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 % B2 O3
Oxygen 50.38 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Mg3 B2 O6
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 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
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEKotoite = 0.97 barns/electronU=PEKotoite x r Electron 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
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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:
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