Body-centered-cubic # and types of holes?

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Discussion Overview

The discussion revolves around the types of holes (interstices) present in the Body-centered-cubic (BCC) unit cell, specifically focusing on whether they are tetrahedral, octahedral, or cubic, and the quantity of each type.

Discussion Character

  • Exploratory
  • Debate/contested

Main Points Raised

  • Some participants suggest that the holes in the BCC unit cell appear to be octahedral.
  • Others reference online literature indicating that the holes could be classified as tetrahedral, cubic, or a combination of tetrahedral and octahedral.
  • A participant expresses confusion regarding the conflicting information found in various sources.
  • Another participant shares a link to a website with animations related to crystal structures, although they are unable to access it due to technical restrictions.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus, as there are multiple competing views regarding the types of holes in the BCC unit cell and the sources of information are conflicting.

Contextual Notes

There are unresolved questions regarding the definitions and classifications of the types of holes, as well as the specific quantities of each type within the BCC structure.

sparkle123
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In the Body-centered-cubic (BCC) unit cell which types of holes (interstices) are there? (tetrahedral, octahedral, or cubic) How many of each type?

Thanks!
 
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sparkle123 said:
In the Body-centered-cubic (BCC) unit cell which types of holes (interstices) are there? (tetrahedral, octahedral, or cubic) How many of each type?

Thanks!

What do you think? What would your answers be and why?

http://www.members.tripod.com/~eppe/jpgs/bodcubic.jpg

bodcubic.jpg
 
They look like octahedral holes to me, but online literature says tetrahedral OR cubic OR tetrahedral and octahedral.

MEGACONFUSION
 
Nuts, my image source went away. I got it from Google Images, so here's another:

http://www.ul.ie/~walshem/fyp/Bcc%20unit.gif

[PLAIN]http://www.ul.ie/~walshem/fyp/Bcc%20unit.gif

You might try browsing through some Google Images for Body Centered Cubic, to see if the images help to show the shape of the spaces better...
 
Last edited by a moderator:
sparkle123 said:
They look like octahedral holes to me, but online literature says tetrahedral OR cubic OR tetrahedral and octahedral.

MEGACONFUSION

Can you post the links to the conflicting online sources? Thanks.
 

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