2000年9月1日 · In the Earth's crust PGM usually occur in native form associated with one or more of the other PGM along with gold, iron, copper and chromium. The composition of their natural alloys shows a considerable degree of variation and the alloys often form more or less continuous series in which no sharp boundaries exist between the various minerals [9] .

The paper includes some new analyses of inclusions from ancient goldwork, a survey of Old World platinum group metal sources and discusses whether or not early people were aware of the platinum group metals.

The article contains sections titled: 1. History 2. Properties 3. Occurrence 3.1. Abundance 3.2. Ores and Their Origin 3.3. Primary Deposits 3.4. Secondary Deposits 3.5. Recovery...

1999年6月1日 · A large amount of research has been conducted on methods for accurate determinations of traces of platinum group elements (PGEs) and gold (Au) contained in a variety of sample types or matrices. PGEs comprise a group of six elements, namely platinum (Pt), palladium (Pd), rhodium (Rh), iridium (Ir), ruthenium, (Ru) and osmium (Os).

2013年7月14日 · Platinum is also found as a native platinum-iridium alloy and as the mineral cooperite, which is a platinum sulphide. Osmium and iridium occur as an iridium-osmium alloy, with their proportions varying widely between the two end members. The alloy also contains trace amounts of other platinum group metals.

2000年9月1日 · Details of the occurrence of the platinum group metals (PGM) in the Earth's crust and the composition of the principal minerals are presented along with data on supply and demand of PGM in...

2004年9月1日 · Different platinum-group element deposits or ores should be treated with different recovery methods according to their mineralogical features and other factors. The following briefly discusses several different ores: those amenable to gravity separation, those amenable to flotation, and those where platinum-group elements are by-products of ...

2020年10月30日 · Native platinum is isostructural with all copper group elements (Au, Ag, Cu) and of course with other platinum group elements (Pd, Ir, Os, Rh) - but not with iron. The small amounts of iridium (Ir), osmium (Os) and rhodium (Rh) are common impurities in the native platinum, less common are gold (Au), nickel (Ni) and copper (Cu) impurities.

2024年8月3日 · Platinum-group elements (PGE) are most effectively concentrated via sulfide-silicate melt immiscibility; however, under sulfide-undersaturated conditions, PGE may exhibit highly siderophile behavior and occur as native metals and alloys.

Platinum group elements (PGEs) play a decisive role in the performance of exhaust systems, worldwide applied in vehicles and in some household utensils, to reduce the emission of gaseous pollutants, such as carbon monoxide, nitrogen oxides,