The Miller indices- searching for a proof

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Discussion Overview

The discussion revolves around seeking a rigorous mathematical proof for Lemma 1 related to Miller indices in crystallography. Participants express challenges in understanding the provided "mini proof" and explore various approaches to derive the results.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Anton requests clarification on the proof of Lemma 1 from a crystallography text, indicating difficulty with the existing explanation.
  • One participant mentions attempting to derive results using equations related to planes in a lattice structure, suggesting a complex approach involving multiple variables.
  • Another participant proposes that a more elegant method might involve considering the number of lattice points within a quadrant, although this would require addressing degenerate planes.
  • Links to external resources are shared, indicating that similar concepts are discussed elsewhere, but no consensus on the proof is reached.
  • Participants acknowledge that the topic is often assumed to be basic knowledge, yet they find it challenging to grasp fully.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and approaches to the proof, indicating that multiple competing views remain and the discussion is unresolved.

Contextual Notes

Participants note the complexity of the proof and the assumptions involved in deriving results, but specific limitations or unresolved mathematical steps are not detailed.

antonni
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Hi all, first let me post this (from "Elementary Crystallography An Introduction to the Fundamental Geometrical Features of Crystals" by Buerger):
https://www.physicsforums.com/attachments/1-png.82644/
Can someone please explain me the proof of Lemma 1? I just can not see it with the "mini proof" provided. Maybe a rigorous mathematical proof?

Thank you,

Anton
 

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don't know really how to reword it...but others can try
 
i tried for quite a while to derive the results using a*(x-x_0)+b*(y-y_0)+c*(z-z_0)=0 equations, but got B*C+B^2*C/A+C^2*B/A planes to reach A*B*C along the x axis...

there may be a more elegant approach considering the number of latice points within the quadrant (from origin to rational plane) where each point is where a new parallel plane would originate. but then you would have to remove all the degenerate planes

here is another place that states the same and does a rough sketch: https://books.google.com/books?id=SHzeQ49ZlH4C&pg=PA12&lpg=PA12&dq=ABC+planes+miller&source=bl&ots=QLFbVXZoyf&sig=RJbIjR6Nd4Gm_AJx0QClHio1GFU&hl=en&sa=X&ei=pDFmVcKoCsXUsAWiuID4DA&ved=0CDkQ6AEwAw#v=onepage&q=ABC planes miller&f=false
 
Thanks for the reply...yes, just one of those things everyone takes for granted and think its basic knowledge, but not straight forward at all

ill try it again
 

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