Neo-polymorph - Revision history

Apm: Category:Far term target

2026-03-29T17:10:19Z

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	* [https://www.mineralienatlas.de/ www.mineralienatlas.de] <br>lists minerals with equal or similar structures for any given mineral <br> so thhis can serve as a possible starting point to find potential neo-polymorphs		* [https://www.mineralienatlas.de/ www.mineralienatlas.de] <br>lists minerals with equal or similar structures for any given mineral <br> so thhis can serve as a possible starting point to find potential neo-polymorphs

			[[Category:Far term target]]

Apm: /* Examples */

2025-09-26T10:13:07Z

Examples

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	* genrally: cubic zincblende structure to hexagonal wurzite structure series (for all applicable compounds respectively, mostly III-V semiconductors)		* genrally: cubic zincblende structure to hexagonal wurzite structure series (for all applicable compounds respectively, mostly III-V semiconductors)
	----		----
			Other patternd back and forth transitions between small chunks of highly compatible crystal structures:
	* [[withe sapphire]] to [[deltalumide]] (unclear if transitionable)		* [[withe sapphire]] to [[deltalumide]] (unclear if transitionable)
	* [[silicon nitride]] trigonal alpha to hexagonal beta & (unclear) to cubic gamma		* [[silicon nitride]] trigonal alpha to hexagonal beta & (unclear) to cubic gamma

Apm: /* Examples */ added a few examples

2025-09-26T10:11:55Z

Examples: added a few examples

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	See: [[pseudo phase diagrams]] for more details on this.		See: [[pseudo phase diagrams]] for more details on this.

			* [[Dialondeite]] cubic to hexagonal series
			* [[Moissanite]] cubic to hexagonal series
			* genrally: cubic zincblende structure to hexagonal wurzite structure series (for all applicable compounds respectively, mostly III-V semiconductors)
			----
			* [[withe sapphire]] to [[deltalumide]] (unclear if transitionable)
			* [[silicon nitride]] trigonal alpha to hexagonal beta & (unclear) to cubic gamma
			* SiO<sub>2</sub> low pressure modification transitions - see page: [[Quartz]]
			* … {{wikitodo\|Find more examples to put here}}

	== Related ==		== Related ==

Apm: /* Related */

2025-09-26T10:04:22Z

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	== Related ==		== Related ==

	* [[~~neo~~-gems]]		* [[Neo-gems]]
	* '''[[Neo-isotypes]]'''		* '''[[Neo-isotypes]]'''
	----		----

Apm: /* Related */

2025-09-26T10:04:11Z

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	== Related ==		== Related ==

	* '''[[Neo-isotypes]]'''		* [[neo-gems]]
			* '''[[Neo-isotypes]]'''
	----		----
	* [[Classifications for gemstone like compounds]]		* [[Classifications for gemstone like compounds]]

Apm: moved over section to new page neo-isotypes

2025-09-26T10:03:32Z

moved over section to new page neo-isotypes

@@ Line 1: / Line 1: @@
-{{wikitodo|There is a significant mixup with '''neo-isotypes''' here. Move relevant parts to the new page.}}
+{{wikitodo|There was a significant mixup with '''neo-isotypes''' here. Do some more cleanup & checks if transition succeeded.}}
 {{site specific term}}
@@ Line 54: / Line 54: @@
 '''Examples:'''
 * [[Dialondeite]]
 == External links ==

Apm: fixex of intor to better fit the new classification approach

2025-09-26T10:00:42Z

fixex of intor to better fit the new classification approach

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	* changes of atom types and stoichometry falls under [[neo-isotypes]] instead: <br>specific example: A crossover gemstone between Rutile (polymorph of TiO<sub>2</sub>) and stishovite (polymorph of SiO<sub>2</sub>). <br>The pattern making elements are Ti & Si. Oxygen atoms stay at their places.		* changes of atom types and stoichometry falls under [[neo-isotypes]] instead: <br>specific example: A crossover gemstone between Rutile (polymorph of TiO<sub>2</sub>) and stishovite (polymorph of SiO<sub>2</sub>). <br>The pattern making elements are Ti & Si. Oxygen atoms stay at their places.

	~~Patterns~~:		Stacking order patterns:
	* ABABBABBBBAABABAABAA – unwanted unordered state – may be the only one that is thermodynamically accessible		* ABABBABBBBAABABAABAA – unwanted unordered state – may be the only one that is thermodynamically accessible
	* ABABABABABABABABABAB – unwanted ordered state – may be the only one that is thermodynamically accessible		* ABABABABABABABABABAB – unwanted ordered state – may be the only one that is thermodynamically accessible
	* ABBAABBAABBAABBAABB – '''neo-polymorph''' – wanted peculiarly ordered state – not thermodynamically accessible - but accessible via [[mechanosynthesis]]		* ABBAABBAABBAABBAABB – '''neo-polymorph''' – wanted peculiarly ordered state – not thermodynamically accessible - but accessible via [[mechanosynthesis]]
			Note: in the case of SiC ([[moissanite]]) there is the constraint of no two same letters following adjacently. Above examples for simplicity.

	~~Of course arbitrary many elements/layertypes/~~... ~~are allowed. A,B,C,D,..~~.		Also '''[[neo-polymorphs]] and [[neo-isotypes]] can intermix here to [[neo gemstones like compounds]]''' or '''neo-gems''' for short. <br>
			All sorts of II-IV semiconductor compounds have fitting structure stacking order variations in {111} directions. <br>
			So structural stacking order can be augmented with material type stacking order. <br>
			Material stacking order not being constrained to the by {111} directions but by lattice strain. <br>

	Note: '''Thermodynamic accessibility''' refers to all the crude processes available today (~~2020~~) that only allow to handle matter in statistical quantities: melting, mixing, cooling, pressurizing, irradiating, ([[cook mix and stir thermodynamic synthesis]]) ... This explicitly excludes advanced [[mechanosynthesis]].		Note: '''Thermodynamic accessibility''' refers to all the crude processes available today (2025) <br>
			that only allow to handle matter in statistical quantities: <br<
	~~{{wikitodo\| ABABAB ABCABC - no same letters following adjacently in case of SiC structure - fix discussion above accordingly eventually}}~~		melting, mixing, cooling, pressurizing, irradiating, ([[cook mix and stir thermodynamic synthesis]]) ... <br>
			This explicitly excludes advanced [[mechanosynthesis]].

	== Examples ==		== Examples ==

Apm at 09:45, 26 September 2025

2025-09-26T09:45:30Z

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	* changes between different crystal structures of the same composition (adn stoichometry) so long nigh seamless covalent transitions are possible		* changes between different crystal structures of the same composition (adn stoichometry) so long nigh seamless covalent transitions are possible
	Excluded here:		Excluded here:
	* ~~different~~ atom types ~~(elements) fall~~ under [[neo-isotypes]] instead: <br>specific example: A crossover gemstone between Rutile (polymorph of TiO<sub>2</sub>) and stishovite (polymorph of SiO<sub>2</sub>). <br>The pattern making elements are Ti & Si. Oxygen atoms stay at their places.		* changes of atom types and stoichometry falls under [[neo-isotypes]] instead: <br>specific example: A crossover gemstone between Rutile (polymorph of TiO<sub>2</sub>) and stishovite (polymorph of SiO<sub>2</sub>). <br>The pattern making elements are Ti & Si. Oxygen atoms stay at their places.

	Patterns:		Patterns:

Apm at 09:44, 26 September 2025

2025-09-26T09:44:26Z

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	{{site specific term}}		{{site specific term}}

	A '''neo-polymorphic compound''' (or neo-isomorphic compound) is a highly (meta)stable non equilibrium polymorph of a material with a certain fixed stoichiometry that is exclusively accessible through [[mechanosynthesis]]. If just one element is involved the term '''neo-allotrope''' can be applied instead.		A '''neo-polymorphic compound''' (or neo-isomorphic compound) is a highly (meta)stable non equilibrium polymorph <br>
			of a material with a certain fixed stoichiometry that is exclusively accessible through [[mechanosynthesis]]. <br>
			If just one element is involved the term '''[[neo-allotrope]]''' can be applied too/instead.

	This includes patterns where specifically ordered states are thermodynamically not more attractive than disordered (or in other undesired form ordered) states but where a (sufficiently) high activation energy lies between the ordered and unordered states.		This includes patterns where specifically ordered states are thermodynamically not more attractive <br>
			than disordered (or in other undesired form ordered) states but <br>
			where a (sufficiently) high activation energy lies between the ordered and unordered states <br>
			making the via conventional means inacessible states highly kinetically metastable. <br>

	The patterns can be:		The patterns can be:
	* different stacking geometry ~~or ...~~ <br>~~specific example:~~ A crossover between Diamond (cubic stacking) and lonsdaleite (hexagonal stacking). <br>(When pointing up a tetrapod of carbon bonds there are two ways one can orient the up facing three bonds in a six direction hexagon).		* different stacking geometry, specific example: <br>A crossover between Diamond (cubic stacking) and lonsdaleite (hexagonal stacking). <br>(When pointing up a tetrapod of carbon bonds there are two ways one can orient the up facing three bonds in a six direction hexagon).
	* changes between different crystal structures of the same composition (adn stoichometry) so long nigh seamless covalent transitions are possible		* changes between different crystal structures of the same composition (adn stoichometry) so long nigh seamless covalent transitions are possible
	Excluded here:		Excluded here:

Apm at 09:39, 26 September 2025

2025-09-26T09:39:27Z

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	The patterns can be:		The patterns can be:
	* different stacking geometry or ... specific example: A crossover between Diamond (cubic stacking) and lonsdaleite (hexagonal stacking). (When pointing up a tetrapod of carbon bonds there are two ways one can orient the up facing three bonds in a six direction hexagon).		* different stacking geometry or ... <br>specific example: A crossover between Diamond (cubic stacking) and lonsdaleite (hexagonal stacking). <br>(When pointing up a tetrapod of carbon bonds there are two ways one can orient the up facing three bonds in a six direction hexagon).
	* changes between different crystal structures of the same composition (adn stoichometry) so long nigh seamless covalent transitions are possible		* changes between different crystal structures of the same composition (adn stoichometry) so long nigh seamless covalent transitions are possible
	Excluded here:		Excluded here:
	* different atom types (elements) fall under [[neo-isotypes]] instead: <br>specific example: A crossover gemstone between Rutile (polymorph of TiO<sub>2</sub>) and stishovite (polymorph of SiO<sub>2</sub>). The pattern making elements are Ti & Si. Oxygen atoms stay at their places.		* different atom types (elements) fall under [[neo-isotypes]] instead: <br>specific example: A crossover gemstone between Rutile (polymorph of TiO<sub>2</sub>) and stishovite (polymorph of SiO<sub>2</sub>). <br>The pattern making elements are Ti & Si. Oxygen atoms stay at their places.

	Patterns:		Patterns: