What does this term mean (language/argot)

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Discussion Overview

The discussion revolves around the meaning of the term "L11 type Co-Pt ordered alloy" and the interpretation of "at. %" in the context of alloy composition. It includes theoretical and conceptual clarifications related to materials science and crystallography.

Discussion Character

  • Conceptual clarification
  • Technical explanation

Main Points Raised

  • One participant inquires about the meaning of "L11" in the context of Co-Pt ordered alloys, referencing several academic papers.
  • Another participant suggests that "L11" refers to a rhombohedral structure, providing a link for further information.
  • A different participant seeks clarification on the term "at. %" in alloy composition, questioning whether it simply indicates a 50% presence of silver (Ag) in the sample.
  • One participant confirms that "at. %" stands for atomic percentage, which is based on the number of atoms, contrasting it with weight percentage (w%).

Areas of Agreement / Disagreement

Participants express differing views on the meaning of "L11," with one proposing a specific structural interpretation while another seeks clarification. There is agreement on the interpretation of "at. %" as atomic percentage, but the initial inquiry about "L11" remains unresolved.

Contextual Notes

The discussion does not resolve the specific structural definition of "L11" and relies on external references for clarification. The interpretation of "at. %" is clarified, but the implications of this terminology in practical applications are not fully explored.

Who May Find This Useful

This discussion may be useful for researchers and students in materials science, particularly those interested in alloy compositions and crystallography terminology.

fluidistic
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hi fluidistic! :smile:

i think it means rhombohedral,

see http://cst-www.nrl.navy.mil/lattice/struk/l1_1.html :wink:
 
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tiny-tim said:
hi fluidistic! :smile:

i think it means rhombohedral,

see http://cst-www.nrl.navy.mil/lattice/struk/l1_1.html :wink:
Thank you very much tiny-tim! I've plotted the position of these atoms in VMD to visualize them in 3d.
Another question for anyone who knows: when they say
papers said:
Ag composition is around 50 at. %
what do they mean by . %? Do they simply mean that there's 50% of Ag in the sample? This looks a rather strange way of saying it.
 

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Ag composition is around 50 at. %

i'm guessing … could "at." be short for "atoms"? :confused:
 
at. % denotes percentage based on the number of atoms (also moles). While w% denotes percentage based on the weight.
 
Thank you infinitely guys. I wouldn't have figured it out on my own.
 

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