General Information:
Chemical Formula:
(Ca,Na2,K2)Al2Si10O24·7(H2O)
Composition:
(Molecular Weight = 874.36 gm)
Potassium 0.22 % K
Sodium 0.39 % Na
Calcium 2.75 % Ca
Aluminum 6.17 % Al
Silicon 32.12 % Si
Hydrogen 1.61 % H
Oxygen 56.73 % O
Empirical Formula:
Ca0.6Na0.15K0.05Al2Si10O24·7(H2O)
Environment:
Cavities in andesitic rocks.
IMA Status:
Approved IMA
Locality:
Green and Table mountains, Jefferson Co., Colorado, USA.
Name Origin:
Named after its locality in Morden, Canada.
Physical Properties:
Cleavage:
[010] Perfect
Color:
colorless, white, yellowish, or pinkish.
Density:
2.1 - 2.15, Average = 2.12
Diaphaniety:
Transparent to translucent
Habits:
Blocky - Crystal shape tends to be equant (e.g. feldspars)., Striated - Parallel lines on crystal surface or cleavage face., Reniform - "Kidney like" in shape (e.g.. hematite).
Hardness:
5 - Apatite
Luminescence:
None.
Luster:
Vitreous - Silky
Streak:
white
More details...