全部

1·Tourmaline is a kind of gem material with complex structure, composition and isomorphous substitution, which resuslt in diverse types and colors of this gem.

辐照处理是碧玺颜色改善很重要的一种方法。

2·The results show that isomorphous substitution occur in the diamonds and the vibrational spectra characteristics of the diamonds depend on the substitution of different elements.

结果表明，在天然金刚石中存在类质同象置换现象，其振动光谱特征随置换元素的不同而不同。

3·The results showed that Fe atoms embed the framework of FeAPO-5 molecular sieve by isomorphous substitution and the crystallinity of FeAPO-5 molecular sieve exhibited good and grains were uniform.

结果表明，铁原子通过同晶取代方式进入分子筛骨架，结晶度高，晶粒均匀。