from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various shiny minerals composed chiefly of metallic sulfides.
- n. See sphalerite.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A naturally-occurring sulphide of zinc.
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral, called also sphalerite, and by miners mock lead, false galena, and black-jack. It is a zinc sulphide, but often contains some iron. Its color is usually yellow, brown, or black, and its luster resinous.
- n. A general term for some minerals, chiefly metallic sulphides which have a somewhat brilliant but nonmetallic luster.
from The Century Dictionary and Cyclopedia
- n. An ore of zinc; a native sulphid of zinc, but commonly containing more or less iron, also a little cadmium, and sometimes rarer elements (gallium, indium).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an ore that is the chief source of zinc; consists largely of zinc sulfide in crystalline form
It is necessary in this case to calculate the volumes of the galena and of the blende, which is done by dividing the weights by the sp. gravities: thus, 4 divided by 7.5 gives 0.53 and 5 divided by 4 gives
Sphalerite or blende (zinc sulfide), the original zinc ore, smithsonite, hydrozincite, willemite.
If the two brigs covered Killick's land-battery with gunfire, then the Marines could go in with powder barrels, pitch-blende, and Chinese lights to torch the Thuella down to charred ribs.
They were standing at the base of the saddle ridge of pitch-blende, looking down the fold limb.
The most abundant source at present known is the Freiberg blende, 100,000 parts of which only yield from twenty-five to forty parts of indium.
Thus, if galena and zinc blende in acid solutions be connected in the usual manner by a voltaic pair, sulphuretted hydrogen is evolved from the surface of the former, and a current generated which is sufficient to reduce gold, silver or copper from their solutions in coherent electro-plate films.
Iron, copper, and arsenical pyrites, antimony, galena, molybdenite, zinc blende, and wolfram were treated in the above manner with similar results.
Numerous other minerals are at times mistaken for tin, the most common of which are tourmaline or schorl, garnet, wolfram (which is a tungstate of iron with manganese), rutile or titanic acid, blackjack or zinc blende, together with magnetic, titanic, and specular iron in fine grains.
There is not the smallest indication of pitch-blende anywhere in the neighbourhood, and radium, as even those little versed in chemistry or geology are aware, is only to be found in that particular ore.
It is a product of alteration of blende, having been formed from this by the action of carbonated waters; or in many cases the zinc sulphide may have been first oxidized to sulphate, which in solution acted on the surrounding limestone, producing zinc carbonate.