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 - Dipyramidal H-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),

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 :

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:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.