Taikanite Mineral Data

General Taikanite Information

Chemical Formula:

(Ba,Sr)2Mn+++2Si4O12

Composition:

Molecular Weight = 664.01 gm

Barium 31.02 % Ba 34.64 % BaO

Strontium 6.60 % Sr 7.80 % SrO

Manganese 16.55 % Mn 23.78 % Mn₂O₃

Silicon 16.92 % Si 36.19 % SiO₂

Oxygen 28.91 % O

______ ______

100.00 % 102.41 % = TOTAL OXIDE

Empirical Formula:

Ba_1.5Sr_0.5Mn³⁺₂Si₄O₁₂

Environment:

In hydrothermal manganese ores related to alkalic dikes intruding limestones and siliceous rocks (Irnimi deposit, Russia); in a bedded manganese deposit (Wessels mine, South Africa) .

IMA Status:

Approved IMA 1985

Locality:

Irnimi manganese deposit, Taikan Mountains, Khabarovsk Territory, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Taikanite + Pronunciation

Synonym:

ICSD 39593

PDF 39-335

Taikanite Crystallography

Axial Ratios:

a:b:c =1.8816:1:0.6627

Cell Dimensions:

a = 14.6, b = 7.759, c = 5.142, Z = 2; beta = 93.25° V = 581.56 Den(Calc)= 3.79

Crystal System:

Monoclinic - Sphenoidal H-M Symbol (2) Space Group: C 2

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

By Intensity(I/I_o): 2.912(1), 2.832(0.9), 2.569(0.8),

Physical Properties of Taikanite

Cleavage:

{001} Perfect

Color:

Greenish black.

Density:

4.72

Diaphaneity:

Translucent to Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

6-7 - Orthoclase-Quartz

Luster:

Vitreous - Greasy

Optical Properties of Taikanite

Gladstone-Dale:

CI meas= 0.17 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2094,KPDmeas= 0.1681,KC= 0.2025
Ncalc = 1.77 - 1.96

Optical Data:

Biaxial (+), a=1.775, b=1.792, g=1.814, bire=0.0390, 2V(Calc)=84, 2V(Meas)=74-80.

Calculated Properties of Taikanite

Electron Density:

Bulk Density (Electron Density)=3.48 gm/cc
note: Specific Gravity of Taikanite =3.79 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Taikanite= 148.08 barns/electron
U=PE_Taikanite x rElectron Density= 515.58 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Taikanite is Not Radioactive

Taikanite Classification

Dana Class:

65.03.03.01 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.03)with chains P=4

(65.03.03)Dana Group

65.03.03.01 Taikanite (Ba,Sr)2Mn2Si4O12 C 2 2

Strunz Class:

09.DH.25 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DH -Inosilicates with 4-periodic single chains, Si4O12

09.DH.25 Taikanite (Ba,Sr)2Mn2Si4O12 C 2 2

Other Taikanite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Taikanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Taikanite

(Ba,Sr)2Mn+++2Si4O12
Dana No: 65.03.03.01 Strunz No: 09.DH.25
Locality:

Notes:

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