from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A silver-white to gray arsenic ore, essentially FeAsS.
from The Century Dictionary.
- noun A mineral containing arsenic, sulphur, and iron.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A mineral of a tin-white color and metallic luster, containing arsenic, sulphur, and iron; -- also called
arsenical pyritesand mispickel.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A silvery-grey
oreof arsenic, a mixed arsenideand sulfideof iron, FeAsS.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a silver-white or grey ore of arsenic
from Wiktionary, Creative Commons Attribution/Share-Alike License
(As_ S_ ), as oxide (As_ O_ ), and as a constituent of many metallic sulphides, such as arsenopyrite (FeAsS).
The most common arsenic mineral is arsenopyrite, a compound of iron, arsenic, and sulfur.
Equally important is the mineralogical composition of the raw material in primary gold deposits, in which the gold can occur as free gold or bound to pyrite or arsenopyrite as "refractory ore".
Similar to the deleterious metals, element contents which would be worth recovering and marketing in the form of by-products are also often overlooked; for example, zircon sand from alluvial deposits, gold-containing pyrite and arsenopyrite from complex sulphide veins.
Arsenic sulphides, arsenopyrite: hot sublimate is dark, cold varies from yellow to red.
If arsenopyrite is heated in a current of air, what products are formed?
~ The element is prepared by purifying the native arsenic, or by heating the arsenopyrite in iron tubes, out of contact with air, when the reaction expressed by the following equation occurs:
The pyrite has a small amount of arsenopyrite in it, and when this is burned arsenious oxide is formed as
In the latter locality arsenopyrite is found associated with pyrite in a gangue of quartz, forming a series of parallel stringers in gneiss close to a basic dike.
They are rather characteristic of the oxide zones of certain arsenical metallic ores, and are believed in many cases to have formed from arsenopyrite.