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Takovite

Big Photo

Lavrion District Mines, Lavrion (Laurion; Laurium) District, Attikí (Attica; Attika) Prefecture, Greece
© O. Dziallas

Show Takovite Photos (5)
Formula:
Ni
 
6
Al
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
System:TrigonalColour:Yellowish-green, ...
Hardness:2
Name:Named after its discovery locality, Takovo, Serbia.


Hydrotalcite Group

Classification of Takovite

IMA status:Approved
Strunz 8th edition ID:5/E.03-50
Nickel-Strunz 10th (pending) edition ID:5.DA.50

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations
Dana 8th edition ID:16b.6.3.2

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
6 : AmBn(XO3)pZqxH2O & with (m+n):p = 8:1
Hey's CIM Ref.:7.22.5

7 : Oxides and Hydroxides
22 : Oxides of Ni
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Type Occurrence of Takovite

Type Locality:Takovo, Serbia
Year of Discovery:1957

Physical Properties of Takovite

Diaphaneity (Transparency):Translucent
Colour:Yellowish-green, bluish-green
Hardness (Mohs):2

Crystallography of Takovite

Crystal System:Trigonal
Cell Parameters:a = 3.02Å, c = 22.59Å
Ratio:a:c = 1 : 7.48
Unit Cell Volume:V 178.43 ų (Calculated from Unit Cell)

Optical Data of Takovite

Type:Uniaxial (-)
RI values: nω = 1.601 - 1.602 nε = 1.600
Maximum Birefringence:δ = 0.001 - 0.002

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Takovite

Formula:
Ni
 
6
Al
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
Essential elements:Al, C, H, Ni, O
All elements listed in formula:Al, C, H, Ni, O

Relationship of Takovite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.DA.05Dypingite
Mg
 
5
[OH|(CO
 
3
)
 
2
]
 
2
 · 5H
 
2
O
5.DA.05Giorgiosite
Mg
 
5
[(CO
 
3
)
 
4
(OH)
 
2
] · 4H
 
2
O
5.DA.05Hydromagnesite
Mg
 
5
[(CO
 
3
)
 
4
(OH)
 
2
] · 4H
 
2
O
5.DA.05Widgiemoolthalite
Ni
 
5
[(CO
 
3
)
 
4
(OH)
 
2
] · 5H
 
2
O
5.DA.05UM1986-10-CO:ClHMgMnZn
Mg
 
5
(Zn,Mn)
 
3
(CO
 
3
)
 
2
(OH,Cl)
 
12
·H
 
2
O
5.DA.05UM1987-01-CO:HMgS
Mg
 
4
(CO
 
3
)
 
2
(OH)
 
2
·6H
 
2
O ?
5.DA.10Artinite
Mg
 
2
[(OH)
 
2
|CO
 
3
] · 3H
 
2
O
5.DA.10Indigirite
Mg
 
2
Al
 
2
[(CO
 
3
)
 
4
(OH)
 
2
] · 15H
 
2
O
5.DA.10Chlorartinite
[Mg
 
2
(CO
 
3
)(H
 
2
O)(OH)]Cl · H
 
2
O
5.DA.15Otwayite
Ni
 
2
CO
 
3
(OH)
 
2
·H
 
2
O
5.DA.15Zaratite
Ni
 
3
(CO
 
3
)(OH)
 
4
·4H
 
2
O
5.DA.20Kambaldaite
NaNi
 
4
(CO
 
3
)
 
3
(OH)
 
3
·3H
 
2
O
5.DA.25Callaghanite
Cu
 
2
Mg
 
2
[(OH)
 
6
|CO
 
3
] · 2H
 
2
O
5.DA.30Claraite
(Cu,Zn)
 
3
[(OH)
 
4
|CO
 
3
] · 4H
 
2
O
5.DA.35Hydroscarbroite
Al
 
14
(CO
 
3
)
 
3
(OH)
 
36
·nH
 
2
O
5.DA.35Scarbroite
Al
 
5
(OH)
 
13
CO
 
3
·5H
 
2
O
5.DA.40Caresite
Fe
2+
4
Al
 
2
[(OH)
 
12
|CO
 
3
] · 3H
 
2
O
5.DA.40Quintinite
Mg
 
4
Al
 
2
(OH)
 
12
CO
 
3
H
 
2
O
5.DA.40Charmarite
Mn
2+
4
Al
 
2
[(OH)
 
12
|CO
 
3
] · 3H
 
2
O
5.DA.45Barbertonite
Mg
 
6
(Cr,Al)
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.45Brugnatellite
Mg
 
6
Fe
3+
 
[(OH)
 
13
|CO
 
3
] · 4H
 
2
O
5.DA.45Chlormagaluminite
(Mg,Fe
2+
 
)
 
4
Al
 
2
[(OH)
 
12
|(Cl
 
2
,CO
 
3
)] · 2H
 
2
O
5.DA.45Manasseite
Mg
 
6
Al
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.45Sjögrenite
Mg
 
6
Fe
3+
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.45Zaccagnaite
Zn
 
4
Al
 
2
(CO
 
3
)(OH)
 
12
·3H
 
2
O
5.DA.50Comblainite
(Ni
 
x
,Co
 
1-x
)(OH)
 
2
(CO
 
3
)
 
(1-x)/2
·nH
 
2
O
5.DA.50Desautelsite
Mg
 
6
Mn
3+
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.50Hydrotalcite
Mg
 
6
Al
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.50Pyroaurite
Mg
 
6
Fe
3+
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.50Reevesite
Ni
 
6
Fe
3+
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.50Stichtite
Mg
 
6
Cr
 
2
[(OH)
 
16
|CO
 
3
] · 4H
 
2
O
5.DA.50UM1998-10-CO:CoHNi
Co
 
6
Fe
 
2
CO
 
3
(OH)
 
16
·4H
 
2
O ?
5.DA.55Coalingite
Mg
 
10
Fe
3+
2
[(OH)
 
24
|CO
 
3
] · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
7.22.1Bunsenite
NiO
7.22.3Theophrastite
Ni(OH)
 
2
7.22.4Jamborite
(Ni
2+
 
,Ni
3+
 
,Co,Fe)(OH)
 
2
(OH,S,H
 
2
O)
7.22.6Trevorite
Ni
2+
 
Fe
3+
2
O
 
4
7.22.7Nichromite
(Ni,Co,Fe)(Cr,Fe,Al)
 
2
O
 
4

Other Names for Takovite

Synonyms:
Eardleyite
Other Languages:
German:Eardleyit
Eardlyit
Takovit
Spanish:Eardleyita
Eardlyita
Takovita

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 Takovite

Reference List:Maksimovic Z. (1957), Zap. Vses. Mineral. Obshchestva, 99, 595.

American Mineralogist (1972): 57: 1559.

American Mineralogist (1977): 62: 458-464.

Zapisnici srp. Geol. Društva za 1955 god: 219-224.

Internet Links for Takovite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Takovite in the Natural History Museum (London) online catalogue
  • Takovite details from Handbook of Mineralogy (PDF)
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    Localities for Takovite

    Hide Locality List
    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.
    (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
    		E. H. Nickel, E.H. et al. (1977) Eardleyite as a product of the supergene alteration of nickel sulfides in Western Australia. American Mineralogist; June 1977; v. 62; no. 5-6; p. 449-457
        • Kalgoorlie-Boulder City
          • Goongarrie
    		Mineralogical Magazine 1977 41 : 37-41; Min Mag (1979) 43, 97-98
      • Widgiemooltha
    		No reference listed
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • St Blasien
          • Urberg
    		Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German)
    Greece
     
    • Sterea Hellas Department
      • Fthiótis Prefecture
        • Lokris
    		Acta Geol. Hung., 44(1), 81–93.
    Russia
     
    • Central Region
      • Moscow Oblast' (Moscovskaya Oblast')
    		Pavel M. Kartashov analytical data
    Serbia
     
    Zap.Srpskog.Geol. Drustva zo 1955 god. ; AM 62 (1977), 458
    USA
     
    • Utah
      • Utah Co.
        • Oquirrh Mts
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
    Mineral and/or Locality
    Google
     
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