from The American Heritage® Dictionary of the English Language, 4th Edition
- n. See arsenopyrite.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The mineral arsenopyrite
from the GNU version of the Collaborative International Dictionary of English
- n. Arsenical iron pyrites; arsenopyrite.
from The Century Dictionary and Cyclopedia
- n. Same as arsenopyrite.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a silver-white or grey ore of arsenic
The underlying slate is filled with bunches of mispickel, not distributed in a sheet, or in any particular order, so far as yet observed, but developed throughout the slate, and varying in size from that of small nuts to many pounds in weight, masses of over fifty pounds having been frequently taken out.
The minerals associated with the quartz in this vein, especially the cuprite and mispickel, are found most abundantly upon the foot-wall side, or underside of the quartz itself.
All the miners are agreed in the statement that the gold abounds most at the swells, or highest points of the waves of rock, and that the scarcely less valuable mispickel appears to follow the same law.
The gold is also often visible to the naked eye in all the associated minerals, and particularly in the mispickel and blende.
Iron is found combined with sulphur in pyrrhotine and pyrites, and together with arsenic in mispickel.
~ -- In assaying ores containing a large proportion of pyrites or mispickel, or both, the best plan is to take a portion and calcine so as to convert it into a product of the kind just considered.
The chief source of the arsenic of commerce is arsenical pyrites, or mispickel, which contains about 45 per cent. of arsenic (As).
A sample of mispickel contains 7 per cent. cobalt.
With mispickel, and those substances which easily give off arsenic on heating, the substance is first treated with nitric acid, evaporated to dryness, and then the residue is treated in the way just described.
Sulphur in blende, 375 in burnt ore, 377 in chalcocite, 376 in coal, 419 in copper, 207 in copper pyrites, 376 in mispickel, 376 in pyrites, 370, 376