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2. Moissanite - Wikipedia

   en.wikipedia.org/wiki/Moissanite

   Moissanite (/ ˈmɔɪsəˌnaɪt /) [ 5 ] is naturally occurring silicon carbide and its various crystalline polymorphs. It has the chemical formula SiC and is a rare mineral, discovered by the French chemist Henri Moissan in 1893. Silicon carbide or moissanite is useful for commercial and industrial applications due to its hardness, optical ...

3. Silicon carbide - Wikipedia

   en.wikipedia.org/wiki/Silicon_carbide

   Silicon carbide (SiC), also known as carborundum (/ ˌkɑːrbəˈrʌndəm /), is a hard chemical compound containing silicon and carbon. A wide bandgap semiconductor, it occurs in nature as the extremely rare mineral moissanite, but has been mass-produced as a powder and crystal since 1893 for use as an abrasive.

4. Mohs scale - Wikipedia

   en.wikipedia.org/wiki/Mohs_scale

   Mohs scale. The Mohs scale (/ moʊz / MOHZ) of mineral hardness is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of minerals through the ability of harder material to scratch softer material. The scale was introduced in 1812 by the German geologist and mineralogist Friedrich Mohs, in his book Versuch einer ...

5. Network covalent bonding - Wikipedia

   en.wikipedia.org/wiki/Network_covalent_bonding

   Network covalent bonding. A network solid or covalent network solid (also called atomic crystalline solids or giant covalent structures) [1][2] is a chemical compound (or element) in which the atoms are bonded by covalent bonds in a continuous network extending throughout the material. In a network solid there are no individual molecules, and ...

6. Strength of materials - Wikipedia

   en.wikipedia.org/wiki/Strength_of_materials

   The field of strength of materials (also called mechanics of materials) typically refers to various methods of calculating the stresses and strains in structural members, such as beams, columns, and shafts. The methods employed to predict the response of a structure under loading and its susceptibility to various failure modes takes into ...

7. List of Star Trek materials - Wikipedia

   en.wikipedia.org/wiki/List_of_Star_Trek_materials

   An aluminum windowpane, "of glass-like transparency" was reported from Germany in 1933. [ 1 ] Corundum (Al 2 O 3) is transparent and is widely used in commercial and industrial settings. It has a hardness of 9 Mohs, making it the third hardest mineral after diamond and moissanite. Aluminium oxynitride ( (AlN) x · (Al 2 O 3) 1−x) is a ...