Difference between revisions of "Hematite structure"
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* at www.mindat.org [https://www.mindat.org/min-1136.html] | * at www.mindat.org [https://www.mindat.org/min-1136.html] | ||
* at www.mineralienatlas.de [https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Corundum] | * at www.mineralienatlas.de [https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Corundum] | ||
| − | * http://wwwchem.uwimona.edu.jm/courses/corundum.html | + | * http://wwwchem.uwimona.edu.jm/courses/corundum.html – (good 3D view) |
* corundum group minerals [http://ruby.colorado.edu/~smyth/min/corundum.html] | * corundum group minerals [http://ruby.colorado.edu/~smyth/min/corundum.html] | ||
Revision as of 09:17, 3 June 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:
- at the materials project: [1]
- at www.mindat.org [2]
- at www.mineralienatlas.de [3]
- http://wwwchem.uwimona.edu.jm/courses/corundum.html – (good 3D view)
- corundum group minerals [4]
