Catapleiite

General Information:
 Chemical Formula:
(Na,Ca,[ ])2ZrSi3O9·2(H2O)
 Composition:
(Molecular Weight = 414.57 gm)
Sodium 5.55 % Na
Calcium 8.70 % Ca
Zirconium 22.00 % Zr
Silicon 20.32 % Si
Hydrogen 0.97 % H 
Oxygen 42.45 % O 
 Empirical Formula:
NaCa0.9ZrSi3O9·2(H2O)
 Locality:
Laven Island, Langesundfjord area, and Bratthagen, Norway.
 Name Origin:
Named from the Greek for "wholly' and "full", because it is allways accompanied by a number of rare minerals.
Physical Properties:
 Cleavage:
[110] Perfect, [010] Perfect
 Color:
blue, brown, colorless, yellow, or yellow brown.
 Density:
2.75
 Diaphaniety:
Transparent to translucent
 Habits:
Platy - Sheet forms (e.g. micas)., Pseudo Hexagonal - Crystals show a hexagonal outline.,
 Hardness:
6 - Orthoclase
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
white
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