Lingunite Mineral Data

General Lingunite Information

Chemical Formula:

(Na,Ca)AlSi3O8

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

Empirical Formula:

Na_0.5Ca_0.5AlSi₃O₈

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.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Sixiangkou L6 chondrite. Link to MinDat.org Location Data.

Name Origin:

Named for Liu Lin-gun (1942-), Chinese mineralogist at the National Taiwan University who first synthesised the mineral.

Synonym:

IMA2004-054

NaAlSi3O8-hollandite

Lingunite Image

Images:

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

Axial Ratios:

a:c = 1:0.29212

Cell Dimensions:

a = 9.263, c = 2.706, Z = 2; V = 232.18 Den(Calc)= 3.87

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/I_o): 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

Color:

White.

Diaphaneity:

Transparent

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Lingunite

Optical Data:

NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.2101) where Ncalc=Dcalc*KC+1

Calculated Properties of Lingunite

Electron Density:

Bulk Density (Electron Density)=3.84 gm/cc
note: Specific Gravity of Lingunite =3.87 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Lingunite= 2.46 barns/electron
U=PE_Lingunite x rElectron Density= 9.45 barns/cc.

Radioactivity:

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

Lingunite Classification

Dana Class:

76.01.09.01 (76)Tectosilicate Al-Si Framework

(76.01)with Al-Si frameworks

(76.01.09)Dana Group

76.01.09.01 Lingunite! (Na,Ca)AlSi3O8 I 4/m 4/m

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

References:

NAME( Science, 287:1633) PHYS. PROP.(Science, 287:1633)

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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Print or Cut-and-Paste your Lingunite Specimen Label here :

Lingunite

(Na,Ca)AlSi3O8
Dana No: 76.01.09.01 Strunz No: 09.FA.70
Locality:

Notes:

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