Water reactive gemstones - Revision history

Apm: /* Related */

2026-03-29T20:05:00Z

← Older revision		Revision as of 22:05, 29 March 2026
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	* [[Aluminum]]		* [[Aluminum]]
	* [[Fruit interior analogy]]		* [[Fruit interior analogy]] – see: [[Oxidation]]

Apm: /* Aluminum based water reacting gems */

2025-09-05T08:40:41Z

Aluminum based water reacting gems

← Older revision		Revision as of 10:40, 5 September 2025
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	== Aluminum based water reacting gems ==		== Aluminum based water reacting gems ==

	* Al<sub>4</sub>C<sub>3</sub> evolves methane on contact with water <br>=> aka '''methanide''' (~Mohs8) <br>		* Al<sub>4</sub>C<sub>3</sub> evolves methane CH<sub>4</sub> on contact with water <br>=> aka '''methanide''' (~Mohs8) <br>
	* AlN aluminum nitride evolves ammonia on contact with water <br>=> '''ammonianide''' (name here ad-hoc made up in analogy to the above) zincblende or wurzite structure or stacking mix – Mohs 8-9		* AlN aluminum nitride evolves ammonia NH<sub>3</sub> on contact with water <br>=> '''ammonianide''' (name here ad-hoc made up in analogy to the above) zincblende or wurzite structure or stacking mix – Mohs 8-9

	While these react strongly in form of powders <br>		While these react strongly in form of powders <br>

Apm: /* Calcium bases water reacting compounds */

2025-09-05T08:40:02Z

Calcium bases water reacting compounds

← Older revision		Revision as of 10:40, 5 September 2025
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	Solidified melt microcrystalline aggregates(?) react <br>		Solidified melt microcrystalline aggregates(?) react <br>
	heavily with water as known from carbide lamps. <br>		heavily with water as known from carbide lamps. <br>
	Ethyne aka acetylene gas is evolved. <br>		C<sub>2</sub>H<sub>2</sub> Ethyne aka acetylene gas is evolved. <br>
	Not entirely clear if a dense single crystal would behave the same. <br>		Not entirely clear if a dense single crystal would behave the same. <br>
	especially since calcium hydroxide is not very water soluble. <nr>		especially since calcium hydroxide is not very water soluble. <nr>

Apm: /* Calcium bases water reacting compounds */

2025-09-05T08:39:20Z

Calcium bases water reacting compounds

← Older revision		Revision as of 10:39, 5 September 2025
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	CaC<sub>2</sub> calcium carbide or calcium acetylide <br>		CaC<sub>2</sub> calcium carbide or calcium acetylide <br>
	~~solidified~~ melt microcrystalline aggregates(?) react <br>		Solidified melt microcrystalline aggregates(?) react <br>
	heavily with water as known from carbide lamps.		heavily with water as known from carbide lamps. <br>
			Ethyne aka acetylene gas is evolved. <br>
	Not entirely clear if a dense single crystal would behave the same. <br>		Not entirely clear if a dense single crystal would behave the same. <br>
	especially since calcium hydroxide is not very water soluble. <nr>		especially since calcium hydroxide is not very water soluble. <nr>

Apm: /* Aluminum based water reacting gems */

2025-09-05T08:37:36Z

Aluminum based water reacting gems

← Older revision		Revision as of 10:37, 5 September 2025
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	== Aluminum based water reacting gems ==		== Aluminum based water reacting gems ==

	– Al<sub>4</sub>C<sub>3</sub> evolves methane on contact with water => aka '''methanide''' (~Mohs8)		* Al<sub>4</sub>C<sub>3</sub> evolves methane on contact with water <br>=> aka '''methanide''' (~Mohs8) <br>
	– AlN aluminum nitride evolves ammonia on contact with water => ''ammonianide'' (zincblende or wurzite structure or stacking mix – Mohs 8-9)		* AlN aluminum nitride evolves ammonia on contact with water <br>=> '''ammonianide''' (name here ad-hoc made up in analogy to the above) zincblende or wurzite structure or stacking mix – Mohs 8-9

	While these react strongly in form of powders <br>		While these react strongly in form of powders <br>

Apm: added == Calcium bases water reacting compounds == and extended on the aluminum examples

2025-09-05T08:35:40Z

added == Calcium bases water reacting compounds == and extended on the aluminum examples

← Older revision		Revision as of 10:35, 5 September 2025
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	While these react strongly in form of powders <br>		While these react strongly in form of powders <br>
	this is not the case in the form of bulk crystals as <br>		this is not the case in the form of bulk crystals as is known from handling AlN <br>
	a passivation layer of aluminum hydroxide ~~slows~~ down the reaction. <br>		A passivation layer of aluminum hydroxide might down the reaction. <br>
			Then again aluminum hydroxide is quite water soluble. <br>
	This may be less clear in the aluminum carbide case with <br>		This may be less clear in the aluminum carbide case with <br>
	more volatile methane and no(?) experimental data.		more volatile methane and no(?) experimental data. <br>

	Properly enclosed these gems can also be used in filigree form.		Properly enclosed these gems can also be used in filigree form. <br>
			These should be useful from the hardness perspective and simplicity & symmetry of crystal structure.

	Can be good for intentional degradability, albeit releasing aluminum <br>		Can be good for intentional degradability, albeit releasing aluminum <br>
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	== Calcium bases water reacting compounds ==		== Calcium bases water reacting compounds ==

	~~– CsC~~<sub>2</sub>		CaC<sub>2</sub> calcium carbide or calcium acetylide <br>
			solidified melt microcrystalline aggregates(?) react <br>
			heavily with water as known from carbide lamps.
			Not entirely clear if a dense single crystal would behave the same. <br>
			especially since calcium hydroxide is not very water soluble. <nr>

	== Related ==		== Related ==

Apm: basic page

2025-09-05T08:18:56Z

basic page

New page

{{stub}}

== Aluminum based water reacting gems ==

– Al4C3 evolves methane on contact with water => aka '''methanide''' (~Mohs8)
– AlN aluminum nitride evolves ammonia on contact with water => ''ammonianide'' (zincblende or wurzite structure or stacking mix – Mohs 8-9)

While these react strongly in form of powders 
this is not the case in the form of bulk crystals as 
a passivation layer of aluminum hydroxide slows down the reaction. 
This may be less clear in the aluminum carbide case with 
more volatile methane and no(?) experimental data.

Properly enclosed these gems can also be used in filigree form.

Can be good for intentional degradability, albeit releasing aluminum 
in the form of aluminum hydroxide that eventually making aluminum salts 
is not a typical natural occurrence anc can cause ennvironmental problems 
if released in too high quantity and too short time making fro too high local concentrations 

== Calcium bases water reacting compounds ==

– CsC2

== Related ==

* [[Aluminum]]
* [[Fruit interior analogy]]