Mineralogy Database

Nagashimalite Mineral Data

Search Webmineral :
  
Advertisment

General Nagashimalite Information

Help on Chemical  Formula: Chemical Formula: Ba4(V+++,Ti)4Si8B2O27Cl(O,OH)2
Help on Composition: Composition: Molecular Weight = 1,496.26 gm
   Barium    36.71 %  Ba   40.99 % BaO
   Titanium   3.20 %  Ti    5.34 % TiO2
   Vanadium  10.21 %  V    15.03 % V2O3
   Silicon   15.02 %  Si   32.13 % SiO2
   Boron      1.44 %  B     4.65 % B2O3
   Hydrogen   0.03 %  H     0.30 % H2O
   Chlorine   2.37 %  Cl    2.37 % Cl
               -   %   Cl   -0.53 % -O=Cl2   
   Oxygen    31.01 %  O
            ______        ______ 
            100.00 %      100.27 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba4V3+3TiSi8B2O28.5Cl(OH)0.5
Help on Environment: Environment: In fissures cutting massive rhodonite ore in a bedded manganese deposit.
Help on IMA Status: IMA Status: Approved IMA 1980
Help on Locality: Locality: Mogurazawa mine, Honshu, Kiryu, Gumma Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Otokichi Nagashima (1890{1969), pioneer Japanese amateur mineralogist,
Help on Name Pronunciation: Name Pronunciation: Nagashimalite + Pronunciation Say NAGASHIMALITE
Help on Synonym: Synonym: ICSD 201047
  PDF 33-188
 

Nagashimalite Image

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

  Nagashimalite

Comments: SEM image of a prismatic, striated nagashimalite crystal.
Location: Mogurazawa mine, Honshu, Kiryu, Gumma Prefecture, Japan. Scale: Scale Bar 0.05 mm.
© Mineralogical Journal

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

  Nagashimalite

Comments: Dark olive green translucent to opaque bladed nagashimalite crystals on in pale pink rhodonite.
Location: Mogurazawa mine, Kiryuu City, Gunma Prefecture, Kanto Region, Honshu Island, Japan. Scale: Picture Size 3 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Nagashimalite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.1497:1:0.587
Help on Cell Dimensions: Cell Dimensions: a = 13.937, b = 12.122, c = 7.116, Z = 2; V = 1,202.21 Den(Calc)= 4.13
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmmn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.02(1), 3.03(0.6), 2.592(0.28),
 

Physical Properties of Nagashimalite

Help on Cleavage: Cleavage: None
Help on Color: Color: Greenish black.
Help on Density: Density: 4.08
Help on Diaphaneity: Diaphaneity: Opaque to translucent
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: green
 

Optical Properties of Nagashimalite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.071 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.082 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1843,KPDmeas= 0.1865,KC= 0.2007
Ncalc = 1.82 - 1.83
Help on Optical Data: Optical Data: Biaxial (+), a=1.75, b=1.753, g=1.78, bire=0.0300, 2V(Calc)=38, 2V(Meas)=30.
Help on Pleochroism (x): Pleochroism (x): greenish yellow.
Help on Pleochroism (y): Pleochroism (y): green.
Help on Pleochroism (z): Pleochroism (z): greenish brown.
 

Calculated Properties of Nagashimalite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.74 gm/cc
note: Specific Gravity of Nagashimalite =4.08 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.07
Boson Index = 0.93
Help on Photoelectric: Photoelectric: PENagashimalite = 163.75 barns/electron
U=PENagashimalite x rElectron Density= 613.06 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Nagashimalite is Not Radioactive
 

Nagashimalite Classification

Help on  Dana Class: Dana Class: 64.03.01.03 (64)Cyclosilicates
  (64.03)4-membered rings with [Si2O7] dimers
  (64.03.01)Taramellite group
 
64.03.01.01 Taramellite Ba4(Fe,Ti,Fe,Mg)4(B2Si8O27)O2Clx(x=0to1) Pmmn 2/m 2/m 2/m
 
64.03.01.02 Titantaramellite Ba4(Ti,Fe,Fe,Mg)4(B2Si8O27)O2ClxX=0TO1,withTi>Fe Pmmn 2/m 2/m 2/m
 
64.03.01.03 Nagashimalite Ba4(V,Ti)4Si8B2O27Cl(O,OH)2 Pmmn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.CE.20 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),
 
09.CE.20 Nagashimalite Ba4(V,Ti)4Si8B2O27Cl(O,OH)2 Pmmn 2/m 2/m 2/m
 
09.CE.20 Titantaramellite Ba4(Ti,Fe,Fe,Mg)4(B2Si8O27)O2ClxX=0TO1,withTi>Fe Pmmn 2/m 2/m 2/m
 
09.CE.20 Taramellite Ba4(Fe,Ti,Fe,Mg)4(B2Si8O27)O2Clx(x=0to1) Pmmn 2/m 2/m 2/m
 

Other Nagashimalite Information

Help on References: References: NAME( AntBidBlaNic2) 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 Nagashimalite :
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 Nagashimalite using:

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

Visit our Advertisers for Nagashimalite :

Ask about Nagashimalite 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 Nagashimalite Specimen Label here :

Nagashimalite

Ba4(V+++,Ti)4Si8B2O27Cl(O,OH)2
Dana No: 64.03.01.03 Strunz No: 09.CE.20
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.