Mineralogy Database

Jimboite Mineral Data

Search Webmineral :

General Jimboite Information

Help on Chemical  Formula: Chemical Formula: Mn3B2O6
Help on Composition: Composition: Molecular Weight = 282.43 gm
   Manganese  58.36 %  Mn   75.35 % MnO
   Boron       7.65 %  B    24.65 % B2O3
   Oxygen     33.99 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+3B2O6
Help on Environment: Environment: Likely formed by metasomatic reactions between boron-bearing hydrothermal solutions and rhodochrosite in banded manganese deposits.
Help on IMA Status: IMA Status: Approved IMA 1963
Help on Locality: Locality: Kaso mine, Kanuma, Tochigi Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Kotora Jimbo (1867-1924), founder of the Mineralogical Institute, University of Tokyo, Tokyo, Japan.
Help on Name Pronunciation: Name Pronunciation: Jimboite Say JIMBOITE
Help on Synonym: Synonym: ICSD 34561
  PDF 19-781

Jimboite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: Dark red-brown crystalline jimboite veinlet in massive rhodochrosite.
Location: Rito Mine, Azuma Mura, Seta-gun, Gumma, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jimboite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6471:1:0.532
Help on Cell Dimensions: Cell Dimensions: a = 5.64, b = 8.715, c = 4.637, Z = 2; V = 227.92 Den(Calc)= 4.12
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnmn,Pmmn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.78(1), 2.59(0.5), 2.33(0.4),

Physical Properties of Jimboite

Help on Cleavage: Cleavage: {110} Perfect
Help on Color: Color: Light purple brown, Reddish brown.
Help on Density: Density: 3.98
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Jimboite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1947,KPDmeas= 0.2016,KC= 0.2014
Ncalc = 1.8 - 1.83
Help on Optical Data: Optical Data: Biaxial (+), a=1.792, b=1.794, g=1.821, bire=0.0290, 2V(Calc)=32, 2V(Meas)=30.

Calculated Properties of Jimboite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Jimboite =3.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEJimboite = 15.36 barns/electron
U=PEJimboite x rElectron Density= 57.59 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Jimboite is Not Radioactive

Jimboite Classification

Help on  Dana Class: Dana Class: (24)Borates - Anhydrous
  (24.03)where (A)m (B)n [XO3]p
  (24.03.02)Dana Group Kotoite Mg3B2O6 Pnmn 2/m 2/m 2/m Jimboite Mn3B2O6 Pnmn,Pmmn 2/m 2/m 2/m
Help on  Strunz Class: 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 Jimboite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Jimboite :
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

Search for Jimboite using:

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

Visit our Advertisers for Jimboite :

Ask about Jimboite 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 Espaņol

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


Dana No: Strunz No: 06.AA.35





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