Corundum - Wikipedia
Corundum is a crystalline form of aluminium oxide (Al2O3) typically containing traces of iron, titanium, vanadium, and chromium. [3][4] It is a rock -forming mineral. It is a naturally …
Corundum | Aluminum Oxide, Gemstone, Abrasive | Britannica
2024年10月15日 · corundum, naturally occurring aluminum oxide mineral (Al 2 O 3) that is, after diamond, the hardest known natural substance. Its finer varieties are the gemstones sapphire …
Corundum | Properties, Formation, Uses » Geology Science
2024年7月1日 · Corundum is a mineral that is primarily composed of aluminum oxide (Al2O3) and is one of the naturally occurring crystalline forms of aluminum oxide. It is a very hard mineral …
Corundum: Use as a Gemstone, Abrasive, Refractory - Geology.com
Corundum is a rock-forming mineral that is found in igneous, metamorphic, and sedimentary rocks. It is an aluminum oxide with a chemical composition of Al 2 O 3 and a member of the …
Aluminium oxide - Wikipedia
Corundum is the most common naturally occurring crystalline form of aluminium oxide. [8] Rubies and sapphires are gem-quality forms of corundum, which owe their characteristic colours to …
Aluminum Oxide - Chemistry LibreTexts
2023年6月30日 · Corundum is the most common naturally occurring crystalline form of aluminum oxide. Rubies and sapphires are gem-quality forms of corundum, which owe their …
Corundum - Minerals Education Coalition
Corundum is a crystalline form of aluminum oxide (Al2O3) with traces of iron, titanium and chromium. It is a rock-forming mineral. It is one of the naturally transparent materials, but can …
Aluminas - Chemistry LibreTexts
2023年6月30日 · There are a few forms of aluminum oxide, and corundum being the most common. The structure of corundum can be viewed as a hexagonal close packed array of …
Corundum – Virtual Museum of Molecules and Minerals
Corundum is an aluminum oxide mineral of the oxides and hydroxides group, with structural formula Al2O3. The structure consists essentially of a dense arrangement of oxygen ions in …
Corundum - New World Encyclopedia
Corundum is a crystalline form of aluminum oxide and a rock -forming mineral. It is naturally clear but can have different colors when impurities are present. It is superior in hardness and …