Crystal Lattice Structures:	Creation Date: 25 Mar 2002
	Last Modified: 21 Oct 2004

Tetrahedrally Bonded Carbon with Four Member Rings

You can now

• see the structure from several perspectives;
• examine the structure with an external viewer; or
• download the coordinates of the atoms in these pictures in XYZ format.
• visualize the structure (Uses the JMOL Applet)

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• This structure was proposed by Peter Schultz of Sandia Albuquerque, to show that four-member rings could exist in amorphous carbon. See his 1998 APS talk. The published reference is Peter A. Schultz, Kevin Leung, and E. B. Stechel, Phys. Rev. B 59, 733-741 (1999), available on-line at PRB .

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• Prototype: C (hypothetical 4-member ring structure)
• Pearson Symbol: tI8
• Space Group: I4/mmm (Cartesian and lattice coordinate listings available)
• Number: 139
• Reference: P. Schultz et al., Phys. Rev. B 59, 733-741 (1999)
• Primitive Vectors:

  A1	=	a X
  A2	=	a Y
  A3	=	½ a X + ½ a Y + ½ c Z

• Basis Vectors

  B1	=	+ x A1 + x A2	=	+ x a X + x a Y	(C)	(8h)
  B2	=	- x A1 + x A2	=	- x a X + x a Y	(C)	(8h)
  B3	=	- x A1 - x A2	=	- x a X - x a Y	(C)	(8h)
  B4	=	+ x A1 - x A2	=	+ x a X - x a Y	(C)	(8h)

See these vectors LaTeX output format.

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Structures indexed by: Strukturbericht Symbol Pearson Symbol Space Group Prototype

This is a mirror of an old page created at the Naval Research Laboratory Center for Computational Materials Science The maintained successor is hosted at http://www.aflowlib.org/CrystalDatabase/ and published as M. Mehl et al., Comput. Mater. Sci. 136 (Supp.), S1-S828 (2017).