Mineralogy Database

Lingunite Mineral Data

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General Lingunite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca)AlSi3O8
Help on Composition: Composition: Molecular Weight = 270.77 gm
   Sodium     4.25 %  Na    5.72 % Na2O
   Calcium    7.40 %  Ca   10.36 % CaO
   Aluminum   9.96 %  Al   18.83 % Al2O3
   Silicon   31.12 %  Si   66.57 % SiO2
   Oxygen    47.27 %  O
            ______        ______ 
            100.00 %      101.48 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.5Ca0.5AlSi3O8
Help on Environment: Environment: Intimately intergrown with feldspathic glass in shock-induced melt veins. Feldspar group high-pressure polymorph of plagioclase believed present below 400 km in the earth.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Sixiangkou L6 chondrite. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Liu Lin-gun (1942-), Chinese mineralogist at the National Taiwan University who first synthesised the mineral.
Help on Synonym: Synonym: IMA2004-054

Lingunite Image

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

Comments: BSE image showing chondritic xenoliths and impact melt veins of lingunite (Lgt). Olivine (Olv), pyroxene (Pyx), maskelynite (Ms glass), ringwoodite (Rgt), and majorite (Mjt). Meteoritics & Planetary Science 43, No 5, 823-828 (2008).
Location: Polished thin section of the Sixiangkou meteorite. Scale: See Image.
© Meteoritics & Planetary Science

Lingunite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.29212
Help on Cell Dimensions: Cell Dimensions: a = 9.263, c = 2.706, Z = 2; V = 232.18 Den(Calc)= 3.87
Help on Crystal System: Crystal System: Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: I 4/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.931(1), 2.032(0.85), 6.55(0.66),4.63(0.6), 1.45(0.42), 1.737(0.37), 2.265(0.35), 1.543(0.33),

Physical Properties of Lingunite

Help on Color: Color: White.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Inclusions - Generally found as inclusions in other minerals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Lingunite

Help on Optical Data: Optical Data: NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.2101) where Ncalc=Dcalc*KC+1

Calculated Properties of Lingunite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.84 gm/cc
note: Specific Gravity of Lingunite =3.87 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PELingunite = 2.46 barns/electron
U=PELingunite x rElectron Density= 9.45 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lingunite is Not Radioactive

Lingunite Classification

Help on  Dana Class: Dana Class: (76)Tectosilicate Al-Si Framework
  (76.01)with Al-Si frameworks
  (76.01.09)Dana Group Lingunite! (Na,Ca)AlSi3O8 I 4/m 4/m
Help on  Strunz Class: Strunz Class: 09.FA.70 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1
09.FA.70 Lingunite! (Na,Ca)AlSi3O8 I 4/m 4/m

Other Lingunite Information

Help on References: References: NAME( Science, 287:1633) PHYS. PROP.(Science, 287:1633)
Help on See Also: See Also: Links to other databases for Lingunite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 09.FA.70





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