GEOLOGY

Detailed explanation-1: -Sulfide minerals are the source of various precious metals, most notably gold, silver, and platinum. They also are the ore minerals of most metals used by industry, as for example antimony, bismuth, copper, lead, nickel, and zinc.

Detailed explanation-2: -Sulfide (British English also sulphide) is an inorganic anion of sulfur with the chemical formula S2− or a compound containing one or more S2− ions. Solutions of sulfide salts are corrosive.

Detailed explanation-3: -Metal sulfides are a major group of minerals that provide the crystal chemist a rich field for investigation due to their diverse structural types. They are abundant and cheap since they usually exist in nature as minerals such as heazlewoodite (Ni3S2), chalcocite (Cu2S), pyrite (FeS2) and so on.

Detailed explanation-4: -Sulfur belongs to the third period and 16 th group that is the Oxygen family(chalcogens family). It is a poor conductor of heat and electricity because the electrons are not free to move. Sulfur is not lustrous and It reacts with oxygen to form sulfur dioxide that is acidic in nature, hence it is non-metal.

Detailed explanation-5: -Structure of sulfides (Each SiS4 tetrahedron consists of a central silicon atom surrounded by and bonded to four sulfur atoms.)