Lisetite Mineral Data

Lisetite Mineral Data +

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General Lisetite Information

Chemical Formula:

Na2CaAl4Si4O16

Composition:

Molecular Weight = 562.32 gm

Sodium 8.18 % Na 11.02 % Na₂O

Calcium 7.13 % Ca 9.97 % CaO

Aluminum 19.19 % Al 36.26 % Al₂O₃

Silicon 19.98 % Si 42.74 % SiO₂

Oxygen 45.52 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂CaAl₄Si₄O₁₆

IMA Status:

Approved IMA 1986

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 20212

PDF 39-386

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Lisetite Crystallography

Axial Ratios:

a:b:c =0.4834:1:0.565

Cell Dimensions:

a = 8.26, b = 17.086, c = 9.654, Z = 4; V = 1,362.47 Den(Calc)= 2.74

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pbc2

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

By Intensity(I/I_o): 3.198(1), 4.162(0.44), 3.468(0.36),

Crystal Structure:

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Rossi G , Oberti R , Smith D C , American Mineralogist , 71 (1986) p.1378-1383, Crystal structure of lisetite, CaNa2Al4Si4O16

Physical Properties of Lisetite

Color:

Colorless.

Diaphaniety:

Transparent

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Lisetite

Gladstone-Dale:

CI calc= -0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2062,KC= 0.2059

Optical Data:

Biaxial (?), a=1.56, g=1.57, bire=0.0100

Calculated Properties of Lisetite

Electron Density:

r_electron=2.71 gm/cc
note: r_Lisetite=2.74 gm/cc.

Fermion Index

Fermion Index = 0.00964
Boson Index = 0.99036

Photoelectric:

PE_Lisetite= 2.34 barns/electron
U=PE_Lisetite x r_electron= 6.33 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lisetite is Not Radioactive

Lisetite Classification

Dana Class:

76.1.6.3 (76)Tectosilicate Al-Si Framework

(76.1)with Al-Si frameworks

(76.1.6)Banalsite group

76.1.6.1 Banalsite BaNa2Al4Si4O16 I bam 2/m 2/m 2/m

76.1.6.2 Stronalsite SrNa2Al4Si4O16 I bam,Iba2 Ortho

76.1.6.3 Lisetite Na2CaAl4Si4O16 Pbc2 mm2

76.1.6.4 Svyatoslavite CaAl2Si2O8 P 2₁ 2

Strunz Class:

VIII/J.01-10 VIII - Silicates

VIII/J - Tectosilicates (network) without anions unfamiliar to the tetraheders

VIII/J.01 - Lisetite series

VIII/J.01-10 Lisetite Na2CaAl4Si4O16 Pbc2 mm2

Other Lisetite Information

References:

PHYS. PROP.(Am.Min.,Vol.71,p1372-1377,1986) OPTIC PROP.(Am.Min.,Vol.71,p1372-1377,1986)

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

Lisetite

Na2CaAl4Si4O16
Dana No: 76.1.6.3 Strunz No: VIII/J.01-10
Locality:

Notes: