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4 votes
2 answers
557 views

What do consecutive letters A and B in the 4th column of PDB file signify?

What do the consecutive A and B in the 4th column identify in a PDB file downloaded from rcsb.org? The molecule name is 3CZ3 (...
majumderS's user avatar
4 votes
1 answer
288 views

Line Entry system like SMILES for metals?

SMILES is not designed for metallic compounds. Is there a similar ASCII line entry notation for metallic compounds, including repeating structure in space, &c.?
Sam's user avatar
  • 51
0 votes
2 answers
577 views

How to identify if a material is perovskite or not?

This is more of a materials science question, but I believe many of you have referred NIST Inorganic Crystal Structure Database (ICSD) database. I am collecting a database of perovskite materials and ...
Achintha Ihalage's user avatar
2 votes
1 answer
303 views

General notation for one of the d-orbitals

What is the general notation to represent the d-orbital with $l=2$, $m_l=0$, i.e. the orbital normally referred to as $\mathrm{d}_{z^2}$. To elaborate more, this orbital can be ordered in various ways ...
hat's user avatar
  • 427
4 votes
1 answer
191 views

Empirical formula of Berthollides

Can the empirical formula be defined for berthollides? Is it equal to the molecular formula, or it can't be defined?
EJC's user avatar
  • 14.4k