General Information:
Chemical Formula:
BaAl2Si3O10·4(H2O)
Composition:
(Molecular Weight = 507.60 gm)
Barium 27.05 % Ba
Aluminum 10.63 % Al
Silicon 16.60 % Si
Hydrogen 1.59 % H
Oxygen 44.13 % O
Empirical Formula:
BaAl2Si3O10·4(H2O)
IMA Status:
Approved IMA
Locality:
Kilpatrick Hills, near Glasgow, Dumbarton, Scotland.
Name Origin:
Named after the discoverer of the mineral, Edington from Glasgow, Scotland.
Physical Properties:
Cleavage:
[110] Perfect
Color:
brownish gray, colorless, gray, white, or pink.
Density:
2.69 - 2.7, Average = 2.69
Diaphaniety:
Transparent to translucent
Habits:
Pseudo Tetragonal - Crystals show a tetragonal shape., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Massive - Uniformly indistinguishable crystals forming large masses.
Hardness:
4-5 - Fluorite-Apatite
Luster:
Vitreous (Glassy)
Streak:
white
More details...