Difference between revisions of "Simple crystal structures of especial interest"
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'''Marcasite structure: (ortorhombic with simple unit cell)''' | '''Marcasite structure: (ortorhombic with simple unit cell)''' | ||
| − | * '''FeS<sub>2</sub> [https://en.wikipedia.org/wiki/Marcasite Marcasite]''' – Mohs 6.0-6.5 – compadred to pyrite: less chemically stable, smaller unit cell, lower crystal structure symmetry | + | * '''FeS<sub>2</sub> [https://en.wikipedia.org/wiki/Marcasite Marcasite]''' – Mohs 6.0-6.5 – 4.88g/ccm – compadred to pyrite: less chemically stable, smaller unit cell, lower crystal structure symmetry |
| − | * FeSe<sub>2</sub> [https://en.wikipedia.org/wiki/Ferroselite Ferroselite] – Mohs 6.0-6.5 – Fe substitutable by Ni (Kullerudit), Cu (Petříčekit) | + | * FeSe<sub>2</sub> [https://en.wikipedia.org/wiki/Ferroselite Ferroselite] – Mohs 6.0-6.5 – 7.2g/ccm – Fe substitutable by Ni (Kullerudit), Cu (Petříčekit) |
* <small>FeTe<sub>2</sub> Frohbergit – Fe substitutable by Co (Mattagamit)</small> – – <small>FePo<sub>2</sub> ?? (highly radioactive)</small> | * <small>FeTe<sub>2</sub> Frohbergit – Fe substitutable by Co (Mattagamit)</small> – – <small>FePo<sub>2</sub> ?? (highly radioactive)</small> | ||
Marcasite structure (other group): | Marcasite structure (other group): | ||
Revision as of 22:35, 27 June 2021
- Zincblende structure - zincblende ZnS, cubic moissanite SiC, diamond CC, silicon, gernamium, (α-tin aka grey tin SnSn), ...
- Wurtzite structure - wurtzite ZnS, hexagonal moissanie SiC, lonsdaleite CC (hexagonal diamond), ... (same as above)
- Rutile structure - Rutile TiO2, Stishovite SiO2, ...
- Corundum structure - Leukosapphire Al2O3, Tistarite Ti2O3,
- Rock salt structure - (NaCl) - See: Transition metal monoxides
- Quartz structure
- Pyrite structure
Marcasite structure: (ortorhombic with simple unit cell)
- FeS2 Marcasite – Mohs 6.0-6.5 – 4.88g/ccm – compadred to pyrite: less chemically stable, smaller unit cell, lower crystal structure symmetry
- FeSe2 Ferroselite – Mohs 6.0-6.5 – 7.2g/ccm – Fe substitutable by Ni (Kullerudit), Cu (Petříčekit)
- FeTe2 Frohbergit – Fe substitutable by Co (Mattagamit) – – FePo2 ?? (highly radioactive)
Marcasite structure (other group):
- FeP2 Zuktamururite – Mohs ??
- FeAs2 Loellingite – Mohs 5.0-5.5 – 7.1-7.5g/ccm
- FeSb2 (materialsproject)
- (FeBi2 – cannot be produced via thermodynamic means it seems – highly immiscible when molten – [1])
- Rammelsbergite (NiAs2) – has two polymorps: (Krutovit cubic) (Pararammelsbergit – orthorhombic)
- Safflorit (CoAs2), Omeiite (OsAs2), Anduoite (RuAs2)
- Nisbit (NiSb2)
Side-notes
The 3D voroni cells around the atoms can be used to gain sets of space-filling
polyhedral shapes for polyhedral microcomponents on a much larger scale.
(It's not Wiegner Seiz cells, this would bbe arround lattice points rather than atoms)
Related
- Gemstone-like compounds
- Neo-polymorph
- Pseudo phase diagram
- Good websites about compounds and minerals
External links
Wikipedia:
- Strukturbericht_designation
- Category:Crystal_structure_types
- Zincblende structure
- Wurtzite crystal structure
- A15 phases – (are there some that do not contain super rare elements?)
- => Weaire–Phelan structure
- Weaire–Phelan building blocks by mechadense
- A15 coordinates
