from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A yellow to brown or red mineral, CdS, the only ore of cadmium.
from The Century Dictionary.
- noun Native cadmium sulphid, a rare mineral occurring in hemimorphic hexagonal crystals of a honey-yellow or orange-yellow color, and also as a pulverulent incrustation on sphalerite.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) Native cadmium sulphide, a mineral occurring in yellow hexagonal crystals, also as an earthy incrustation.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A rare
cadmium mineralthat consists of cadmium sulfidein crystallineform.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun ore of cadmium; a rare yellowish mineral consisting of cadmium sulphide in crystalline form
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
Upon this table also are deposited Lord Greenock's sulphuret of cadmium, commonly called greenockite; and sulphurets of nickel.
The best known of these is the mineral greenockite (cadmium sulfide, CdS), but even this mineral forms rare and rather small crystals.
Cadmium sulphide, CdS, occurs naturally as greenockite (_q. v._), and can be artificially prepared by passing sulphuretted hydrogen through acid solutions of soluble cadmium salts, when it is precipitated as a pale yellow amorphous solid.
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.
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.
The zinc oxide minerals in the surficial zone also are sometimes colored yellow by small amounts of greenockite.
Cadmium occurs in nature as cadmium sulphide in greenockite, CdS, which is very rare.