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

Revision as of 23:28, 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 – compadred to pyrite: less chemically stable, smaller unit cell, lower crystal structure symmetry
• FeSe₂ Ferroselite – Mohs 6.0-6.5 – Fe substitutable by Ni (Kullerudit), Cu (Petříčekit)
• FeTe₂ Frohbergit – Fe substitutable by Co (Mattagamit)

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

• Spinel_group

• A15 phases – (are there some that do not contain super rare elements?)
• => Weaire–Phelan structure
• Weaire–Phelan building blocks by mechadense
• A15 coordinates