IUPAC Name: Sulfanylidenenickel
Empirical Formula: NiS
Molecular Weight: 90.7584 g/mol
Color: Brass yellow
Structure of Millerite (CAS NO.1314-04-1):
                 

IARC Cancer Review: Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 49 ,1990,p. 257.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) .

Confirmed carcinogen. When heated to decomposition Millerite (CAS NO.1314-04-1) emits acrid smoke and irritating vapors.

 Millerite , its cas register number is 1314-04-1. It also can be called Nickel sulfide crystalline particles  ; Nickel sulfide ; and Nickel sulphide . It often forming radiating masses and furry aggregates, and general lack of association with pyrite or pyrrhotite. It forms an important ore constituent of the Silver Swan, Cliffs, Wannaway, Mt Keith (MKD5), Yakabindie and Honeymoon Well orebodies. Millerite (CAS NO.1314-04-1) is found as a metamorphic replacement of pentlandite within the Silver Swan nickel deposit, generally as a replacement of metamorphosed pentlandite. Millerite is considered a transitional stage in the metamorphic production of heazlewoodite via the above process.