How to memorize three-phase reaction terms.

[nakamura25]

So I'm always having troubles with memorizing the three-phase reaction terms, such as eutectic, eutectoid, peritectic and peritectoid. Are there any meanings of the prefix and suffix? Are there any tricks to memorizing the names and meanings (reactions) of these terms?

Thanks a lot!

 

[Comic JK]

Eutectic means easy (eu) to melt (tēkō), ie the minimum melting temperature of a mixture of A and B, which the eutectic point defines.

Eutectoid means 'like easy-melting' (think metal and metalloid). The transition is between different phases of solid, not solid and liquid, but is otherwise the same.

Peri means 'around' (think perimeter, the around-measure), so peritectic means 'around melting.' It's not quite melting, since you don't have solid -> liquid, but you can think of it as around melting, since you have solid -> solid+liquid.

 

[nakamura25]

Eutectic means easy (eu) to melt (tēkō), ie the minimum melting temperature of a mixture of A and B, which the eutectic point defines.

Eutectoid means 'like easy-melting' (think metal and metalloid). The transition is between different phases of solid, not solid and liquid, but is otherwise the same.

Peri means 'around' (think perimeter, the around-measure), so peritectic means 'around melting.' It's not quite melting, since you don't have solid -> liquid, but you can think of it as around melting, since you have solid -> solid+liquid.

This really helps! Thank you so much, JK!