Tistarite: Difference between revisions
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fixed the stoichometry info |
harness comparison to rutile |
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Maybe via checkerboard patterning during [[piezomechanosynthesis]] a transition is possible giving some [[Neo-polymorph]] series. | Maybe via checkerboard patterning during [[piezomechanosynthesis]] a transition is possible giving some [[Neo-polymorph]] series. | ||
Same elements as rutile TiO<sub>2</sub> but different stoichometry. | Same elements as rutile/anatase/brookite TiO<sub>2</sub> but different stoichometry. | ||
* Pro: Titanium is common in earths crust (and in space) | * Pro: Titanium is common in earths crust (and in space) | ||
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* Formula: Ti<sub>2</sub>O<sub>3</sub> | * Formula: Ti<sub>2</sub>O<sub>3</sub> | ||
* Hardness Mohs 8.5 | * Hardness Mohs 8.5 (quite a bit harder than [[rutile]] which has: Mohs 6.0 to 6.5) | ||
* Crystal system: Trigonal (the same as [[sapphire]] but different unit cell) | * Crystal system: Trigonal (the same as [[sapphire]] but different unit cell) | ||
* Density ~4.53g/ccm | * Density ~4.53g/ccm | ||
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Titanium is in a unusual trivalent form here <br> | Titanium is in a unusual trivalent form here <br> | ||
(as in grossmanite a titanium chain silicate). | (as in grossmanite a titanium chain silicate). | ||
== Isostructural gems ([[Hematite structure]]) == | |||
* [[White sapphire]] Al<sub>2</sub>O<sub>3</sub> | |||
* [[Hematite]] Fe<sub>2</sub>O<sub>3</sub> | |||
See: [[Simple crystal structures of especial interest]] | |||
== Related == | == Related == | ||
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* Escolaite Cr<sub>2</sub>O<sub>3</sub> – Mohs 8.0-8.5 – '''Cr is not too abundant''' – optically metallic black? | * Escolaite Cr<sub>2</sub>O<sub>3</sub> – Mohs 8.0-8.5 – '''Cr is not too abundant''' – optically metallic black? | ||
* Karelianite V<sub>2</sub>O<sub>3</sub> – Mohs 8-9 – '''V is not too abundant''' – optically metallic | * Karelianite V<sub>2</sub>O<sub>3</sub> – Mohs 8-9 – '''V is not too abundant''' – optically metallic | ||
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* [[Deltalumite]] … an aluminum oxide with oxospinel structure instead of the typical sapphire/corundum/[[hematite structure]] (unusual). | |||
== External links == | == External links == | ||
Latest revision as of 19:48, 27 November 2025
A form titanium oxide with stoichometry Ti2O3 that is isostructural to leukosapphire Al2O3.
Maybe via checkerboard patterning during piezomechanosynthesis a transition is possible giving some Neo-polymorph series.
Same elements as rutile/anatase/brookite TiO2 but different stoichometry.
- Pro: Titanium is common in earths crust (and in space)
- Pro: Hardness is high
- Pro: Crystal structure is simple
- Con? unit cell is a bit big
Overall a good base material for gemstone metamaterial technology for large scale construction.
- Formula: Ti2O3
- Hardness Mohs 8.5 (quite a bit harder than rutile which has: Mohs 6.0 to 6.5)
- Crystal system: Trigonal (the same as sapphire but different unit cell)
- Density ~4.53g/ccm
- Refractive index: ?? – likely quite high
Misc trivia:
Titanium is in a unusual trivalent form here
(as in grossmanite a titanium chain silicate).
Isostructural gems (Hematite structure)
- White sapphire Al2O3
- Hematite Fe2O3
See: Simple crystal structures of especial interest
Related
Other polymorphs of same formula:
Isostructural gems:
- Leukosapphire (gem grade corundum) Fe2O3 – Mohs 9 (defining mineral) – optically transparent
- Hematite Fe2O3 – Mohs 5-6 (rather soft in comparison) – optically metallic
- Escolaite Cr2O3 – Mohs 8.0-8.5 – Cr is not too abundant – optically metallic black?
- Karelianite V2O3 – Mohs 8-9 – V is not too abundant – optically metallic
- Deltalumite … an aluminum oxide with oxospinel structure instead of the typical sapphire/corundum/hematite structure (unusual).