Manganese sulfide

Description

Manganese(II) sulfide, MnS, occurs in nature as the mineral alabandite (isometric), rambergite (hexagonal), and the recently found browneite (isometric, with sphalerite-type, ZnS, structure, extremely rare and is only known from a meteorite). Manganese(II) sulfide can be formed through the reaction of a manganese(II) salt (such as manganese(II) chloride) with ammonium sulfide.

Chemical properties

pink, green, or brownish green powder(s); three crystal(s) forms: α: green cub; β: red cub; γ: red hexagonal; used as an additive in steel production [HAW93] [MER06]

Physical properties

Habit: massive or granular.
Color: Brownish black to black, tarnish upon exposure to moist air.
Luster: submetallic.
Diaphaneity: opaque.
Cleavage: (110) perfect.
Fracture: uneven.
Streak: green.
Occurrence: epithermal sulfide vein deposits.

The Uses of Manganese sulfide

Additive in steel making.

The Uses of Manganese sulfide

it is used as an intermediate in chemical research& pharmaceutical research.

General Description

MnS can exist in three polymorphs; α,β,γ, of these, the α phase is most thermodynamically stable.

Flammability and Explosibility

Not classified

Structure and conformation

The crystal structure of manganese(II) sulfide is comparable to that of sodium chloride. The pink color of MnS is probably caused by poor coupling between the lowest energy unoccupied Mn orbitals, resulting in discrete states rather than a delocalized band. Consequently, the lowest energy band-to-band electronic transition requires very high-energy (ultraviolet) photons.