General Information:
Chemical Formula:
NaCa16Si23AlO60(OH)8·64(H2O)
Composition:
(Molecular Weight = 3,586.19 gm)
Sodium 0.64 % Na
Calcium 17.88 % Ca
Aluminum 0.75 % Al
Silicon 18.01 % Si
Hydrogen 3.82 % H
Oxygen 58.89 % O
Empirical Formula:
NaCa16Si23AlO60(OH)8·64(H2O)
Environment:
Secondary mineral from the alteration of basalts. Pegmatite dike intruding limestone.
Locality:
Isle of Skye, Scotland. Crestmore, Riverside Co., California, USA.
Physical Properties:
Cleavage:
[???] Perfect
Color:
brown, colorless, yellow, white, or light green.
Density:
2.45 - 2.51, Average = 2.48
Diaphaniety:
Transparent to translucent
Habits:
Platy - Sheet forms (e.g. micas)., Lamellar - Thin laminae producing a lamellar structure., Compact - Occurs as a compact mass.
Hardness:
2.5 - Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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