Mineralogy Database

Indialite Mineral Data

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General Indialite Information

Help on Chemical  Formula: Chemical Formula: Mg2Al4Si5O18
Help on Composition: Composition: Molecular Weight = 584.95 gm
   Magnesium   8.31 %  Mg   13.78 % MgO
   Aluminum   18.45 %  Al   34.86 % Al2O3
   Silicon    24.01 %  Si   51.36 % SiO2
   Oxygen     49.23 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg2Al4Si5O18
Help on Environment: Environment: Formed by fusion and recrystallization of sedimentary rocks as a result of the burning of underlying coal seams. High temperature polymorph of cordierite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1954
Help on Locality: Locality: Bokaro coal seam, southwest of Hazaribagh, Bihar, India. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality
Help on Name Pronunciation: Name Pronunciation: Indialite + Pronunciation Say INDIALITE
Help on Synonym: Synonym: ICSD 200127
  PDF 13-293
 

Indialite Image

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  Indialite

Comments: Gray glassy crystalline indialite in rock.
Location: Daimonji yama, Kyoto-shi, Kyoto, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Indialite

Comments: SEM images of indialite clusters. (AmMin, 89:3).
Location: Somma-Vesuvius volcano in unusual pyrometamorphic ejecta. Scale: Scale bar 100 µ-m.
© American Mineralogist

Indialite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.95301
Help on Cell Dimensions: Cell Dimensions: a = 9.812, c = 9.351, Z = 2; V = 779.66 Den(Calc)= 2.49
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.48(1), 3.037(0.55), 4.096(0.55),
 

Physical Properties of Indialite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless, Pale mauve.
Help on Density: Density: 2.51
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 7-7.5 - Quartz-Garnet
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Indialite

Help on Dichroism (e): Dichroism (e): none.
Help on Dichroism (w): Dichroism (w): none.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2152,KPDmeas= 0.2134,KC= 0.2065
Ncalc = 1.51 - 1.52
Help on Optical Data: Optical Data: Uniaxial (-), e=1.532-1.535, w=1.537-1.539, bire=0.0040-0.0050.
 

Calculated Properties of Indialite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.49 gm/cc
note: Specific Gravity of Indialite =2.51 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEIndialite = 1.65 barns/electron
U=PEIndialite x rElectron Density= 4.10 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Indialite is Not Radioactive
 

Indialite Classification

Help on  Dana Class: Dana Class: 61.01.01.03 (61)Cyclosilicate Six-Membered Rings
  (61.01)with [Si6O18] rings; possible (OH) and Al substitution
  (61.01.01)Beryl group
 
61.01.01.01 Beryl Be3Al2Si6O18 P 6/mmc 6/m 2/m 2/m
 
61.01.01.02 Bazzite Be3(Sc,Al)2Si6O18 P 6/mcc 6/m 2/m 2/m
 
61.01.01.03 Indialite Mg2Al4Si5O18 P 6/mcc 6/m 2/m 2/m
 
61.01.01.04 Stoppaniite! (Fe,Al,Mg)4(Na,[])2[Be6Si12O36]•2(H2O) P 6/mmc 6/m 2/m 2/m
 
61.01.01.05 Pezzottaite! Cs(Be2Li)Al2Si6O18 R 3c 3m
Help on  Strunz Class: Strunz Class: 09.CJ.05 09 - SILICATES (Germanates)
  09.C - Cyclosilicates
  09.CJ -[Si6O18]12- 6-membered single rings (sechser-Einfachringe),
 
09.CJ.05 Beryl Be3Al2Si6O18 P 6/mmc 6/m 2/m 2/m
 
09.CJ.05 Bazzite Be3(Sc,Al)2Si6O18 P 6/mcc 6/m 2/m 2/m
 
09.CJ.05 Indialite Mg2Al4Si5O18 P 6/mcc 6/m 2/m 2/m
 
09.CJ.05 Stoppaniite! (Fe,Al,Mg)4(Na,[])2[Be6Si12O36]•2(H2O) P 6/mmc 6/m 2/m 2/m
 
09.CJ.05 Pezzottaite! Cs(Be2Li)Al2Si6O18 R 3c 3m
 

Other Indialite 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 Indialite :
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 Indialite Specimen Label here :

Indialite

Mg2Al4Si5O18
Dana No: 61.01.01.03 Strunz No: 09.CJ.05
Locality:

 

Notes:

 

 
   
 


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