Mineral phase
IMA name
Chabazite-Ca
Class
silicate mineral
Compound type
tektosilicate
Formula
(Na2,K2,Ca,Sr)(Al2Si4O12)6(H2O)
Chemical formula
(Na2,K2,Ca,Sr)(Al2Si4O12)•6(H2O)
Elemental formula
(Na)0-0.5 (Ca)0.5-1 (K)0-0.5 (Sr)0-0.5 Al2 Si4 O18 H8
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
Na Sodium element 0 - 0.5 constituent element main
Ca Calcium element 0.5 - 1 constituent element main
K Potassium element 0 - 0.5 constituent element main
Sr Strontium element 0 - 0.5 constituent element main
Al Aluminium element 2 constituent element main
Si Silicon element 4 constituent element main
O Oxygen element 18 constituent element main
H Hydrogen element 8 constituent element main
Composition comments
Ca must be the dominant species between K and Na. Sr and Mg are occasionally. Other impurity: Fe
Oxides
Formula Na2O K2O SrO CaO MgO Al2O3 SiO2 H2O
Mass fraction (%)

Strunz

Class
silicates (09)
Division
tektosilicate with zeolitic H2O (09.G)
Family
Chains of 6-membered rings – tabular zeolites (09.GD)
Code
09.GD.10

Dana

Major class
silicates (VIII)
Class
tectosilicate zeolite group (77)
Type
true zeolites (77.01)
Group
Chabazite and related species (77.01.02)
Code
77.01.02.01
Phase type
crystalline
Crystal system
triclinic
Crystal class
pinacoidal
Crystal class symbol
-1 (Ci)
Crystal spacegroup
P-1
Molar mass
519.54 g/mol
Density
2.05 - 2.15 g/cm3
State NTP
solid
Refringence type
biaxial
Refringence sign
positive or negative
Birefringence
0.0020-0.0050
Refraction index nα
1.478-1.485
Refraction index nβ
1.48-1.4895
Refraction index nγ
1.48-1.49
Pure color
colorless
Color
Colorless, Green, Yellow, White, Pink
Diaphaneity
transparent to translucent
Luster
vitreous