Mineralogy Database

Balangeroite Mineral Data

Search Webmineral :

General Balangeroite Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe+++,Fe++,Mn++)42Si16O54(OH)40
Help on Composition: Composition: Molecular Weight = 3,377.84 gm
   Magnesium  19.21 %  Mg   31.86 % MgO
   Manganese   2.76 %  Mn    3.57 % MnO
   Iron       19.51 %  Fe   17.02 % FeO /  8.98 % Fe2O3
   Silicon    13.30 %  Si   28.46 % SiO2
   Hydrogen    1.11 %  H     9.95 % H2O
   Oxygen     44.10 %  O
             ______        ______ 
             100.00 %       99.83 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg26.7Fe2+8Fe3+3.8Mn2+1.7Si16O55.8(OH)37.3
Help on Environment: Environment: In shistose serpentinite in proximity to a large ultramafic massif.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Balangero (San Vittore) mine, Piedmont, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Balangeroite + Pronunciation Say BALANGEROITE

Balangeroite Image

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


Comments: Brown fiberous crystals of balangeroite in metamorphic shist.
Location: Mt. S,Vittore, Balangero, Piedmont, Italy. Scale: 5 1/2" x 2 1/4".
© Chris Wright / Wrights Rock Shop

Balangeroite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1:1:0.4974
Help on Cell Dimensions: Cell Dimensions: a = 19.4, b = 19.4, c = 9.65, Z = 2; beta = 88.9° V = 3,631.20 Den(Calc)= 3.09
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.714(1), 6.77(0.8), 2.674(0.75),3.378(0.45), 2.516(0.4), 3.278(0.4), 9.59(0.4),

Physical Properties of Balangeroite

Help on Cleavage: Cleavage: {???} Very Good, {???} Very Good
Help on Color: Color: Brownish yellow, Dark brown.
Help on Density: Density: 2.96 - 3.1, Average = 3.03
Help on Diaphaneity: Diaphaneity: Subtranslucent to Opaque
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: brownish white

Optical Properties of Balangeroite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2201,KPDmeas= 0.2244,KC= 0.2241
Ncalc = 1.66 - 1.69
Help on Optical Data: Optical Data: Biaxial (?), a=1.68, g=1.68, bire=0.0000
Help on Pleochroism (x): Pleochroism (x): dark brown.
Help on Pleochroism (z): Pleochroism (z): yellow brown.

Calculated Properties of Balangeroite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.01 gm/cc
note: Specific Gravity of Balangeroite =3.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEBalangeroite = 7.38 barns/electron
U=PEBalangeroite x rElectron Density= 22.18 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Balangeroite is Not Radioactive

Balangeroite Classification

Help on  Dana Class: Dana Class: (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.03)with chains P=4
  (65.03.02)Gageite group Balangeroite (Mg,Fe,Fe,Mn)42Si16O54(OH)40 P 2/n 2/m Gageite-2M (Mn,Mg,Zn)42Si16O54(OH)40 P 2/n 2/m Gageite (Mn,Mg,Zn)42Si16O54(OH)40 P1 1
Help on  Strunz Class: Strunz Class: 09.DH.35 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DH -Inosilicates with 4-periodic single chains, Si4O12
09.DH.35 Balangeroite (Mg,Fe,Fe,Mn)42Si16O54(OH)40 P 2/n 2/m
09.DH.35 Gageite-2M (Mn,Mg,Zn)42Si16O54(OH)40 P 2/n 2/m
09.DH.35 Gageite (Mn,Mg,Zn)42Si16O54(OH)40 P1 1

Other Balangeroite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Balangeroite :
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 Balangeroite using:

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

Visit our Advertisers for Balangeroite :

Ask about Balangeroite 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 Balangeroite Specimen Label here :


Dana No: Strunz No: 09.DH.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.