General Information:
Chemical Formula:
CdS
Composition:
(Molecular Weight = 144.48 gm)
Cadmium 77.81 % Cd
Sulfur 22.19 % S
Empirical Formula:
CdS
Environment:
Traprock cavities and ore veins.
Locality:
Greenock, Scotland.
Name Origin:
Named after Lord Greenock (Ch. M. Cathcart 1783-1859).
Physical Properties:
Cleavage:
[1120] Distinct, [0001] Imperfect
Color:
honey yellow, citron yellow, or orange yellow.
Density:
3.98 - 5, Average = 4.49
Diaphaniety:
Transparent
Habits:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite), Encrustations - Forms crust-like aggregates on matrix., Colloform - Forming from a gel or coll oidal mass.
Hardness:
3.5-4 - Copper Penny-Flourite
Luminescence:
None.
Luster:
Adamantine - Resinous
Streak:
orange yellow
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