Upon this table also are deposited Lord Greenock's sulphuret of cadmium, commonly called greenockite; and sulphurets of nickel.    From Wordnik.com.  [How to See the British Museum in Four Visits] Reference

Nearly the only cadmium mineral known is the sulphide, greenockite, but no deposits of this mineral have been found of sufficient volume to be called cadmium ores.    From Wordnik.com.  [The Economic Aspect of Geology] Reference

Sphalerite almost always contains a little cadmium, probably as the sulphide; and in zinc deposits crystals of sphalerite in cavities are frequently covered with a greenish-yellow film or coating of greenockite.    From Wordnik.com.  [The Economic Aspect of Geology] Reference

2 greenockite.    From Wordnik.com.  [Chapter 6] Reference