1.It`s made from periclasite,magnesite aluminium spinel,chrome ore as raw material.

1.以方镁、镁铝尖晶、铬矿为主晶相的中性耐火制品。

2.The exoplanet's atmosphere condenses out minerals such as enstatite, corundum, spinel, and wollastonite.

2.这颗系的大气冷凝后产生矿物，：顽火辉、刚玉、尖晶和。

3.The development and application of raw minerals and products of spinels are also briefly introduced.

3.尖晶的其它应用，尖晶轴承及颜料等也取得了较大的发展。

4.From all possible members of the spinel groups， hercynite and galaxite， were found to be the most efficient.

4.在所有可能的尖晶矿族成员中，铁铝尖晶和锰铝尖晶被发现是最有效的(添加剂)。