Body-centered tetragonal carbon (bct-carbon) is a very hard material produced from graphite under high pressure at room temperature. Looking perpendicular to the slices [100] and [001], its structure looks hexagonal; from the slice [010] it appears to be built from small squares. In this Demonstration you can vary several parameters of the 3D atomic structure.


  • [Snapshot]
  • [Snapshot]
  • [Snapshot]


The chemical bonds of the squares of carbon atoms are colored red; the chemical bonds between squares of different layers are colored green.
Try the various viewpoints from the drop-down menu or drag to rotate the crystal.
The "slice" setter bar lets you restrict the atoms displayed to one of three slices of the crystal.
The "show" setter bar lets you make the atoms or links invisible.
Atom size
Use this slider to change the size of the black carbon atoms.
Atom opacity
Use this slider to make the atoms transparent.
Line thickness
Use this slider to change the thickness of the chemical bonds.
Line opacity
Use this slider to make the bonds transparent.
Square size
Use this slider to change the size of the carbon squares.
Square distance
Use this slider to set the distance between the centers of two neighboring carbon squares.
Distance between square layers
Use this slider to change the distance between adjacent layers of carbon squares.
Click this checkbox to reset the crystal parameters to their default value.
Click this checkbox to switch the "floor" display on and off.
Click this checkbox to display coordinate axes.
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.

Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-Step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2018 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+