Kotoite Mineral Data

General Kotoite Information

Chemical Formula:

Mg3B2O6

Composition:

Molecular Weight = 190.53 gm

Magnesium 38.27 % Mg 63.46 % MgO

Boron 11.35 % B 36.54 % B₂O₃

Oxygen 50.38 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₃B₂O₆

Environment:

Contact metamorphosed dolomite.

IMA Status:

Valid Species (Pre-IMA) 1939

Locality:

Hol Kol mine, Suan, Korea. Link to MinDat.org Location Data.

Name Origin:

Named for Bundjiro Koto (1856-1935), Japanese geologist.

Name Pronunciation:

Kotoite

Synonym:

ICSD 31385

PDF 381475

Kotoite Image

Images:

Kotoite

Comments: White massive kotoite crystals.
Location: Baita Mine (RÃ©zbÃ¡nya), Nucet, Bihor Co., Romania. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Kotoite Crystallography

Axial Ratios:

a:b:c =0.6413:1:0.5343

Cell Dimensions:

a = 5.398, b = 8.416, c = 4.497, Z = 2; V = 204.30 Den(Calc)= 3.10

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnmn

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

By Intensity(I/I_o): 2.18(1), 2.23(1), 2.67(1),

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

Effenberger H , Pertlik F , Zeitschrift fur Kristallographie , 166 (1984) p.129-140, Verfeinerung der kristallstrukturen der isotypen verbindungen, M3(BO3)2 mit M=Mg, Co und Ni (strukturtyp: kotoit), Locality: synthetic

Physical Properties of Kotoite

Cleavage:

{110} Perfect

Color:

Colorless, White.

Density:

3.04

Diaphaneity:

Transparent

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Hardness:

6.5 - Pyrite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Kotoite

Gladstone-Dale:

CI meas= -0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2127,KPDmeas= 0.2169,KC= 0.2055
Ncalc = 1.62 - 1.64

Optical Data:

Biaxial (+), a=1.652, b=1.653, g=1.673, bire=0.0210, 2V(Calc)=26, 2V(Meas)=21.

Calculated Properties of Kotoite

Electron Density:

Bulk Density (Electron Density)=3.06 gm/cc
note: Specific Gravity of Kotoite =3.10 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Kotoite= 0.97 barns/electron
U=PE_Kotoite x rElectron Density= 2.97 barns/cc.

Radioactivity:

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

Kotoite Classification

Dana Class:

24.03.02.01 (24)Borates - Anhydrous

(24.03)where (A)m (B)n [XO3]p

(24.03.02)Dana Group

24.03.02.01 Kotoite Mg3B2O6 Pnmn 2/m 2/m 2/m

24.03.02.02 Jimboite Mn3B2O6 Pnmn,Pmmn 2/m 2/m 2/m

Strunz Class:

06.AA.35 06 - BORATES

06.A - Monoborates

06.AA -BO3, without additional anions; 1(D)

06.AA.35 Jimboite Mn3B2O6 Pnmn,Pmmn 2/m 2/m 2/m

06.AA.35 Kotoite Mg3B2O6 Pnmn 2/m 2/m 2/m

Other Kotoite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Kotoite :
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

Search for Kotoite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Kotoite :

A Bijoux Google Search for Kotoite
Adam's Minerals Google Search for Kotoite
Cape Minerals Google Search for Kotoite
Dakota Matrix Minerals Google Search for Kotoite
Excalibur Mineral Corp. Google Search for Kotoite
Exceptional Minerals Google Search for Kotoite
John Betts Fine Minerals Search for Kotoite
McDougall Minerals Google Search for Kotoite
Mineral News Website Link
Rock and Mineral Shows Google Search for Kotoite
Weinrich Minerals, Inc. Google Search for Kotoite

Ask about Kotoite 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 Kotoite Specimen Label here :

Kotoite

Mg3B2O6
Dana No: 24.03.02.01 Strunz No: 06.AA.35
Locality:

Notes: