Difference between revisions of "Hematite structure"
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== Highly abundant elements == | == Highly abundant elements == | ||
| − | * Al<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Aluminium_oxide Aluminium(III)_oxide] - [https://en.wikipedia.org/wiki/Sapphire leukosapphire] - (Sapphire and Ruby are colored variants) - 2,072°C - 3.987g/ccm - Mohs 9 (defining compound) | + | * '''Al<sub>2</sub>O<sub>3</sub>''' [https://en.wikipedia.org/wiki/Aluminium_oxide Aluminium(III)_oxide] - [https://en.wikipedia.org/wiki/Sapphire leukosapphire] - (Sapphire and Ruby are colored variants) - 2,072°C - 3.987g/ccm - Mohs 9 (defining compound) |
| − | * Ti<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Titanium(III)_oxide Titanium(III)_oxide] - [https://en.wikipedia.org/wiki/Tistarite tristarite] - 2,130°C (decomposes) - 4.49g/ccm - '''metallic luster - semiconducting to metallic at 200°C''' - Mohs 8.5 | + | * '''Ti<sub>2</sub>O<sub>3</sub>''' [https://en.wikipedia.org/wiki/Titanium(III)_oxide Titanium(III)_oxide] - [https://en.wikipedia.org/wiki/Tistarite tristarite] - 2,130°C (decomposes) - 4.49g/ccm - '''metallic luster - semiconducting to metallic at 200°C''' - Mohs 8.5 |
* Fe<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Iron(III)_oxide iron(III)_oxide] [https://en.wikipedia.org/wiki/Hematite Hematite] - 5.3g/ccm - Mohs 5.5 to 6.5 | * Fe<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Iron(III)_oxide iron(III)_oxide] [https://en.wikipedia.org/wiki/Hematite Hematite] - 5.3g/ccm - Mohs 5.5 to 6.5 | ||
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Revision as of 12:46, 24 April 2021
Also: Hematite group / Corundum group.
It's a slightly nontrivial hexagonal crystal structure.
Contents
Highly abundant elements
- Al2O3 Aluminium(III)_oxide - leukosapphire - (Sapphire and Ruby are colored variants) - 2,072°C - 3.987g/ccm - Mohs 9 (defining compound)
- Ti2O3 Titanium(III)_oxide - tristarite - 2,130°C (decomposes) - 4.49g/ccm - metallic luster - semiconducting to metallic at 200°C - Mohs 8.5
- Fe2O3 iron(III)_oxide Hematite - 5.3g/ccm - Mohs 5.5 to 6.5
- FeTiO3 Ilmenite - 4.72g/ccm - Mohs 5.5
- MgTiO3 Geikielite - 4.4g/ccm - Mohs 5
- MnTiO3 Pyrophanite - 4.75g/ccm - Mohs 5 to 6
More rare elements
- Cr2O3 eskolaite - 5.18g/ccm - Mohs 8 - metallic
- V2O3 karelianite (webmineral) - Mohs 8 to 9 - metallic luster
- Mn2O3 manganese-bixbyte - 4.95g/ccm - Mohs 6 to 6.5
Way too rare elements
- Sb2O3 antimony_trioxide senarmontite
- Sc2O3 kangite
- Y2O3 Yttriaite-(Y)
- Bi2O3 bismite bismuth(III)_oxide -- not the monoclinic one
- Tl2O3 avicennite - 8.9g/ccm - Mohs 2
- Sb2O3 valentinite - 5.76g/ccm - Mohs 2.5 to 3
Related
External links
- Wikipediacategory: hematite group aka corundum group
Corundum structure in 3D:
