Tetranatrolite Mineral Data

Tetranatrolite Mineral Data +

General Tetranatrolite Information

Chemical Formula:

Na2[Al2Si3O10]·2(H2O)

Composition:

Molecular Weight = 380.22 gm

Sodium 12.09 % Na 16.30 % Na₂O

Aluminum 14.19 % Al 26.82 % Al₂O₃

Silicon 22.16 % Si 47.41 % SiO₂

Hydrogen 1.06 % H 9.48 % H₂O

Oxygen 50.49 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂Al₂Si₃O₁₀·2(H₂O)

Environment:

Dehydration product of paranatrolite. Discredited as identical to gonnardite (AmMin, v 84, p 1445; and v 86, p 588).

IMA Status:

Discredited IMA 1999

Locality:

Mont Saint-Hilaire, Quebec, Canada. Link to MinDat.org Location Data.

Name Origin:

The name given in 1980 recognizes its association with and similarity in chemical composition to natrolite.

Synonym:

Discredited

ICSD 39904

PDF 33-1205

Tetranatrolite Image

Images:

Click Here for Larger Tetranatrolite Image

Tetranatrolite Gonnardite

Comments: White, pseudocubic crystals of tetranatrolite (gonnardite) on matrix.
Location: Point of Rocks Mesa, Colfax County, New Mexico, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Tetranatrolite Crystallography

Axial Ratios:

a:c = 1:0.50806

Cell Dimensions:

a = 13.02, c = 6.615, Z = 4; V = 1,121.38 Den(Calc)= 2.25

Crystal System:

Tetragonal - ScalenohedralH-M Symbol (4 2m) Space Group: I 42d

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

By Intensity(I/I_o): 2.867(1), 4.387(0.5), 6.549(0.5),

Crystal Structure:

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Evans H T , Konnert J A , Ross M , American Mineralogist , 85 (2000) p.1808-1815, The crystal structure of tetranatrolite from Mont Saint-Hilaire, Quebec, and its, chemical and structural relationship to paranatrolite and gonnardite

View Additional jPOWD Structure files for Tetranatrolite
[1] [2] [3] [4] [5]

Physical Properties of Tetranatrolite

Cleavage:

None

Color:

White, Pale pink.

Density:

2.28

Diaphaniety:

Translucent to Opaque

Hardness:

5 - Apatite

Luminescence:

Fluorescent.

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Tetranatrolite

Dichroism (e):

colorless.

Dichroism (w):

colorless.

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2171,KPDmeas= 0.2143,KC= 0.2173

Optical Data:

Uniaxial (+), w=1.481, e=1.496, bire=0.0150.

Calculated Properties of Tetranatrolite

Electron Density:

r_electron=2.25 gm/cc
note: r_{Tetranatrolite}=2.25 gm/cc.

Fermion Index

Fermion Index = 0.01059
Boson Index = 0.98941

Photoelectric:

PE_{Tetranatrolite}= 1.48 barns/electron
U=PE_{Tetranatrolite} x r_electron= 3.32 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tetranatrolite is Not Radioactive

Tetranatrolite Classification

Dana Class:

77.1.5.2 (77)Tectosilicate Zeolite group

(77.1)true zeolites

(77.1.5)Natrolite and related species

77.1.5.1 Natrolite Na2[Al2Si3O10]·2(H2O) F dd2 mm2

77.1.5.2 Tetranatrolite ? Na2[Al2Si3O10]·2(H2O) I 42d 4 2m

77.1.5.3 Paranatrolite Na2[Al2Si3O10]·3(H2O) Cc m

77.1.5.4 Mesolite Na2Ca2Al6Si9O30·8(H2O) C 2 2

77.1.5.5 Scolecite CaAl2Si3O10·3(H2O) Cc m

77.1.5.6 Edingtonite BaAl2Si3O10·4(H2O) P 2₁2₁2 2 2 2

77.1.5.7 Gonnardite Na2CaAl4Si6O20·7(H2O) I 42d 4 2m

77.1.5.8 Cowlesite CaAl2Si3O10·5-6(H2O) P 222₁, P mmm, Pmm2 Ortho

77.1.5.9 Thomsonite-Ca NaCa2Al5Si5O20·6(H2O) Pncn 2/m 2/m 2/m

77.1.5.10 Thomsonite-Sr! (Sr,Ca)2Na[Al5Si5O20]·7(H2O) Pcnn 2/m 2/m 2/m

77.1.5.11 Nabesite! Na2BeSi4O10·4(H2O) P 2₁2₁2₁ 2 2 2

Strunz Class:

VIII/J.21-30 VIII - Silicates

VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites

VIII/J.21 - Zeolite group, Natrolite - Thomsonite series

VIII/J.21-10 Natrolite Na2[Al2Si3O10]·2(H2O) F dd2 mm2

VIII/J.21-20 Paranatrolite Na2[Al2Si3O10]·3(H2O) Cc m

VIII/J.21-30 Tetranatrolite Na2[Al2Si3O10]·2(H2O) I 42d 4 2m

VIII/J.21-40 Gonnardite Na2CaAl4Si6O20·7(H2O) I 42d 4 2m

VIII/J.21-50 Mesolite Na2Ca2Al6Si9O30·8(H2O) C 2 2

VIII/J.21-60 Scolecite CaAl2Si3O10·3(H2O) Cc m

VIII/J.21-70 Thomsonite-Ca NaCa2Al5Si5O20·6(H2O) Pncn 2/m 2/m 2/m

VIII/J.21-80 Thomsonite-Sr! (Sr,Ca)2Na[Al5Si5O20]·7(H2O) Pcnn 2/m 2/m 2/m

Other Tetranatrolite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Tetranatrolite

Na2[Al2Si3O10]·2(H2O)
Dana No: 77.1.5.2 Strunz No: VIII/J.21-30
Locality:

Notes: