Difference between revisions of "Base materials with high potential"
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* [[garnets]] - hard and cubic (but big unit cell) | * [[garnets]] - hard and cubic (but big unit cell) | ||
| − | * Brommelite BeO - very hard but beryllium is scarce and poisonous | + | * [[Brommelite]] BeO - very hard but beryllium is scarce and poisonous |
Revision as of 22:54, 12 April 2021
Very good materials
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 with rutile structure
Simple salt structures
- periclase MgO
- some transition metal monoxides (TiO, FeO, NiO, ..)
Other
- spinell MgAl2O4 - very hard and cubic
Materials with some weakness
Con: low crystal structure symmetry
- leukosapphire - very hard
- quartz - and other low density polymorphs of SiO2
Con: Rather soft materials
- calcite and aragonite
Others
- garnets - hard and cubic (but big unit cell)
- Brommelite BeO - very hard but beryllium is scarce and poisonous
