Isostructural bending - Revision history

Apm: Category:Far term target

2026-03-29T17:11:50Z

← Older revision		Revision as of 19:11, 29 March 2026
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	----		----
	* [[Classifications for gemstone like compounds]] - as it touches on transition between materials with different lattice constants		* [[Classifications for gemstone like compounds]] - as it touches on transition between materials with different lattice constants

			[[Category:Far term target]]

Apm: /* Related */ added back-link to page: Classifications for gemstone like compounds

2025-09-23T05:22:23Z

Related: added back-link to page: Classifications for gemstone like compounds

← Older revision		Revision as of 07:22, 23 September 2025
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	* Bending induced by [[surface passivation]].		* Bending induced by [[surface passivation]].
	* [[Structural type]]		* [[Structural type]]
			----
			* [[Classifications for gemstone like compounds]] - as it touches on transition between materials with different lattice constants

Apm: /* Related */ added link to yet unwritten page Structural type

2017-07-13T19:39:41Z

Related: added link to yet unwritten page Structural type

← Older revision		Revision as of 21:39, 13 July 2017
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	* Bending induced by [[surface passivation]].		* Bending induced by [[surface passivation]].
			* [[Structural type]]

Apm: /* Finding compatible elements */

2017-07-12T13:47:29Z

Finding compatible elements

← Older revision		Revision as of 15:47, 12 July 2017
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	This especially holds for non metals.		This especially holds for non metals.
	In case of the transition metals:		In case of the transition metals:
	* 1) going sidewards is often possible too.<br> Example preserving rutile structure: TiO<sub>2</sub> (rutile), VO<sub>2</sub>, CrO<sub>2</sub>, MnO<sub>2</sub> (pyrolysite)<br>No (IV) oxides for iron and following elements (and scandium preceding titanium).		* 1) going sidewards is often possible too.<br> Example preserving rutile structure: TiO<sub>2</sub> (rutile), VO<sub>2</sub> (no natural mineral present?), CrO<sub>2</sub> (no natural mineral present?), MnO<sub>2</sub> (pyrolysite)<br>No (IV) oxides for iron and following elements (and scandium preceding titanium).
	* 2) the elements of the higher periods get exceedingly rare (main exception is [[zirconium]] Zr -- ZrO<sub>2</sub> baddeleyite) and sometimes pretty toxic (that correlation may not be a coincidence)		* 2) the elements of the higher periods get exceedingly rare (main exception is [[zirconium]] Zr -- ZrO<sub>2</sub> baddeleyite)<br>and sometimes pretty toxic (that correlation may not be a coincidence)

	== Related ==		== Related ==

	* Bending induced by [[surface passivation]].		* Bending induced by [[surface passivation]].

Apm: /* Finding compatible elements */ added missing "("

2017-07-12T13:44:53Z

Finding compatible elements: added missing "("

← Older revision		Revision as of 15:44, 12 July 2017
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	To find compatible elements one can first try go down the group in the periodic table.<br>		To find compatible elements one can first try go down the group in the periodic table.<br>
	Here's an example preserving the rutile structure.		Here's an example preserving the rutile structure.
	We are starting with [[silicon]] and jump over the unstable compound of rutile-structure-CO<sub>2</sub>).		(We are starting with [[silicon]] and jump over the unstable compound of rutile-structure-CO<sub>2</sub>).
	The following sequence is: SiO<sub>2</sub> (stishovite), GeO<sub>2</sub> (argutite), SnO<sub>2</sub> (cerrusite), PbO<sub>2</sub> (plattnerite).		The following sequence is: SiO<sub>2</sub> (stishovite), GeO<sub>2</sub> (argutite), SnO<sub>2</sub> (cerrusite), PbO<sub>2</sub> (plattnerite).

Apm: added section == Finding compatible elements ==

2017-07-12T13:44:04Z

added section == Finding compatible elements ==

← Older revision		Revision as of 15:44, 12 July 2017
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	When there's a [[pseudo phase diagram]] between two different compounds with the same structure-type then in most cases it should be possible to		When there's a [[pseudo phase diagram]] between two different compounds with the same structure-type then in most cases it should be possible to
	do some checkerboard patterning. As a concrete example one can replace [[titanium]] with [[silicon]] in the '''rutile structure type (C4)'''. This is effectively moving around in the '''rutile <=> stishovite [[pseudo phase diagram]]'''. In case of the rutile structure there are a lot of compatible elements thus one can extend the diagram to a triangle, a tetrahedron, a hyper-tetrahedron and so on.		do some checkerboard patterning. As a concrete example one can replace [[titanium]] with [[silicon]] in the '''rutile structure type (C4)'''. This is effectively moving around in the '''rutile <=> stishovite [[pseudo phase diagram]]'''. In case of the rutile structure there are a lot of compatible elements thus one can extend the diagram to a triangle, a tetrahedron, a hyper-tetrahedron and so on.

			== Where to take care ==

	Care must be taken though. Going all the way from a specific structure type like e.g. SiO<sub>2</sub> to the same structure type of CO<sub>2</sub>		Care must be taken though. Going all the way from a specific structure type like e.g. SiO<sub>2</sub> to the same structure type of CO<sub>2</sub>
	one ends up with a compound that is likely an explosive in bulk since CO<sub>2</sub> very much likes to be a molecular gas with strong and low energy C=O double bonds.		one ends up with a compound that is likely an explosive in bulk since CO<sub>2</sub> very much likes to be a molecular gas with strong and low energy C=O double bonds.

			== Finding compatible elements ==

			To find compatible elements one can first try go down the group in the periodic table.<br>
			Here's an example preserving the rutile structure.
			We are starting with [[silicon]] and jump over the unstable compound of rutile-structure-CO<sub>2</sub>).
			The following sequence is: SiO<sub>2</sub> (stishovite), GeO<sub>2</sub> (argutite), SnO<sub>2</sub> (cerrusite), PbO<sub>2</sub> (plattnerite).

			This especially holds for non metals.
			In case of the transition metals:
			* 1) going sidewards is often possible too.<br> Example preserving rutile structure: TiO<sub>2</sub> (rutile), VO<sub>2</sub>, CrO<sub>2</sub>, MnO<sub>2</sub> (pyrolysite)<br>No (IV) oxides for iron and following elements (and scandium preceding titanium).
			* 2) the elements of the higher periods get exceedingly rare (main exception is [[zirconium]] Zr -- ZrO<sub>2</sub> baddeleyite) and sometimes pretty toxic (that correlation may not be a coincidence)

	== Related ==		== Related ==

	* Bending induced by [[surface passivation]].		* Bending induced by [[surface passivation]].

Apm: basic version of the page

2017-07-12T12:22:40Z

basic version of the page

New page

{{Template:site specific term}}
By substituting compatible elements in a crystal structure (a specific structure type to be more concrete) one introduces stresses due to the different diameters of the new atoms. In thin rods and plates that are a only a few atomic layers across these stresses can partially relax by bending (strains).
This can be useful for making cylindrical geometries like axle housings and helical geometries like guiding screws.

== Examples ==

Carbon atoms in diamond or lonsdaleite (== hexagonal diamond) can be replaced with silicon atoms at any ratio.
(In case of a 1:1 ratio one has the gemstone compound called moissanite.)

When there's a [[pseudo phase diagram]] between two different compounds with the same structure-type then in most cases it should be possible to
do some checkerboard patterning. As a concrete example one can replace [[titanium]] with [[silicon]] in the '''rutile structure type (C4)'''. This is effectively moving around in the '''rutile <=> stishovite [[pseudo phase diagram]]'''. In case of the rutile structure there are a lot of compatible elements thus one can extend the diagram to a triangle, a tetrahedron, a hyper-tetrahedron and so on.

Care must be taken though. Going all the way from a specific structure type like e.g. SiO2 to the same structure type of CO2
one ends up with a compound that is likely an explosive in bulk since CO2 very much likes to be a molecular gas with strong and low energy C=O double bonds.

== Related ==

* Bending induced by [[surface passivation]].