General Information:
Chemical Formula:
Ca7Si6(CO3)O18·2(H2O)
Composition:
(Molecular Weight = 833.09 gm)
Calcium 33.68 % Ca
Silicon 20.23 % Si
Hydrogen 0.48 % H
Carbon 1.44 % C
Oxygen 44.17 % O
Empirical Formula:
Ca7Si6(CO3)O18·2(H2O)
Environment:
Rare constituant of hybrid rocks formed by the assimilation of limestone by dolerite.
Locality:
Scawt Hill, Antrim, Ireland.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
[001] Perfect, [010] Poor
Color:
colorless.
Density:
2.77
Diaphaniety:
Transparent
Habits:
Platy - Sheet forms (e.g. micas)., ,
Hardness:
4-5 - Fluorite-Apatite
Luster:
Vitreous (Glassy)
Streak:
white
More details...