Leucite Mineral Data

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


Dan Weinrich Auctions
[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Weinrich Minerals Auctions, Inc
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!


General Leucite Information

Help on Chemical Formula: Chemical Formula: KAlSi2O6
Help on Composition: Composition: Molecular Weight = 218.25 gm
   Potassium  17.91 %  K    21.58 % K2O
   Aluminum   12.36 %  Al   23.36 % Al2O3
   Silicon    25.74 %  Si   55.06 % SiO2
   Oxygen     43.99 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KAl(Si2O6)
Help on Environment: Environment: Acid volcanic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1791
Help on Locality: Locality: Bearpaw Mountains., Montana, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek leukos - "white."
Help on Name Pronunciation: Name Pronunciation: Leucite Say LEUCITE
Help on Synonym: Synonym: Amphigene
 

Leucite Image

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

Leucite

Comments: Large single crystal of dark gray leucite.
Location: Roccamonfina, Caserta Province, Campania, Italy. Scale: 20x20x20 mm.
© John Betts - Fine Minerals

Leucite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.05042
Help on Cell Dimensions: Cell Dimensions: a = 13.09, c = 13.75, Z = 16; V = 2,356.04 Den(Calc)= 2.46
Help on Crystal System: Crystal System: Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 41/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.266(1), 3.438(0.85), 5.39(0.8),
Click Here for Large Leucite 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


Mazzi F , Galli E , Gottardi G , American Mineralogist , 61 (1976) p.108-115, The crystal structure of tetragonal leucite

View Additional jPOWD Structure files for Leucite
[1] [2] [3] [4] [5] [6] [7] [8]
 

Physical Properties of Leucite

Help on Cleavage: Cleavage: {110} Indistinct
Help on Color: Color: Colorless, Gray, Yellow gray, White.
Help on Density: Density: 2.47
Help on Diaphaneity: Diaphaneity: Translucent to transparent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Leucite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2072,KPDmeas= 0.2064,KC= 0.2052
Ncalc = 1.5 - 1.51
Help on Optical Data: Optical Data: Isotropic, n=1.508-1.511.
 

Calculated Properties of Leucite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.44 gm/cc
note: Specific Gravity of Leucite =2.47 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PELeucite = 3.14 barns/electron
U=PELeucite x relectron= 7.67 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 255.81 (Gamma Ray American Petroleum Institute Units)
Concentration of Leucite per GRapi unit = 0.39 (%)

Estimated Radioactivity from Leucite - barely detectable

 

Leucite Classification
Help on Dana Class: Dana Class: 76.02.02.01 (76)Tectosilicate Al-Si Framework
  (76.02)Feldspathoids and related species
  (76.02.02)Leucite group
 
76.02.02.01 Leucite KAlSi2O6 I 41/a 4/m
 
76.02.02.02 Ammonioleucite (NH4,K)AlSi2O6 I 41/a 4/m
Help on Strunz Class: Strunz Class: 09.GB.05 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GB -Chains of single connected 4-membered rings
 
09.GB.05 Ammonioleucite (NH4,K)AlSi2O6 I 41/a 4/m
 
09.GB.05 Analcime NaAlSi2O6•(H2O) P1 1
 
09.GB.05 Hsianghualite Ca3Li2Be3(SiO4)3F2 I 213 2 3
 
09.GB.05 Lithosite K6Al4Si8O25•(H2O) P 21 (pseudo ORTH) 2
 
09.GB.05 Leucite KAlSi2O6 I 41/a 4/m
 
09.GB.05 Pollucite (Cs,Na)2Al2Si4O12•(H2O) I a3d 4/m 3 2/m
 
09.GB.05 Wairakite CaAl2Si4O12•2(H2O) I2/a 2/m
 

Other Leucite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68)
Help on See Also: See Also: Links to other databases for Leucite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Glendale Community College
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Minerals in Thin Section-University of North Carolina
15 - Minerals in Thin Sections-Humboldt State
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - Tradeshop.com - The Rainbow of Gems
20 - UCLA - Petrography Thin-Sections
21 - WWW-MINCRYST

Search for Leucite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Leucite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Leucite Mineral Data :

Ask about Leucite 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 Leucite Specimen Label here :

Leucite

KAlSi2O6
Dana No: 76.02.02.01 Strunz No: 09.GB.05
Locality:

 

Notes: