General Information:
Chemical Formula:
(Na,Ca)4[Al3Si9O24]Cl
Composition:
(Molecular Weight = 879.29 gm)
Sodium 5.23 % Na
Calcium 9.12 % Ca
Aluminum 9.21 % Al
Silicon 28.75 % Si
Chlorine 4.03 % Cl
Oxygen 43.67 % O
Empirical Formula:
Na2Ca2Al3Si9O24Cl
IMA Status:
Not IMA Approved
Locality:
Otter Lake, Canada.
Name Origin:
From the Greek skapos - "rod" and lithos - "stone."
Physical Properties:
Cleavage:
[100] Distinct, [110] Distinct
Color:
white, gray, pale brown, pink, or yellow.
Density:
2.56 - 2.77, Average = 2.66
Habits:
Massive - Granular - Common texture observed in granite and other igneous rock., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
Hardness:
6 - Orthoclase
Luminescence:
Fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
More details...