Natrolite Mineral Data

Natrolite Mineral Data +

General Natrolite 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:

Occurs in the cavities of amygdaloidal basalts and other related rocks.

IMA Status:

Valid Species (Pre-IMA) 1803

Locality:

Bohemia of Czechoslovakia. Link to MinDat.org Location Data.

Name Origin:

From the Greek natron, "soda," in allusion to sodium content and lithos - "stone."

Synonym:

Aedelite

Apoanalcite

Bergmannite

Mesotype

Natrolite Image

Images:

Natrolite Eudialyte

Comments: Druse of gemmy, red eudialyte crystals to 1 mm on white natrolite.
Location: Mt. St. Hilaire, Quebec, Canada. Scale: Picture size 1.5 cm.
© John Veevaert

Images:

Natrolite

Comments: Transparent prismatic crystals of natrolite.
Location: Usti (Aussig), Bohemia, Czech Republic. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Natrolite Neptunite

Comments: Jet-black square prisms of neptunite etched out of the enclosing white natrolite with minor benitoite.
Location: Benitoite Gem Mine. San Benito Co. California, USA. Scale: 6.5 x 6 cm.
© Fabre Minerals

Images:

Natrolite Serandite Analcime

Comments: Orange-red, blocky serandite with white, blocky natrolite and white, equant grains of analcime.
Location: Mt. St. Hilaire, Canada. Scale: 4 x 3 cm.
© Fabre Minerals

Natrolite Crystallography

Axial Ratios:

a:b:c =0.9829:1:0.3529

Cell Dimensions:

a = 18.27, b = 18.587, c = 6.56, Z = 8; V = 2,227.67 Den(Calc)= 2.27

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: F dd2

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

By Intensity(I/I_o): 2.85(1), 5.89(0.85), 2.87(0.8),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: [ 0 1 0] [ 1 1 0] [ 1 0 0] [ 1 1 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Peacor D R , American Mineralogist , 58 (1973) p.676-680, High temperature, single-crystal X-Ray study of natrolite, T = 25 C

View Additional jPOWD Structure files for Natrolite
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [2] [3] [4] [5] [6] [7] [8] [9] [NH4]

Physical Properties of Natrolite

Cleavage:

[110] Perfect, [010] Imperfect

Color:

White, Colorless, Red, Yellowish white, Reddish white.

Density:

2.25

Diaphaniety:

Transparent to translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luminescence:

None.

Luster:

Vitreous - Silky

Streak:

white

Optical Properties of Natrolite

Gladstone-Dale:

CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.015 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2141,KPDmeas= 0.216,KC= 0.2173

Optical Data:

Biaxial (+), a=1.473-1.489, b=1.476-1.491, g=1.485-1.502, bire=0.0120-0.0130, 2V(Calc)=48-62, 2V(Meas)=60-63. Dispersion weak, r < v.

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Natrolite

Electron Density:

r_electron=2.25 gm/cc
note: r_Natrolite=2.25 gm/cc.

Fermion Index

Fermion Index = 0.01059
Boson Index = 0.98941

Photoelectric:

PE_Natrolite= 1.48 barns/electron
U=PE_Natrolite x r_electron= 3.32 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Natrolite is Not Radioactive

Natrolite Classification

Dana Class:

77.1.5.1 (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.21-10 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 Natrolite Information

References:

NAME( Sinkankas66) PHYS. PROP.(Dana8) OPTIC PROP.(Heinrich65)

Search for Natrolite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Natrolite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Natrolite Mineral Data :

Ask about Natrolite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Natrolite

Na2[Al2Si3O10]·2(H2O)
Dana No: 77.1.5.1 Strunz No: VIII/J.21-10
Locality:

Notes: