Paranatrolite Mineral Data

Paranatrolite Mineral Data +

General Paranatrolite Information

Chemical Formula:

Na2[Al2Si3O10]·3(H2O)

Composition:

Molecular Weight = 415.43 gm

Potassium 2.07 % K 2.49 % K₂O

Sodium 10.24 % Na 13.80 % Na₂O

Calcium 0.58 % Ca 0.81 % CaO

Aluminum 16.50 % Al 31.17 % Al₂O₃

Silicon 18.66 % Si 39.92 % SiO₂

Hydrogen 1.50 % H 13.44 % H₂O

Oxygen 50.45 % O

______ ______

100.00 % 101.64 % = TOTAL OXIDE

Empirical Formula:

Na_1.85K_0.22Ca_0.06Al_2.54Si_2.76O₁₀·3.1(H₂O)

Environment:

Unstable mineral epitaxial on natrolite. Dehydrates to tetranatrolite.

IMA Status:

IMA Status in Question 1998

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:

ICSD 63218

IMA1978-017

PDF 42-1386

Paranatrolite Image

Images:

Paranatrolite

Comments: Translucent prismatic paranatrolite crystal aggregate.
Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Paranatrolite Crystallography

Axial Ratios:

a:b:c =0.3434:1:0.5183

Cell Dimensions:

a = 6.5952, b = 19.204, c = 9.955, Z = 4; beta = 107.737° V = 1,200.91 Den(Calc)= 2.30

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Cc

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

By Intensity(I/I_o): 2.94(1), 5.92(0.6), 4.44(0.4),

Crystal Structure:

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Lee Y , Hriljac J A , Parise J B , Vogt T , American Mineralogist , 90 (2005) p.252-257, Pressure-induced stabilization of ordered paranatrolite: A new, insight into the paranatrolite controversy, Sample: at P = 0.99 GPa

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

Physical Properties of Paranatrolite

Cleavage:

None

Color:

Colorless, White, Pink.

Density:

2.21

Diaphaniety:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Epitaxial - Crystallographic alignment with a precursor mineral

Hardness:

5-5.5 - Apatite-Knife Blade

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Paranatrolite

Optical Data:

NCalc= 1.52 - from Gladstone-Dale relationship (KC = 0.2261) where Ncalc=Dcalc*KC+1
NCalc= 1.5 - from Gladstone-Dale relationship (KC = 0.2261) where Ncalc=Dmeas*KC+1

Calculated Properties of Paranatrolite

Electron Density:

r_electron=2.31 gm/cc
note: r_{Paranatrolite}=2.30 gm/cc.

Fermion Index

Fermion Index = 0.00896
Boson Index = 0.99104

Photoelectric:

PE_{Paranatrolite}= 1.66 barns/electron
U=PE_{Paranatrolite} x r_electron= 3.82 barns/cc.

Radioactivity:

GRapi = 29.95 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Paranatrolite - barely detectable

Paranatrolite Classification

Dana Class:

77.1.5.3 (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.21-20 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 Paranatrolite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8, AmMin 90:522)

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Paranatrolite

Na2[Al2Si3O10]·3(H2O)
Dana No: 77.1.5.3 Strunz No: VIII/J.21-20
Locality:

Notes: