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Takanelite

Collectors Summary

Color grauschwarz-met.
Streak color bräunlichschwarz
Hardness (Mohs) 4.50 - 5.00
Solubility ++ Säuren
Crystal System hexagonal,

Chemism

Chemical formula

(Mn2+,Ca)Mn4+4O9·H2O

Additional chem. information

(Mn2+,Ca)2x(Mn4+)1-xO2·0.7H2O

Chemical composition

Calcium, Mangan, Sauerstoff, Wasserstoff

Unit weight: 432.985531025 u; Number of atoms in the formula: 17

Info

Empirical formula:

(Mn0.75Ca0.25)Mn4O9·H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.47

2

11.76

1.0079470

2.0158940

Oxygen

O

36.95

10

58.82

15.9994300

159.9943000

Calcium

Ca

2.31

0.25

1.47

40.0784000

10.0196000

Manganese

Mn

60.27

4.75

27.94

54.9380499

260.9557370

Analysis wt%

MnO2 : 74.01, MnO : 10.42, MgO : 0.59, CaO : 3.64, H2O : 11.50 (Ref: American Mineralogist 91)

Strunz 9th edition incl. updates

4.FL.40

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
F: Hydroxide (ohne V oder U)
L: Hydroxide mit H2O ± (OH); Lagen kantenverknüpfter Oktaeder
40:Takanelith-Gruppe

Lapis Classification

IV/D.12-020

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)

Classification by Hölzel

4.DF.330

4: OXIDES
D: Dioxides
F: Ramsdellite-Group

Dana 8th edition

07.10.01.02

07: Multiple Oxides
10: Multiple Oxides

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

grauschwarz-met.

Streak color

bräunlichschwarz

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

hexagonal

Cell parameters a (Å)

2.830

Cell parameters b (Å)

-

Cell parameters c (Å)

7.240

Cell parameters a/b or c/a

2.558

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

0.25

Volume (ų)

50.216

X-Ray Powder Diffraction

7.57(100),
4.43(20),
3.765(20),
2.462(10),
2.349(20),
2.065(10),
1.754(10),
1.420(20)

XRD chart Takanelite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

4.50 - 5.00

VHN (Hardness Vickers)

480 (100g)

Density (g/cm³)

3.425 (gemessen)

3.579 ( ρ calc. Mineralienatlas )

Instability

++ Säuren

Preface

Author (Name, Year)

Nambu & Tanida, 1971

References

American Mineralogist 87 (2002), 580

Other languages

Spanish

Takanelita

English

Takanelite

French

Takanelite

German

Takanelith

Russian

Таканелит

Simplified Chinese

塔锰矿

Alternative Name

German

Takanelit

Japanese

高根鉱

CNMNC (IMA)-Number

1970-034

CNMNC symbol

Symbol

Tkn

Locations with GPS information

IDs

GUSID (Global unique identifier short form) VPOiBjDTBUatEmdeREIWRQ
GUID (Global unique identifier) 06A2F354-D330-4605-AD12-675E44421645
Database ID 3742