Analcime Mineral Data

Analcime Mineral Data +

General Analcime Information

Chemical Formula:

NaAlSi2O6·(H2O)

Composition:

Molecular Weight = 220.15 gm

Sodium 10.44 % Na 14.08 % Na₂O

Aluminum 12.26 % Al 23.16 % Al₂O₃

Silicon 25.51 % Si 54.58 % SiO₂

Hydrogen 0.92 % H 8.18 % H₂O

Oxygen 50.87 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaAl(Si₂O₆)·(H₂O)

Environment:

Occurs frequently in basalts and other basic igneous rocks associated with other zeolites.

IMA Status:

Valid Species (Pre-IMA) 1801

Locality:

From near Catanes, Cyclopean Isles, Italy. Link to MinDat.org Location Data.

Name Origin:

From the Greek word meaning weak, referring to a weak electrical charge developed on rubbing.

Synonym:

Analcidite

Analcite

Analzim

ICSD 2930

PDF 42-1378

Analcime Image

Images:

Analcime

Comments: Brownish yellow transparent analcime crystals.
Location: Guam. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Analcime Serandite Natrolite

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

Images:

Analcime Behoite

Comments: Gray-white microcline crystals up to 4 cm coated with overgrowth of analcime 18 mm diameter, black aegirine up to 25 mm and most notable, a pale pink behoite.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., Qu?bec, Canada. Scale: 5x4x3 cm.
© John Betts - Fine Minerals

Analcime Crystallography

Axial Ratios:

a:b:c =1.0004:1:1.0001

Cell Dimensions:

a = 13.71, b = 13.7044, c = 13.7063, Z = 16; alpha = 90.158°, beta = 89.569°, gamma = 89.543° V = 2,575.08 Den(Calc)= 2.27

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

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

By Intensity(I/I_o): 3.43(1), 2.925(0.8), 5.61(0.8),

Forms:

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Forms: [ 2 1 1]

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Crystal Structure:

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Mazzi F , Galli E , American Mineralogist , 63 (1978) p.448-460, Is each analcime different?, ANA 1

View Additional jPOWD Structure files for Analcime
[1] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [2] [3] [4] [5] [6] [7] [8] [9]

Physical Properties of Analcime

Cleavage:

[001] Indistinct, [010] Indistinct, [100] Indistinct

Color:

White, Grayish white, Greenish white, Yellowish white, Reddish white.

Density:

2.3

Diaphaniety:

Transparent to Subtransparent to translucent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

5 - Apatite

Luminescence:

Fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Analcime

Gladstone-Dale:

CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2143,KPDmeas= 0.2115,KC= 0.216

Optical Data:

Biaxial (?), a=1.479-1.493, g=1.48-1.494, bire=0.0010

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Analcime

Electron Density:

r_electron=2.27 gm/cc
note: r_Analcime=2.27 gm/cc.

Fermion Index

Fermion Index = 0.01216
Boson Index = 0.98784

Photoelectric:

PE_Analcime= 1.52 barns/electron
U=PE_Analcime x r_electron= 3.45 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Analcime is Not Radioactive

Analcime Classification

Dana Class:

77.1.1.1 (77)Tectosilicate Zeolite group

(77.1)true zeolites

(77.1.1)Analcime and related species

77.1.1.1 Analcime NaAlSi2O6·(H2O) P1 1

77.1.1.2 Pollucite (Cs,Na)2Al2Si4O12·(H2O) I a3d 4/m 3 2/m

77.1.1.3 Wairakite CaAl2Si4O12·2(H2O) I2/a 2/m

77.1.1.4 Laumontite CaAl2Si4O12·4(H2O) C 2/m 2/m

77.1.1.5 Hsianghualite Ca3Li2Be3(SiO4)3F2 I 2₁3 2 3

Strunz Class:

VIII/J.27-10 VIII - Silicates

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

VIII/J.27 - Zeolite group, Analcime - Paulingite series

VIII/J.27-10 Analcime NaAlSi2O6·(H2O) P1 1

VIII/J.27-20 Pollucite (Cs,Na)2Al2Si4O12·(H2O) I a3d 4/m 3 2/m

VIII/J.27-30 Wairakite CaAl2Si4O12·2(H2O) I2/a 2/m

VIII/J.27-40 Faujasite-Na (Na2,Ca,Mg)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

VIII/J.27-44 Faujasite-Mg! (Mg,Na2,Ca)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

VIII/J.27-46 Faujasite-Ca! (Ca,Na2,Mg)3.5[Al7Si17O48]·32(H2O) F d3m 4/m 3 2/m

VIII/J.27-50 Paulingite-K (K2,Ca,Na2,Ba)5Al10Si35O90·45(H2O) Im3m 4/m 3 2/m

VIII/J.27-54 Paulingite-Ca! (Ca,K,Na,Ba)5[Al10Si35O84]·34(H2O) Im3m 4/m 3 2/m

Other Analcime Information

References:

NAME( ODonoghue90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)

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Analcime

NaAlSi2O6·(H2O)
Dana No: 77.1.1.1 Strunz No: VIII/J.27-10
Locality:

Notes: