Base materials with high potential: Difference between revisions
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→Best of the best: added the titanium gemstones |
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* [[moissanite]] - SiC - high heat resistance | * [[moissanite]] - SiC - high heat resistance | ||
* [[stishovite]] and [[seifertite]] - metastable ultrahard and dense SiO<sub>2</sub> polymorphs | * [[stishovite]] and [[seifertite]] - metastable ultrahard and dense SiO<sub>2</sub> polymorphs | ||
* Simple titanium gemstones including: TiN TiP TiC TiSi<sub>2</sub> TiB<sub>2</sub> TiO<sub>2</sub> Ti<sub>2</sub>O<sub>3</sub> | |||
== Simple rutile structure & hard == | == Simple rutile structure & hard == | ||
Revision as of 22:30, 12 April 2021
Best of the best
- diamond and its polymorphs including hexagonal diamond aka lonsdaleite
- moissanite - SiC - high heat resistance
- stishovite and seifertite - metastable ultrahard and dense SiO2 polymorphs
- Simple titanium gemstones including: TiN TiP TiC TiSi2 TiB2 TiO2 Ti2O3
Simple rutile structure & hard
- rutile TiO2
- stishovite - metastable SiO2 polymorph - rutile structure & very hard and dense
- Neo-polymorphs of the above
Simple salt structures
- Periclase
- Some transition metal monoxides
Con: low crystal structure symmetry
- leukosapphire - very hard
- quartz
Con: Rather soft materials
- Calcite and aragonite