Mullite Mineral Data

Mullite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


Desert Winds Gems and Minerals
[Mineral Galleries] [About Me] [e-Bay Items] [Latest News] [How to Order]
A Diverse Selection of Beautifully Unique Gem & Mineral Specimens
Desert Winds Gems & Minerals • For All Levels of Collectors Worldwide
Aesthetic & Rare Mineral Specimens • Regular Updates


General Mullite Information

Help on Chemical Formula: Chemical Formula: Al(4+2x)Si(2-2x)O(10-x) where x =0.17 to 0.59
Help on Composition: Composition: Molecular Weight = 319.54 gm
   Aluminum  38.00 %  Al   71.79 % Al2O3
   Silicon   13.18 %  Si   28.21 % SiO2
   Oxygen    48.82 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Al4.5Si1.5O9.75
Help on Environment: Environment: Remelted Tertiary-aged clays.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1924
Help on Locality: Locality: Isle of Mull, Scotland, England. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Mullite Say MULLITE
 

Mullite Image

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

Mullite

Comments: Opaque white mullite masses with mica.
Location: Nijar, Almeria, Andalucia, Spain. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
Click Here for Larger Mullite Image in a New Browser Window Images:
Click Here for Larger Mullite Image

Mullite

Comments: Surface of a kaolinite stratum altered to white mullite by a prehistoric coal-seam-fire..
Location: Mt. Wingen (Burning Mountain), NSW, Australia. Scale: Picture size 6x4 cm.
© Dave Barthelmy

Mullite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9865:1:0.3757
Help on Cell Dimensions: Cell Dimensions: a = 7.5785, b = 7.6817, c = 2.8864, Z = 1; V = 168.03 Den(Calc)= 3.16
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.39(1), 3.428(0.95), 2.206(0.6),
Click Here for Large Mullite Structure Window 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


Angel R J , Prewitt C T , American Mineralogist , 71 (1986) p.1476-1482, Crystal structure of mullite: A re-examination of the average structure

View Additional jPOWD Structure files for Mullite
[1] [10] [11] [2] [3] [4] [5] [6] [7] [8] [9]
 

Physical Properties of Mullite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Colorless, Violet, Yellow, White, Light pink.
Help on Density: Density: 3 - 3.1, Average = 3.05
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Mullite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2071,KPDmeas= 0.2146,KC= 0.2073
Ncalc = 1.62 - 1.66
Help on Optical Data: Optical Data: Biaxial (+), a=1.642-1.653, b=1.644-1.655, g=1.654-1.679, bire=0.0120-0.0260, 2V(Calc)=34-50, 2V(Meas)=20-50. Dispersion r > v.
Help on Pleochroism (x): Pleochroism (x): colorless or colorless.
Help on Pleochroism (y): Pleochroism (y): colorless or colorless.
 

Calculated Properties of Mullite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.12 gm/cc
note: Specific Gravity of Mullite =3.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0063912836
Boson Index = 0.9936087164
Help on Photoelectric: Photoelectric: PEMullite = 1.62 barns/electron
U=PEMullite x rElectron Density= 5.04 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mullite is Not Radioactive
 

Mullite Classification
Help on Dana Class: Dana Class: 52.02.02a.02 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.02)with cations in [4] and >[4] coordination
  (52.02.02a)Al2SiO5 (Sillimanite subgroup)
 
52.02.02a.01 Sillimanite Al2SiO5=Al[6]Al[4]OSiO4 P nma 2/m 2/m 2/m
 
52.02.02a.02 Mullite Al(42x)Si(2-2x)O(10-x)wherex=0.17to0.59 Pbam 2/m 2/m 2/m
 
52.02.02a.03 Boromullite! Al4.5SiB0.5O9.5 C mc21 mm2
Help on Strunz Class: Strunz Class: 09.AF.20 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AF -Nesosilicates with additional anions;
 
09.AF.20 Mullite Al(42x)Si(2-2x)O(10-x)wherex=0.17to0.59 Pbam 2/m 2/m 2/m
 

Other Mullite Information
Help on See Also: See Also: Links to other databases for Mullite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

Search for Mullite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Mullite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Mullite Mineral Data :

Ask about Mullite 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 Mullite Specimen Label here :

Mullite

Al(4+2x)Si(2-2x)O(10-x) where x =0.17 to 0.59
Dana No: 52.02.02a.02 Strunz No: 09.AF.20
Locality:

 

Notes: