Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Na$	Sodium	element	1		constituent element	main
	$Al$	Aluminium	element	1		constituent element	main
	$Si$	Silicon	element	2		constituent element	main
	$O$	Oxygen	element	7		constituent element	main
	$H$	Hydrogen	element	2		constituent element	main

Oxides

Formula	$Na_{2}O$	$Al_{2}O_{3}$	$SiO_{2}$	$H_{2}O$
Mass fraction (%)	14.08	23.16	54.58	8.18

Strunz

Class

silicates (09)

Division

tektosilicate with zeolitic H2O (09.G)

Family

Chains of single connected 4-membered rings (09.GB)

Code

09.GB.05

Dana

Major class

silicates (VIII)

Class

tectosilicate zeolite group (77)

Type

true zeolites (77.01)

Group

Analcime and related species (77.01.01)

Code

77.01.01.01

Phase type

crystalline

Crystal system

triclinic

Crystal class

pedial

Crystal class symbol

1 (C1)

Crystal spacegroup

P1

Comments

Can be cubic, tetragonal, orthorhombic or monoclinic depending upon ordering.

Refringence type

biaxial

Refringence sign

negative

Birefringence

0.0010

Refraction index $n_{\alpha}$

1.479-1.493

Refraction index $n_{\gamma}$

1.48-1.494

Pure color

colorless

Color

colorless, White, Grayish white, Greenish white, Yellowish white, Reddish white

Diaphaneity

transparent to translucent

Luster

vitreous

Links

• Wikipedia
• Webmineral database
• Mindat
• Handbook of Mineralogy (Min. Soc. Am)