# Tag(s) for amorphous solids, glasses and quasicrystals

I would like to discuss the creation of one or more tags for amorphous solids, glasses and quasicrystals.

There are many question on the site which address specifically glasses and the glass transition, for example this one and this one and this one.

Others are about amorphous solids in general, like this one, this one and this one.

Finally, other questions are about quasicrystals, like this one and this one.

We have a tag for spin glasses, but not a tag for glasses. I find this to be pretty absurd.

I recently proposed the tag amorphous-solids, but I'm wondering wether it could be useful to create the tag glasses (or glass) since someone asking a question about glasses will probably try to type "glass" instead of "amorphous".

Also, it could be useful to create a quasicrystals tag.

Update

Since the response has been mainly positive (or no one seriously objected, anyway...) I will create the glass tag. As for the quasicrystals tag, I still haven't decided what to do.

• Quasicrystals are neither amorphous nor glasses. While all glasses are amorphous solids, not all amorphous solids are glasses (although that may well be a sub-field dependent distinction). – Jon Custer Nov 21 '16 at 15:04
• @JonCuster You are right about quasicrystals; I reformulated the question in order to make it conceptually correct. You are also correct about the rest, but I knew that already :-) Thanks. – valerio Nov 21 '16 at 19:10
• I like the amorphous solids because it would allow the occasional polymer question to be tagged as well. I see your point about the glasses stuff too, though. Is there a disadvantage in creating both tags? – Sanya Nov 21 '16 at 21:52
• @Sanya I would prefer not to create too many new tags if not necessary. But I think that the "glass"/"glasses" tag is needed. – valerio Nov 21 '16 at 22:10
• Hi valerio92, would you by any chance be willing to act as, say, a custodian/protector for these tags, i.e. when new (& old) questions appear, which need to be tagged appropriately? – Qmechanic Nov 21 '16 at 23:28
• @Qmechanic I would be glad to do it! Actually, I already started to do so with the "amorphous-solids" tag – valerio Nov 22 '16 at 5:44
• I would say go on the quasicrystals as well, particularly if you can unify the existing questions under it. – Emilio Pisanty Nov 23 '16 at 11:10
• @EmilioPisanty Then I think I'll proceed with "quasicrystals" too. – valerio Nov 23 '16 at 11:20