General Information:
Chemical Formula:
Ca3Si(CO3)(SO4)(OH)6·12(H2O)
Composition:
(Molecular Weight = 1,245.24 gm)
Calcium 19.31 % Ca
Silicon 4.51 % Si
Hydrogen 4.86 % H
Carbon 1.93 % C
Sulfur 5.15 % S
Oxygen 64.24 % O
Empirical Formula:
Ca6Si2(CO3)2(SO4)2(OH)12·24(H2O)
Locality:
Bjelke mine, near Areskutan, Jamtland, Sweden.
Name Origin:
From the Greek thaumasion - "surprising."
Physical Properties:
Cleavage:
[???] Poor
Color:
colorless or white.
Density:
1.88 - 1.9, Average = 1.89
Diaphaniety:
Transparent to translucent
Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Massive - Fibrous - Distinctly fibrous fine-grained forms., Fibrous - Crystals made up of fibe rs.
Hardness:
3.5 - Copper Penny
Luminescence:
None.
Luster:
Vitreous - Silky
Streak:
white
More details...