Difference between revisions of "Hematite structure"
From apm
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It's a slightly nontrivial hexagonal crystal structure. | It's a slightly nontrivial hexagonal crystal structure. | ||
| + | == 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> Hematite | + | * 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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| − | More rare elements | + | == More rare elements == |
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* Cr<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Eskolaite eskolaite] - 5.18g/ccm - Mohs 8 - metallic | * Cr<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Eskolaite eskolaite] - 5.18g/ccm - Mohs 8 - metallic | ||
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* V<sub>2</sub>O<sub>3</sub> [http://www.webmineral.com/data/Karelianite.shtml karelianite (webmineral)] - Mohs 8 to 9 - metallic luster | * V<sub>2</sub>O<sub>3</sub> [http://www.webmineral.com/data/Karelianite.shtml karelianite (webmineral)] - Mohs 8 to 9 - metallic luster | ||
| − | --- | + | * Mn<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Bixbyite manganese-bixbyte] - 4.95g/ccm - Mohs 6 to 6.5 |
| − | Way too rare elements: | + | |
| + | == Way too rare elements == | ||
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| + | * Sb<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Antimony_trioxide antimony_trioxide] senarmontite | ||
| + | * Sc<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Kangite kangite] | ||
| + | * Y<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Yttriaite-(Y) Yttriaite-(Y)] | ||
| + | * Bi<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Bismite bismite] [https://en.wikipedia.org/wiki/Bismuth(III)_oxide bismuth(III)_oxide] -- not the monoclinic one | ||
* Tl<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Avicennite avicennite] - 8.9g/ccm - Mohs 2 | * Tl<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Avicennite avicennite] - 8.9g/ccm - Mohs 2 | ||
| + | * Sb<sub>2</sub>O<sub>3</sub> [https://en.wikipedia.org/wiki/Valentinite valentinite] - 5.76g/ccm - Mohs 2.5 to 3 | ||
| − | + | = External links = | |
* Wikipediacategory: [https://en.wikipedia.org/wiki/Category:Hematite_group hematite group aka corundum group] | * Wikipediacategory: [https://en.wikipedia.org/wiki/Category:Hematite_group hematite group aka corundum group] | ||
Revision as of 13:30, 24 April 2021
It's a slightly nontrivial hexagonal crystal structure.
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
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
External links
- Wikipediacategory: hematite group aka corundum group
Corundum structure in 3D:
