If arsenopyrite is heated in a current of air, what products are formed?.    From Wordnik.com.  [An Elementary Study of Chemistry] Reference

The most common arsenic mineral is arsenopyrite, a compound of iron, arsenic, and sulfur.    From Wordnik.com.  [Arsenic] Reference

~ 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.    From Wordnik.com.  [An Elementary Study of Chemistry] Reference

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".    From Wordnik.com.  [Chapter 6] Reference

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.    From Wordnik.com.  [Chapter 6] Reference

Traces of arsenopyrite and pyrrhotite have also been recognised.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

The main feature is a sulfide zone composed primarily of galena with some pyrite and arsenopyrite.    From Wordnik.com.  [The Earth Times Online Newspaper] Reference

Mineralization is associated with pyrite and arsenopyrite within silicified breccia and shear zones.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

Sphalerite, chalcopyrite and galena occur in varying amounts with pyrrhotite, pyrite and arsenopyrite.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

The other system, located about 50 metres to the southwest, has a similar mineralogy to the first, but is arsenopyrite-bearing.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

Astral's 2007-08 drilling at JJ Main prospect revealed arsenopyrite to be intimately associated with strong gold mineralisation.    From Wordnik.com.  [StreetInsider.com News Articles] Reference

The showings are in strongly altered felsic dykes and sills containing coarse to fine sulphides including pyrite and arsenopyrite.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

The gold is refractory and occurs dominantly in finely disseminated arsenopyrite within the stock-work veins and altered wall-rocks.    From Wordnik.com.  [The Earth Times Online Newspaper] Reference

The main sulphide minerals are pyrite, arsenopyrite and pyrrhotite, while accessory minerals include bismuthinite, scheelite and sphalerite.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

Native GOLD in dacitic to rhyodacitic metavolcanic rocks and graphitic schists, associated with native antimony, minor arsenopyrite and pyrrhotite.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

They are rather characteristic of the oxide zones of certain arsenical metallic ores, and are believed in many cases to have formed from arsenopyrite.    From Wordnik.com.  [The Economic Aspect of Geology] Reference

The known mineralized zones typically exhibit strong silica and carbonate (with sericite) alteration accompanied by disseminated pyrite, arsenopyrite and rare base metals.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

Mineralization consists of quartz-albite-calcite veining with disseminated pyrite, pyrrhotite and arsenopyrite hosted in pervasively silicified, brecciated siltstone and wacke.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

The middle horizon, or discovery horizon, contains the majority of the significant gold intervals and has the highest concentrations of arsenopyrite, bismuthinite and scheelite.    From Wordnik.com.  [Marketwire - Breaking News Releases] Reference

The former deposits contain arsenopyrite and copper-bearing pyrite impregnating a mica-quartz-schist, adjacent to and in apparent genetic relation with aplite or pegmatite intrusives.    From Wordnik.com.  [The Economic Aspect of Geology] Reference

The gold-bearing intervals occur within sedimentary rocks associated with disseminated arsenopyrite and aluminous rock alteration similar to that observed at the Roberto Gold Deposit.    From Wordnik.com.  [News] Reference

In the Terrace Creek system with high gold grades, insufficient arsenopyrite is formed to encapsulate the gold and hence discrete gold grains have formed in and around the pyrite crystals.    From Wordnik.com.  [Latest News - Yahoo!7 News] Reference

Mineralization on the Beattie-Donchester properties consists mostly of tabular, subvertical zones of finely disseminated pyrite-gold and variable arsenopyrite in brecciated or sheared, potassic-altered syenite porphyry.    From Wordnik.com.  [Marketwire - Breaking News Releases]

The Duport gold deposit is characterized by two main laterally persistent silicified shear zones referred to as the Main and East (Footwall) zones that contain stringer and disseminated pyrite, pyrrhotite and arsenopyrite.    From Wordnik.com.  [Marketwire - Breaking News Releases]

The alteration mineral assemblage included pervasive sericite, biotite and pyrite; locally, there are minor amounts of sphalerite, chalcopyrite, galena and arsenopyrite in late veins that cross cut the early synvolcanic alteration.    From Wordnik.com.  [StreetInsider.com News Articles] Reference

(e.g. pyrite, arsenopyrite, etc.) from oxidic concentrates (e.g. tin ore.    From Wordnik.com.  [14.1 Jig screen, hand-jigging] Reference

4.9 -- 5.3 arsenopyrite.    From Wordnik.com.  [Chapter 6] Reference

Moderately or weakly magnetic substances: arsenopyrite, chromite, hematite, ilmenite, limonite, manganite, wolframite, rhodochrosite, garnet, amphiboles and pyroxenes.    From Wordnik.com.  [1.1 Blow pipe assaying] Reference