Indialite Mineral Data

Advertisment

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

Your premier supplier of quality mineral specimens from Southern Africa and the world at large

A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals

Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.

General Indialite Information

Chemical Formula:

Mg2Al4Si5O18

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

Empirical Formula:

Mg₂Al₄Si₅O₁₈

Environment:

Formed by fusion and recrystallization of sedimentary rocks as a result of the burning of underlying coal seams. High temperature polymorph of cordierite.

IMA Status:

Valid Species (Pre-IMA) 1954

Locality:

Bokaro coal seam, southwest of Hazaribagh, Bihar, India. Link to MinDat.org Location Data.

Name Origin:

Named for the locality

Name Pronunciation:

Indialite + Pronunciation

Synonym:

ICSD 200127

PDF 13-293

Indialite Image

Images:

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

Images:

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

Axial Ratios:

a:c = 1:0.95301

Cell Dimensions:

a = 9.812, c = 9.351, Z = 2; V = 779.66 Den(Calc)= 2.49

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6/mcc

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 8.48(1), 3.037(0.55), 4.096(0.55),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Balassone G , Franco E , Mattia C A , Puliti R , American Mineralogist , 89 (2004) p.1-6, Indialite in xenolithic rocks from Somma-Vesuvius volcano (Southern Italy):, Crystal chemistry and petrogenetic features

View Additional jPOWD Structure files for Indialite
[1] [2]

Physical Properties of Indialite

Cleavage:

None

Color:

Colorless, Pale mauve.

Density:

2.51

Diaphaneity:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Hexagonal - Six-sided crystal shape in cross-section or habit.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

7-7.5 - Quartz-Garnet

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Indialite

Dichroism (e):

none.

Dichroism (w):

none.

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

Optical Data:

Uniaxial (-), e=1.532-1.535, w=1.537-1.539, bire=0.0040-0.0050.

Calculated Properties of Indialite

Electron Density:

Bulk Density (Electron Density)=2.49 gm/cc
note: Specific Gravity of Indialite =2.51 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Indialite= 1.65 barns/electron
U=PE_Indialite x rElectron Density= 4.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Indialite is Not Radioactive

Indialite Classification

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

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

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)

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

Search for Indialite using:

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

Visit our Advertisers for Indialite :

A Bijoux Google Search for Indialite
Adam's Minerals Google Search for Indialite
Cape Minerals Google Search for Indialite
Dakota Matrix Minerals Google Search for Indialite
Excalibur Mineral Corp. Google Search for Indialite
Exceptional Minerals Google Search for Indialite
John Betts Fine Minerals Search for Indialite
McDougall Minerals Google Search for Indialite
Mineral News Website Link
Rock and Mineral Shows Google Search for Indialite
Weinrich Minerals, Inc. Google Search for Indialite

Ask about Indialite 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 Español

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: