AsTi3(V,Fe)4O13(OH)

monoklin : 2/m : A2/m

4.CO.200

Graeserite

Fe3+4Ti3As3+O13(OH)

monoklin : 2/m : A2/m

4.CO.210

Derbylite

(Fe3+,Fe2+,Ti)7Sb3+O13(OH)

monoklin : 2/m : P21/m

4.CO.220

Hemloite

(Ti,V3+,Fe3+,Al)12As3+2O23(OH)

triklin : 1 : P1

4.CO.260

Batisivite

V8Ti6[Ba(Si2O)]O28

triklin : 1 : P1

4.CO.265

Zimbabweite

(Na,K)2PbAs43+(Ta,Nb,Ti)4O18

orthorhombisch : mmm : Ccmb

4.CO.280

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

Ecdemite

Pb6As23+O7Cl4

monoklin : 2 : P21

46.02.01.01

Tomichite

AsTi3(V,Fe)4O13(OH)

monoklin : 2/m : A2/m

46.02.03.01

Derbylite

(Fe3+,Fe2+,Ti)7Sb3+O13(OH)

monoklin : 2/m : P21/m

46.02.03.02

Graeserite

Fe3+4Ti3As3+O13(OH)

monoklin : 2/m : A2/m

46.02.03.03

Hemloite

(Ti,V3+,Fe3+,Al)12As3+2O23(OH)

triklin : 1 : P1

46.02.04.01

Gebhardite

Pb8(As23+O5)2OCl6

monoklin : 2/m : P21/c

46.02.05.01

Manganarsite

Mn32+As23+O4(OH)4

46.02.06.01

Armangite

Mn262+[CO3|(AsO2(OH))4|(AsO3)14]

trigonal : 3 : P3

46.02.07.01

Dixenite

Cu1+Mn142+Fe3+(As3+O3)5(SiO4)2(As5+O4)(OH)6

trigonal : 3 : R3

46.02.08.01

Arakiite

ZnMn2+12Fe3+2(As3+O3)(As5+O4)2(OH)23

monoklin : m : Cc

46.02.08.02

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

IMA Number

IMA 1978-074

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Томичит

Mineral Dealer

German pages

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

Locations with GPS information