论文部分内容阅读
一金的赋存状态及矿物1.金的赋存状态金具有镧系收缩性,其外层电子受核的吸引牢固,电子云结构紧密,电离势较大(第一电离势达9.2ev),不易成离子,与其他元素的化学亲和力很微弱,化学性质十分稳定,属惰性元素.因此,自然界中金的离子化合物很少,而多呈金属状态存在.金与银、铜及铂族元素等的原子半径相近,常与之形成金属互化物.特别是金与银的原子半径相同(1.44?),晶格常数也相近(Au是4.070?,Ag是4.078?),同处于A.E.费尔斯曼元素地球化学表中硫化场或亲硫场的第一纵列,化学性质相
A deposit of gold and minerals 1. The presence of gold Gold lanthanide shrinkage, the outer electron by the core to attract a solid electron cloud structure close, the ionization potential is large (the first ionization potential of 9.2ev) , Is not easy to form ions, chemical affinity with other elements is very weak, very stable chemical properties, is an inert element, therefore, the natural gold ions are rare, but mostly in the presence of metals, gold and silver, copper and platinum group elements And other atomic radius similar, often with the formation of intermetallics, especially the same atomic radius of gold and silver (1.44?), The lattice constant is also similar (Au is 4.070 ?, Ag is 4.078?), The same in AE Fair The first column of the Sulfidation or Sulfidation field in the Schman elemental geochemistry table shows the chemical phase