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Takanelite

Big Photo

Marfa, Presidio Co., Texas, USA
© 2009, JGW

Formula:
(Mn,Ca)Mn
 
4
O
 
9
·H
 
2
O
System:HexagonalColour:Grey, black, gray-brown
Lustre:DullHardness:5
Name:Named after Katsutoshi Takane (1899-1945), Professor of Mineralogy, Tohoku University, Sendai, Japan.


Birnessite Group. Ranciéite-Takanelite Series.
The manganese analogue of Ranciéite.


Classification of Takanelite

IMA status:Approved 1970
Strunz 8th edition ID:4/D.12-20
Nickel-Strunz 10th (pending) edition ID:4.FL.40

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
Dana 8th edition ID:7.10.1.2

7 : MULTIPLE OXIDES
10 : AB4X9
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Type Occurrence of Takanelite

Type Locality:Nomura mine, Ehime prefecture, Shikoku Island, Japan
Year of Discovery:1971

Physical Properties of Takanelite

Lustre:Dull
Colour:Grey, black, gray-brown
Streak:Dark brown
Hardness (Mohs):5

Crystallography of Takanelite

Crystal System:Hexagonal
Cell Parameters:a = 8.68Å, c = 9Å
Ratio:a:c = 1 : 1.037
Unit Cell Volume:V 587.24 ų (Calculated from Unit Cell)

Chemical Properties of Takanelite

Formula:
(Mn,Ca)Mn
 
4
O
 
9
·H
 
2
O
Essential elements:H, Mn, O
All elements listed in formula:Ca, H, Mn, O

Relationship of Takanelite to other Species

Series:Forms a series with Ranciéite (see here)
Member of Group:
Birnessite Group:
Related Minerals - Nickel-Strunz Grouping):

- +
4.FL.05Woodallite
Mg
 
6
Cr
 
2
(OH)
 
16
Cl
 
2
·4H
 
2
O
4.FL.05Iowaite
Mg
 
4
Fe(OH)
 
8
OCl·4H
 
2
O
4.FL.05Jamborite
(Ni
2+
 
,Ni
3+
 
,Co,Fe)(OH)
 
2
(OH,S,H
 
2
O)
4.FL.05Meixnerite
Mg
 
6
Al
 
2
(OH)
 
18
·4H
 
2
O
4.FL.05Muskoxite
Mg
 
7
Fe
 
4
O
 
13
·10H
 
2
O
4.FL.05Fougèrite
(Fe
2+
 
,Mg)
 
6
Fe
3+
2
(OH)
 
18
 · 4H
 
2
O
4.FL.10Hydrocalumite
Ca
 
2
Al(OH)
 
7
·2H
 
2
O
4.FL.15Kuzelite
Ca
 
4
Al
 
2.4
(OH)
 
12.8
(SO
 
4
)·6H
 
2
O
4.FL.20Aurorite
(Mn
2+
 
,Ag,Ca)Mn
4+
3
O
 
7
 · 3H
 
2
O
4.FL.20Chalcophanite
(Zn,Fe,Mn)Mn
 
3
O
 
7
·3H
 
2
O
4.FL.20Ernienickelite
NiMn
 
3
O
 
7
·3H
 
2
O
4.FL.20Jianshuiite
(Mg,Mn)Mn
 
3
O
 
7
·3H
 
2
O
4.FL.25Woodruffite
Zn(Mn
4+
 
,Mn
3+
 
)
 
5
O
 
10
·3½H
 
2
O
4.FL.30Asbolane
(Ni,Co)
 
2-x
Mn
4+
 
(O,OH)
 
4
 · nH
 
2
O
4.FL.35Buserite
Na
 
4
Mn
 
14
O
 
27
 ·21H
 
2
O
4.FL.40Ranciéite
(Ca,Mn)Mn
 
4
O
 
9
·3H
 
2
O
4.FL.45Birnessite
(Na,Ca)
 
0.5
(Mn
4+
 
,Mn
3+
 
)
 
2
O
 
4
 · 1.5H
 
2
O
4.FL.55Cianciulliite
Mn(Mg,Mn)
 
2
Zn
 
2
(OH)
 
10
·2-4H
 
2
O
4.FL.60Jensenite
Cu
 
3
[TeO
 
6
] · 2H
 
2
O
4.FL.65Leisingite
Cu(Mg,Cu,Fe,Zn)
 
2
[TeO
 
6
] · 6H
 
2
O
4.FL.70Akdalaite
4Al
 
2
O
 
3
 · H
 
2
O
4.FL.75Cafetite
(Ca,Mg)(Fe,Al)
 
2
Ti
 
4
O
 
12
·4H
 
2
O
4.FL.80Mourite
UMo
 
5
O
 
12
(OH)
 
10
4.FL.85Deloryite
Cu
 
4
(UO
 
2
)(MoO
 
4
)
 
2
(OH)
 
6

Other Names for Takanelite

Other Languages:
German:Takanelit
Takanelith
Japanese:高根鉱
Spanish:Takanelita

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 Takanelite

Reference List:Journal of the Japanese Association Min. Petr. Econ. Geol. (1971), 65, 1-15.

American Mineralogist (1971): 56: 1487.

American Mineralogist (1991): 76: 1426-1430.

Internet Links for Takanelite

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  • Raman and XRD data at RRUFF project
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    Localities for Takanelite

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