A crystalline element or a solid in

A crystalline element or a solid inorganic chemical compound formed by a geological
process is a mineral and therefore receives a specific name. Natural crystalline aluminum oxide or
alumina (α-Al2O3) is named corundum, the monocrystals are colorless and transparent. If they
contain, intimately mixed, microcrystal of magnetite (Fe304) or hematite (Fe203), they are called emery.
If the corundum monocrystals contain some elements in isomorphic substitution for Al3+ in their
structure, gemstones and semi-precious gemstones are formed, also receiving specific names for
their colors: (a) blue sapphire - blue (Fe, Ti); (b) ruby – red (Cr); (c) yellow sapphire - yellow (Fe3+,
Fe2+); (d) purple sapphire - purple (Fe, Mn, Ti); (e) green sapphire – green (Fe2+)[1-4].
In natural, color and clarity of sapphires are not popular for market. Generally, the quality of
sapphires may be improved by various processes, one of which is by the thermal process [5].
The purpose of this research is to investigate the effects of heat treatment on crystal structures of
corundum.

Results (English) 3:

由地质过程形成的晶体元素或固体无机化合物，是一种矿物，因此得到一个特定的名称。自然结晶氧化铝或氧化铝（Al2O3
α）命名的单晶刚玉是无色透明的。如果他们
包含，紧密混合，微晶磁铁矿（Fe3O4）、赤铁矿（Fe2O3），他们被称为金刚砂。
如果刚玉单晶包含一些元素同构取代Al3
结构，宝石和半宝石的形成，同时接收特定名称
颜色：（一）蓝色蓝宝石-蓝（Fe，Ti）；（B）红宝石–红（CR）；（c）黄色蓝宝石-黄（Fe3，Fe~（2+）；（D）紫色蓝宝石-紫色（Fe，Mn，Ti）；（e）绿色蓝宝石–绿色（Fe2）[ 1-4 ]。
自然，色彩和清晰度的蓝宝石不是受欢迎的市场。通常，
蓝宝石质量可以通过各种方法提高，其中之一是通过热过程
[ 5 ]。本研究的目的是探讨热处理对
刚玉晶体结构的影响。