Takanelite Mineral Data

Takanelite Mineral Data +

General Takanelite Information

Chemical Formula:

(Mn++,Ca)Mn++++4O8·(H2O)

Composition:

Molecular Weight = 419.21 gm

Calcium 0.96 % Ca 1.34 % CaO

Manganese 64.21 % Mn 15.23 % MnO / 82.95 % MnO₂

Hydrogen 0.48 % H 4.30 % H₂O

Oxygen 34.35 % O

______ ______

100.00 % 103.82 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_0.9Ca_0.1Mn⁴⁺₄O₈·(H₂O)

Environment:

Oxidation zone of a braunite-rhodochrosite-Carpopilite deposit.

IMA Status:

Approved IMA 1971

Locality:

Nomura mine, Ehime, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Katsutoshi Takane (1899-1945), professor of mineralogy, Tohoku University, Sendai, Japan.

Synonym:

Wad

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Takanelite Crystallography

Axial Ratios:

a:c = 1:1.03686

Cell Dimensions:

a = 8.68, c = 9, Z = 3; V = 587.24 Den(Calc)= 3.56

Crystal System:

HexagonalSpace Group: Unk

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.25(1), 3.619(0.25), 2.451(0.2),

Physical Properties of Takanelite

Cleavage:

None

Color:

Brownish gray, Black, Steel gray.

Density:

3.41 - 3.425, Average = 3.41

Diaphaniety:

Opaque

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Sub Metallic

Streak:

brown black

Calculated Properties of Takanelite

Electron Density:

r_electron=3.37 gm/cc
note: r_Takanelite=3.56 gm/cc.

Fermion Index

Fermion Index = 0.00017
Boson Index = 0.99983

Photoelectric:

PE_Takanelite= 16.91 barns/electron
U=PE_Takanelite x r_electron= 57.02 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Takanelite is Not Radioactive

Takanelite Classification

Dana Class:

7.10.1.2 (7)Multiple Oxides

(7.10)Dana Type

(7.10.1)Dana Group

7.10.1.1 Rancieite (Ca,Mn)Mn4O9·3(H2O) Unk Hex

7.10.1.2 Takanelite (Mn,Ca)Mn4O8·(H2O) Unk Hex

Strunz Class:

IV/D.12-20 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.12 - Rancieite - Takanelite series

IV/D.12-10 Rancieite (Ca,Mn)Mn4O9·3(H2O) Unk Hex

IV/D.12-20 Takanelite (Mn,Ca)Mn4O8·(H2O) Unk Hex

Other Takanelite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8)

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Print or Cut-and-Paste your Takanelite Specimen Label here :

Takanelite

(Mn++,Ca)Mn++++4O8·(H2O)
Dana No: 7.10.1.2 Strunz No: IV/D.12-20
Locality:

Notes: