General Information:
Chemical Formula:
(NH4)2Ca(SO4)2·(H2O)
Composition:
(Molecular Weight = 286.30 gm)
Calcium 14.00 % Ca
Hydrogen 3.52 % H
Sulfur 22.40 % S
Nitrogen 9.78 % N
Oxygen 50.30 % O
Empirical Formula:
(NH4)2Ca(SO4)2·(H2O)
Environment:
Waste heaps of a lignite mine. Pseudomorphous after gypsum.
Locality:
Zeravice, near Kyjov in southeastern Moravia, Czech Republic.
Name Origin:
Named for Jaroslav Kokta (1904-1970), Czech chemist, who analyzed the artificial compound.
Physical Properties:
Cleavage:
None
Color:
colorless or white.
Density:
2.09
Diaphaniety:
Transparent
Habits:
Acicular - Occurs as needle-like crystals., Fibrous - Crystals made up of fibers., Water Soluble - Water soluble mineral.
Streak:
white
More details...