Difference between revisions of "Base materials with high potential"
From apm
(low density SiO<sub>2</sub> polymorphs) |
(→Simple rutile structure & hard: added link to yet unwritten page: rutile structure) |
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* [[rutile]] TiO<sub>2</sub> | * [[rutile]] TiO<sub>2</sub> | ||
| − | * [[stishovite]] - metastable SiO<sub>2</sub> polymorph - rutile structure & very hard and dense | + | * [[stishovite]] - metastable SiO<sub>2</sub> polymorph - [[rutile structure]] & very hard and dense |
* [[neo-polymorph]]s of the above | * [[neo-polymorph]]s of the above | ||
Revision as of 22:44, 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 - and other low density polymorphs of SiO2
Con: Rather soft materials
- calcite and aragonite
