Taneyamalite Mineral Data

Taneyamalite Mineral Data +

General Taneyamalite Information

Chemical Formula:

(Na,Ca)(Mn++,Mg)12[(Si,Al)6O17]2(O,OH)10

Composition:

Molecular Weight = 1,697.49 gm

Sodium 1.22 % Na 1.64 % Na₂O

Calcium 0.24 % Ca 0.33 % CaO

Magnesium 1.58 % Mg 2.61 % MgO

Manganese 18.77 % Mn 24.24 % MnO

Aluminum 1.11 % Al 2.10 % Al₂O₃

Iron 15.79 % Fe 12.27 % FeO / 8.94 % Fe₂O₃

Silicon 19.03 % Si 40.71 % SiO₂

Hydrogen 0.80 % H 7.11 % H₂O

Oxygen 41.47 % O

______ ______

100.00 % 99.95 % = TOTAL OXIDE

Empirical Formula:

Na_0.9Ca_0.1Mn²⁺_5.8Fe²⁺_2.9Fe³⁺_1.9Mg_1.1Al_0.3Si_11.5Al_0.4O_30.6(OH)_13.4

Environment:

In cracks in ferruginous chert, mafic rocks and limestones subjected to blueschist facies metamorphism.

IMA Status:

Approved IMA 1981

Locality:

Taneyama mine, Kumamoto Prefecture and Iwaizama mine, Saitama Prefecture, Honshu, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Taneyamalite Image

Images:

Taneyamalite

Comments: Dark brown silky fibrous taneyamalite vein in manganese ore.
Location: Taneyama Mine, Toyo, Kumamoto, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Taneyamalite Crystallography

Axial Ratios:

a:b:c =1.0384:1:0.9658

Cell Dimensions:

a = 10.198, b = 9.82, c = 9.485, Z = 1; alpha = 90.5°, beta = 70.53°, gamma = 108.57° V = 848.89 Den(Calc)= 3.32

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

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

By Intensity(I/I_o): 3.273(1), 9.29(0.8), 4.62(0.5),

Physical Properties of Taneyamalite

Cleavage:

[010] Perfect, [100] Fair

Color:

Greenish yellow, Grayish yellow.

Density:

3.3

Diaphaniety:

Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Flakes - Flat, thin crystals or aggregates.

Hardness:

5-6 - Between Apatite and Orthoclase

Luster:

Vitreous (Glassy)

Streak:

light yellow

Optical Properties of Taneyamalite

Optical Data:

Biaxial (-), a=1.646-1.697, b=1.664-1.72, g=1.676-1.732, bire=0.0300-0.0350, 2V(Calc)=70-76, 2V(Meas)=70.

Pleochroism (x):

nearly colorless or pale golden yellow.

Pleochroism (y):

nearly colorless or yellowish brown.

Pleochroism (z):

pale yellow or dark brown.

Calculated Properties of Taneyamalite

Electron Density:

r_electron=3.25 gm/cc
note: r_Taneyamalite=3.32 gm/cc.

Fermion Index

Fermion Index = 0.01401
Boson Index = 0.98599

Photoelectric:

PE_Taneyamalite= 10.31 barns/electron
U=PE_Taneyamalite x r_electron= 33.49 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Taneyamalite is Not Radioactive

Taneyamalite Classification

Dana Class:

69.2.3.2 (69)Inosilicate Chains with Side Branches or Loops

(69.2)with P>2

(69.2.3)Howieite group

69.2.3.1 Howieite Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13 P1,P1 Tri

69.2.3.2 Taneyamalite (Na,Ca)(Mn,Mg)12[(Si,Al)6O17]2(O,OH)10 P1 1

69.2.3.3 Deerite (Fe,Mn)6(Fe,Al)3Si6O20(OH)5 P 2₁/a 2/m

Strunz Class:

VIII/F.16-30 VIII - Silicates

VIII/F - Inosilicates (chain and band) modified double chains

VIII/F.16 - Deerite - Taneyamalite series

VIII/F.16-10 Deerite (Fe,Mn)6(Fe,Al)3Si6O20(OH)5 P 2₁/a 2/m

VIII/F.16-20 Howieite Na(Fe,Mn)10(Fe,Al)2Si12O31(OH)13 P1,P1 Tri

VIII/F.16-30 Taneyamalite (Na,Ca)(Mn,Mg)12[(Si,Al)6O17]2(O,OH)10 P1 1

VIII/F.16-40 Johninnesite Na2Mg4Mn12(AsO4)2(Si12O35)(OH)6 P1 1

Other Taneyamalite Information

References:

NAME( Dana8) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)

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Taneyamalite

(Na,Ca)(Mn++,Mg)12[(Si,Al)6O17]2(O,OH)10
Dana No: 69.2.3.2 Strunz No: VIII/F.16-30
Locality:

Notes: