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Tomichite

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Formula:
(V,Fe)
 
4
Ti
 
3
AsO
 
13
(OH)
System:MonoclinicColour:Black
Hardness:6
Name:Named after S.A. Tomich, consulting geologist of Perth, Western Australia.
This page provides mineralogical data about Tomichite.

Classification of Tomichite

IMA status:Approved 1978
Strunz 8th edition ID:4/C.23-20
Nickel-Strunz 10th (pending) edition ID:4.JB.55

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
B : Arsenites, antimonites, bismuthites; with additional anions, without H2O
Dana 8th edition ID:46.2.3.1

46 : ANTIMONITES AND ARSENITES CONTAINING HYDROXYL OR HALOGEN
2 : Miscellaneous
Hey's CIM Ref.:23.22

23 : Arsenites
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Type Occurrence of Tomichite

Type Locality:Perseverance Mine (Boulder Perseverance Mine), Kalgoorlie, Kalgoorlie-Boulder City, Goldfields-Esperance region, Western Australia, Australia
Year of Discovery:1979

Physical Properties of Tomichite

Lustre:Metallic
Diaphaneity (Transparency):Opaque
Colour:Black
Streak:Black
Hardness (Mohs):6

Crystallography of Tomichite

Crystal System:Monoclinic
Cell Parameters:a = 7.1Å, b = 14.19Å, c = 4.99Å
β = 105.05°
Ratio:a:b:c = 0.5 : 1 : 0.352
Unit Cell Volume:V 485.49 ų (Calculated from Unit Cell)

Chemical Properties of Tomichite

Formula:
(V,Fe)
 
4
Ti
 
3
AsO
 
13
(OH)
Essential elements:As, H, O, Ti, V
All elements listed in formula:As, Fe, H, O, Ti, V

Relationship of Tomichite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JB.05Fetiasite
(Fe
3+
 
,Fe
2+
 
,Ti)
 
3
(As
 
2
O
 
5
)O
 
2
4.JB.10Manganarsite
Mn
 
3
(As
 
2
O
 
4
)(OH)
 
4
4.JB.15Magnussonite
Mn
 
10
As
 
6
O
 
18
(OH,Cl)
 
2
4.JB.15UM1984-09-AsO:ClHMn
Mn
 
10
As
 
6
O
 
18
(OH)Cl
4.JB.20Armangite
Mn
2+
26
(AsO
 
3
)
 
14
(HAsO
 
3
)
 
4
(CO
 
3
)
4.JB.25Nanlingite
NaMg
 
4
(AsO
 
3
)
 
2
F
 
4
4.JB.30Asbecasite
Ca
 
3
(Ti,Sn
4+
 
)Be
 
2
(AsO
 
3
)
 
6
(SiO
 
4
)
 
2
4.JB.35Stenhuggarite
CaFeSb(AsO
 
3
)
 
2
O
4.JB.40Trigonite
Pb
 
3
Mn
2+
 
(AsO
 
3
)
 
2
(HAsO
 
3
)
4.JB.45Finnemanite
Pb
 
5
(AsO
 
3
)
 
3
Cl
4.JB.50Gebhardite
Pb
 
8
(As
 
2
O
 
5
)
 
2
OCl
 
6
4.JB.55Derbylite
Fe
3+
4
Ti
 
3
Sb
3+
 
O
 
13
(OH)
4.JB.55Graeserite
(Fe
3+
 
,Ti)
 
4
Ti
 
3
AsO
 
13
(OH)
4.JB.60Hemloite
(Ti,V
3+
 
,Fe
3+
 
,Al)
 
12
(As
3+
 
,Sb
3+
 
)
 
2
O
 
23
(OH)
4.JB.65Freedite
Cu
+
 
Pb
 
8
(AsO
 
3
)
 
2
O
 
3
Cl
 
5
4.JB.70Georgiadèsite
Pb
 
4
(AsO
 
3
)Cl
 
4
(OH)
4.JB.75Ekatite
(Fe
3+
 
,Fe
2+
 
,Zn)
 
12
(AsO
 
3
)
 
6
(AsO
 
3
,HSiO
 
4
)
 
2
(OH)
 
6
Related Minerals - Hey's Index Grouping:

- +
23.2Nanlingite
NaMg
 
4
(AsO
 
3
)
 
2
F
 
4
23.3Leiteite
Zn(As
 
2
O
 
4
)
23.5Kuznetsovite
(Hg
+
2
)Hg
2+
 
(AsO
 
4
)Cl
23.6Paulmooreite
Pb
 
2
[As
 
2
O
 
5
]
23.7Ecdemite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
23.8Heliophyllite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
23.9Finnemanite
Pb
 
5
(AsO
 
3
)
 
3
Cl
23.10Gebhardite
Pb
 
8
(As
 
2
O
 
5
)
 
2
OCl
 
6
23.11Zimbabweite
(Na,K)
 
2
PbAs
 
4
(Ta,Nb,Ti)
 
4
O
 
18
23.13Rouseite
Pb
 
2
Mn
2+
 
[AsO
 
3
]
 
2
 · 2H
 
2
O
23.14Freedite
Cu
+
 
Pb
 
8
(AsO
 
3
)
 
2
O
 
3
Cl
 
5
23.15Manganarsite
Mn
 
3
(As
 
2
O
 
4
)(OH)
 
4
23.17Armangite
Mn
2+
26
(AsO
 
3
)
 
14
(HAsO
 
3
)
 
4
(CO
 
3
)
23.18Karibibite
Fe
 
2
As
 
4
O
 
9
23.19Schneiderhöhnite
Fe
2+
 
Fe
3+
3
[As
 
5
O
 
13
]
23.20Lazarenkoite
(Ca,Fe)FeAs
 
3
O
 
7
 · 3H
 
2
O
23.21Stenhuggarite
CaFeSb(AsO
 
3
)
 
2
O

Other Names for Tomichite

Synonyms:
IMA1978-074
Other Languages:
German:Tomichit
Russian:Томичит
Simplified Chinese:砷钛钒石
Spanish:Tomichita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Tomichite

Reference List:

- +
Mineralogical Magazine (1979): 43: 469-471.

American Mineralogist (1980): 65: 811.

American Mineralogist (1987): 72: 201-208.

Internet Links for Tomichite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Tomichite details from Handbook of Mineralogy (PDF)
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    • Localities for Tomichite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • Western Australia
      • Goldfields-Esperance region
        • Kalgoorlie-Boulder City
          • Kalgoorlie
    		MM 1980, 469
    Canada
     
    • Ontario
      • Thunder Bay District
        • Marathon
    		Mineralogical Magazine 1988 52 : 691-697
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    Updated Mineral Entry: BykovaiteFrom Van King, 17th Feb 2012 19:50:20