free iron

The free iron oxide in loess is one of important climate proxies of the summer monsoon.

黄土中游离氧化铁是指示夏季风的替代性气候指标之一.

In the role of free iron oxide, it is very stable in nature. Adsorbed water is not easy to break away from the red clay and the thickness is several layers of water molecules only.

在游离氧化铁胶结作用下，其性质十分稳定，结合水不容易从红色黏土中脱出，并且其厚度只有几层水分子构成。

The variation of free degree and activation degree show that till can promote the product of free iron oxides and hold back to form crystal iron oxides.

表层铁的游离度和活化度显示开垦促进表层游离铁形成并抑制其向晶质铁转化。

The removal of free iron oxides causes a considerable reduction in specific surface area, especially the external surface area.

红壤胶体的比表面较小，当去除游离氧化铁后，表面积特别是外表面积显著减小。