# Tag Info

1 vote

### What's the relation between two symmetry groups, if one has all the symmetry of the other and some more?

As the discussion of these issues in the comments has gotten rather extensive, I think that I should move it to an answer. In math, it's common to use the word "symmetry" to refer to an ...
Accepted

### What's the relation between two symmetry groups, if one has all the symmetry of the other and some more?

What mathematical term describes the relationship between $C_s$ and $C_{2v}$? Is $C_{2v}$ a subgroup of $C_s$? Is it rather a subset of it? Should we rather say that $C_{2v}$ implies $C_s$? \$C_\...
• 69.6k

### Looking for terminology for when a hygroscopic chemical gets moisture in it

The word for powder that turned into a lump is "caked". The process is "caking". Anticaking agents are used to prevent this.

### Looking for terminology for when a hygroscopic chemical gets moisture in it

I am afraid that there is no single word to describe this process because it must a multistep process with a lot of complications. Hygroscopic substances can become deliquescent, which means these ...
• 36.6k

### What does the 'S' stand for in base-centered cubic crystals and Bravais lattices?

S also has German origins: seitenflächenzentriert (side face centered). Reference: International Tables for Crystallography, Volume A, Space Group Symmetry, Fifth Edition, Springer 2005, pg. 748. One ...
• 36.6k
Accepted

### What does it mean when a molecule is described as "optically stable"?

Optical stability is a qualitative property rather than a quantitative one. If you want to describe the rate of racemization quantitatively, you can measure the Gibbs free energy of activation for the ...
• 273