General Information:
Chemical Formula:
(Ca,Na)4Mg3(Fe+++,Fe++,Al)3[(Si,Al)O42](OH)6·n(H2O) (n~11.3)
Composition:
(Molecular Weight = 1,854.54 gm)
Sodium 0.37 % Na
Calcium 8.00 % Ca
Magnesium 3.93 % Mg
Aluminum 6.11 % Al
Iron 8.43 % Fe
Silicon 20.44 % Si
Hydrogen 1.55 % H
Oxygen 51.16 % O
Empirical Formula:
Ca3.7Na0.3Mg3Fe3+1.4Fe2+1.4Al4.2Si13.5O42(OH)6·11.3(H2O)
Environment:
Alteration product in basalts and andesites. Hydrothermal zeolite.
IMA Status:
Approved IMA 1986
Locality:
TL: Spain, Caserras, Aragon and St. Pandelon, Landes, France.
Name Origin:
Named from the Greek root "aer-", alluding to atmosphere or sky and hence the color, sky blue.
Physical Properties:
Color:
blue, blue green, or sky blue.
Density:
2.48
Diaphaniety:
Translucent
Habits:
Fibrous - Crystals made up of fibers., ,
Hardness:
3 - Calcite
Luster:
Vitreous (Glassy)
Streak:
bluish white
More details...