<unk>  (or zinc sulphide) is a chemical compound with the formula ZnS.<unk>  is a white- to yellow-colored powder or crystal.  It is  typically encountered in the more stable cubic form, known also as the mineral  sphalerite.  The hexagonal form is also known both as a synthetic material and as the mineral  wurtzite.  Both sphalerite and wurtzite are intrinsic, wide-bandgap semiconductors.  The cubic form has a band gap of 3.54 eV at 300 K whereas the hexagonal form has a band gap of 3.91 eV.
A transition from the sphalerite form to the wurtzite form occurs at around 1293.15 K.  Sphalerite melts at 1991 K.  It has a standard enthalpy of formation of −204.6 kJ mol−1 at 298 K.
Zinc sulfide
Zinc oxide
Zinc chloride
Aluminium hydroxide
Zinc acetate
Lithium peroxide
Silver nitrate
Magnesium peroxide