Difference between revisions of "Simple crystal structures of especial interest"

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m (Cubic but very big unit cell)
 
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* [[Zincblende structure]] - zincblende ZnS, cubic moissanite SiC, diamond CC, silicon, gernamium, (α-tin aka grey tin SnSn), ...
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* [[Zincblende structure]] - zincblende ZnS, '''cubic moissanite SiC''', diamond CC, silicon, gernamium, (α-tin aka grey tin SnSn), BN, AlN, ...
* [[Wurtzite structure]] - wurtzite ZnS, hexagonal moissanie SiC, lonsdaleite CC (hexagonal diamond), ... (same as above)  
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* [[Wurtzite structure]] - wurtzite ZnS, '''hexagonal moissanie SiC''', lonsdaleite CC (hexagonal diamond), ... (same as above)  
 
* See: [[Diamond like compounds]]
 
* See: [[Diamond like compounds]]
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* [[Rutile structure]] - Rutile TiO<sub>2</sub>, [[Stishovite]] SiO<sub>2</sub>, ...
 
* [[Corundum structure]] - [[Leukosapphire]] Al<sub>2</sub>O<sub>3</sub>, Tistarite Ti<sub>2</sub>O<sub>3</sub>,
 
* [[Rock salt structure]] - (NaCl) - See: [[Transition metal monoxides]]
 
* [[Quartz structure]]
 
* [[Pyrite structure]]
 
 
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'''Marcasite structure: (ortorhombic with simple unit cell)'''
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* [[Rock salt structure]] – simple cubic – (NaCl rocksalt, '''MgO periclase''', TiO hongquiite, FeO wüstite, NiO bunsenite, ...) - See: [[Transition metal monoxides]]
* '''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
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* [[Rutile structure]] – (tetragnal with simple unit cell) '''Rutile TiO<sub>2</sub>, [[Stishovite]] SiO<sub>2</sub>''', ...
* 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)
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* [[Hematite structure]] – (hexahonal) – '''[[Leukosapphire]] Al<sub>2</sub>O<sub>3</sub>, Tistarite Ti<sub>2</sub>O<sub>3</sub>''', and Hematite Fe<sub>2</sub>O<sub>3</sub>
* <small>FeTe<sub>2</sub> Frohbergit – Fe substitutable by Co (Mattagamit)</small> – – <small>FePo<sub>2</sub> ?? (highly radioactive)</small>
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* [[Marcasite structure]] – (ortorhombic with simple unit cell) – '''FeS<sub>2</sub> [https://en.wikipedia.org/wiki/Marcasite Marcasite]''' and  '''FeP<sub>2</sub> Zuktamururite'''
Marcasite structure (other group):
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* [[Perovskite structure]] (cubic or ortorhombic near cubic – simple unit cell) – '''CaTiO<sub>3</sub> [https://en.wikipedia.org/wiki/Perovskite Perovskite]'''
* '''FeP<sub>2</sub> Zuktamururite''' – Mohs ??
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* [https://en.wikipedia.org/wiki/A15_phases A15_phases] – (cubic simple unit cell) (also known as '''β-W''' or '''Cr<sub>3</sub>Si''' structure types) – quite covalent intermetallic compounds Cr<sub>3</sub>Si, (Nb<sub>3</sub>Sn superconductor) – Are there any compounds in this group that do not contain scarce elements? <br> Related: [https://en.wikipedia.org/wiki/Weaire%E2%80%93Phelan_structure Weaire–Phelan structure] [https://www.thingiverse.com/thing:2390586 (3D printable tiles)]
* FeAs<sub>2</sub> [https://en.wikipedia.org/wiki/Loellingite Loellingite] – Mohs 5.0-5.5 – 7.1-7.5g/ccm
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* FeSb<sub>2</sub> [https://materialsproject.org/materials/mp-20714/ (materialsproject)]
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* [[Pyrite structure]] – '''FeS<sub>2</sub> pyrite''', '''NiS<sub>2</sub> vaesite''', MnS<sub>2</sub> hauerite
* <small>(FeBi<sub>2</sub> – cannot be produced via [[thermodynamic means]] it seems – highly immiscible when molten – [https://pubs.acs.org/doi/10.1021/acscentsci.6b00287])</small>
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* [[Quartz structure]]
* Rammelsbergite (NiAs2) – has two polymorps: (Krutovit cubic) (Pararammelsbergit – orthorhombic)
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* Safflorit (CoAs2), <small>Omeiite (OsAs2), Anduoite (RuAs2)</small>
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== Cubic but very big unit cell ==
* Nisbit (NiSb2)
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* Spinel structure – [https://www.mineralienatlas.de/lexikon/index.php/MineralData?lang=en&language=english&mineral=Spinel 3D structure (mineralienatlas)]
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* Garnet structure [https://www.mineralienatlas.de/lexikon/index.php/MineralData?lang=en&language=english&mineral=Garnet 3D structure (mineralienatlas)]
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* Bixbyte structure – [https://www.mineralienatlas.de/lexikon/index.php/MineralData?lang=en&language=english&mineral=Bixbyit 3D structure (mineralienatlas)]
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Special cases (related to [[concrete]] and [https://en.wikipedia.org/wiki/Calcium_aluminates calcium aluminates]):
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* Compound: [https://en.wikipedia.org/wiki/Dodecacalcium_hepta-aluminate Dodecacalcium_hepta-aluminate]
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* Mineral: [https://en.wikipedia.org/wiki/Chlormayenite Chlormayenite]
  
 
== Side-notes ==
 
== Side-notes ==
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== Related ==
 
== Related ==
  
* [[Gemstone-like compounds]]
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* [[Structural type]]
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* '''[[Base materials with high potential]]'''
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* [[Gemstone-like compound]]s
 
* [[Neo-polymorph]]
 
* [[Neo-polymorph]]
 
* [[Pseudo phase diagram]]
 
* [[Pseudo phase diagram]]
* [[Good websites about compounds and minerals]]
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* '''[[Good websites about compounds and minerals]]'''
  
 
== External links ==
 
== External links ==
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* [https://www.thingiverse.com/thing:2390586 Weaire–Phelan building blocks] by mechadense
 
* [https://www.thingiverse.com/thing:2390586 Weaire–Phelan building blocks] by mechadense
 
* [https://www.atomic-scale-physics.de/lattice/struk/a15.html A15 coordinates]
 
* [https://www.atomic-scale-physics.de/lattice/struk/a15.html A15 coordinates]
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* [https://en.wikipedia.org/wiki/List_of_space_groups List of space groups] (230)

Latest revision as of 16:29, 4 July 2021

This article is a stub. It needs to be expanded.


Cubic but very big unit cell

Special cases (related to concrete and calcium aluminates):

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

External links

Wikipedia: