Difference between revisions of "Zincblende structure"
From apm
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* grey [[tin]] ([[oddball compounds|odd]]) | * grey [[tin]] ([[oddball compounds|odd]]) | ||
----- | ----- | ||
| − | * ZnS [https://en.wikipedia.org/wiki/Sphalerite zinc sphalerite] - 4.2g/ccm . Mohs 3.5 to 4 (soft) | + | * ZnSe [https://en.wikipedia.org/wiki/Zinc_selenide Zinc_selenide] [https://en.wikipedia.org/wiki/Stilleite stilleite] - 5.42g/ccm - Mohs 5 - (Se is rare) |
| + | * '''α-ZnS''' [https://en.wikipedia.org/wiki/Sphalerite zinc sphalerite] - 4.2g/ccm . Mohs 3.5 to 4 (soft) | ||
| + | * CdS [https://en.wikipedia.org/wiki/Cadmium_sulfide cadmium_sulfide] | ||
| + | |||
| + | == Pseudo phase diagrams surrounding SiC == | ||
| + | |||
| + | All the carbon group elmenets can be substitutes. <br> | ||
| + | The heavier ones likely only within bounds. <br> | ||
| + | Like e.g. Lead carbide (biggest and smallest atoms of the group) is not achievable via thermodynamic means. <br> | ||
| + | And it's unclear if even via [mechanosynthesis|mechanosynthetic]] means. | ||
| + | |||
| + | == Rift between pseudo phase diagrams == | ||
| + | |||
| + | SiC and ZnS have the same structure but there seems to be an unbridgable rift for [[pseudo phase diagram]]s. <br> | ||
| + | With other nonmetals sulfur usually assumes bond order two (like oxygen above) but in ZnS it assumes bond order four. | ||
| + | |||
| + | == Pseudo phase diagrams surrounding ZnS == | ||
| + | |||
| + | Investigating the [[pseudo phase diagram]]s that emanate from ZnS | ||
| + | |||
| + | * CS<sub>2</sub> is an ([[oddball compound|odd]]) liquid. | ||
| + | * SiS<sub>2</sub> is an ([[oddball compound|odd]]) polymeric compound. | ||
| + | * Zinc carbide ??? | ||
| + | * Zinc silicide ??? | ||
| + | |||
| + | '''Replacing sulfur:''' <br> | ||
| + | * Replacing all sulfur with oxygen (above S) likely not work since ZnO (zncite) is hexagonal.<br> | ||
| + | * Replacing all sulfur with selenium (below S) works. thhis gives ZnSe Zinc_selenide (mineral stilleite) | ||
| + | '''Replacing Zinc:''' <br> | ||
| + | Below Zinc there is cadmium and mercury both rare and toxic. <br> | ||
| + | * CdS [https://en.wikipedia.org/wiki/Cadmium_sulfide cadmium_sulfide] has zinkblende structure => all [[psuedo polymorphs]] possible | ||
| + | * α-HgS [https://en.wikipedia.org/wiki/Cinnabar cinnabarite] wants to be trigonal rather than cubic | ||
= Misc = | = Misc = | ||
Revision as of 13:38, 24 April 2021
- SiC moissanite
- ZnSe Zinc_selenide stilleite - 5.42g/ccm - Mohs 5 - (Se is rare)
- α-ZnS zinc sphalerite - 4.2g/ccm . Mohs 3.5 to 4 (soft)
- CdS cadmium_sulfide
Contents
Pseudo phase diagrams surrounding SiC
All the carbon group elmenets can be substitutes.
The heavier ones likely only within bounds.
Like e.g. Lead carbide (biggest and smallest atoms of the group) is not achievable via thermodynamic means.
And it's unclear if even via [mechanosynthesis|mechanosynthetic]] means.
Rift between pseudo phase diagrams
SiC and ZnS have the same structure but there seems to be an unbridgable rift for pseudo phase diagrams.
With other nonmetals sulfur usually assumes bond order two (like oxygen above) but in ZnS it assumes bond order four.
Pseudo phase diagrams surrounding ZnS
Investigating the pseudo phase diagrams that emanate from ZnS
Replacing sulfur:
- Replacing all sulfur with oxygen (above S) likely not work since ZnO (zncite) is hexagonal.
- Replacing all sulfur with selenium (below S) works. thhis gives ZnSe Zinc_selenide (mineral stilleite)
Replacing Zinc:
Below Zinc there is cadmium and mercury both rare and toxic.
- CdS cadmium_sulfide has zinkblende structure => all psuedo polymorphs possible
- α-HgS cinnabarite wants to be trigonal rather than cubic
Misc
Also a very simple but different (odd) cubic structure: Cu2O cuprite.
