Taikanite Mineral Data

Taikanite Mineral Data +

[Newest Minerals] [Equipment] [Analytical Services] [About Us] [Mineral Gallery] [eBay Store]
See Also: [Diamond Crystals] [Mineral News] [Hudson Institute] [Minerals on CDROM]
Rare Minerals, Meteorites, Equipment and Analytical Services
Excalibur Mineral Company, World leaders in the supply of rare species
Serving the scientific and collector communities since 1974

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

IMA Status:

Approved IMA 1985

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 39593

PDF 39-335

Search for Taikanite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

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 - SphenoidalH-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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Armbruster T , Oberhansli R , Kunz M , American Mineralogist , 78 (1993) p.1088-1095, Taikanite, BaSr2Mn2O2[Si4O12], from the Wessels mine, South Africa: A chain, silicate related to synthetic Ca3Mn2O2[Si4O12]

Physical Properties of Taikanite

Cleavage:

[001] Perfect

Color:

Greenish black.

Density:

4.72

Diaphaniety:

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

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:

r_electron=3.48 gm/cc
note: r_Taikanite=3.79 gm/cc.

Fermion Index

Fermion Index = 0.06794
Boson Index = 0.93206

Photoelectric:

PE_Taikanite= 148.08 barns/electron
U=PE_Taikanite x r_electron= 515.58 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Taikanite is Not Radioactive

Taikanite Classification

Dana Class:

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

(65.3)with chains P=4

(65.3.3)Dana Group

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

Strunz Class:

VIII/F.25-30 VIII - Silicates

VIII/F - Inosilicates (chain and band) Quadruplet chains [Si4O12]8-

VIII/F.25 - Batisite - Ohmilite series

VIII/F.25-10 Batisite BaNaNaTi2O2[Si4O12] Ima2 mm2

VIII/F.25-20 Shcherbakovite KKNaTi2O(OH)[Si4O12] I mma 2/m 2/m 2/m

VIII/F.25-30 Taikanite (Ba,Sr)2Mn2Si4O12 C 2 2

VIII/F.25-40 Krauskopfite BaSi2O4(OH)2·2(H2O) P 2₁/a 2/m

VIII/F.25-50 Ohmilite Sr3(Ti,Fe)(Si2O6)2(O,OH)·2-3(H2O) P 2₁/m 2/m

Other Taikanite Information

References:

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

Search for Taikanite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Taikanite :

AA Mineral Specimens

B & L Fine Minerals

Crystal Vaults

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

Rockshop.cz

T G Fine Minerals

Wrights Rock Shop

Translate Taikanite Mineral Data :

Ask about Taikanite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Taikanite

(Ba,Sr)2Mn+++2Si4O12
Dana No: 65.3.3.1 Strunz No: VIII/F.25-30
Locality:

Notes: