corundum

1.include capacitance mullite, capacitance zircon mullite, capacitance magnesia-alumina spinel, capacitance zircon corundum,diamantane, and corundum-mullite products.

体系。产品有电熔莫来石、电熔锆莫来石、电熔镁铝尖晶石、电熔锆刚、白刚、刚-莫来石制品等。

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

这颗系外行星的大气冷凝后产生矿物，如：顽火辉石、刚、尖晶石和硅灰石。

3., On the Mohs hardness scale, zoisite and hornblende (or tschermakite) have hardnesses about about 6½, whereas corundum has a hardness of 9.

比如，黝帘石和角闪石（或者钙镁闪石）的摩氏硬度为6.5，而刚则达到9。