Coal, containing all the elements that are present in nature and more than 200 minerals, has
a complex chemical structure, making it one of the most complex geological materials …

The material classed as “mineral matter” in coal embraces crystalline mineral materials as
well as a range of inorganic elements that occur in non-crystalline form. This review outlines …

Growing public awareness of the environmental impact of coal combustion has raised
serious concerns about the various hazardous trace elements produced by coal firing …

Rare metals in coal deposits have attracted much attention in recent years because of their
potential economic significance. This paper reports the abundance and enrichment origin of …

The petrological, geochemical, and mineralogical compositions of the coal-hosted Jurassic
uranium ore deposit in the Yili Basin of Xinjiang province, northwestern China, were …

The Early Cretaceous Wulantuga high-Ge coal deposit in Inner Mongolia is one of the major
coal-hosted Ge deposits in China. This paper reports new data on the petrological …

Altered volcanic ash with highly-elevated concentrations of Nb (Ta), Zr (Hf), Ga, and rare
earth elements and yttrium (REY) is an untraditional type of critical metal deposit that has …

Three-dimensional porous silicon particles can be produced via the combination of a
galvanic displacement reaction and a metal-assisted chemical etching process. This simple …

The widespread presence of trace elements is shown by reviewing their roles during the
mining, beneficiation and combustion of coal and during metal mining and treatments …

The review presented covers:(a) historical introduction;(b) some analytical comments;(c)
some peculiarities of the As geochemistry in environment;(d) an estimation of coal Clarke …