Crystal Lattice Structures:	Reference Date: 18 Dec 1995
	Last Modified: 21 Oct 2004

The A15 (Cr₃Si) Structure

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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• The "A" Strukturbericht designation comes from the fact that this is also the structure of βW

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• Prototype: Cr₃ Si
• Pearson Symbol: cP8
• Strukturbericht Designation: A15
• Space Group: Pm3n (Cartesian and lattice coordinate listings available)
• Number: 223
• Reference: Nevitt
• Other systems with this Structure: βW, Nb₃Al, Cr₃O, Ti₃Sb, Ti₃Au, more (see the Reference)
• Primitive Vectors:

  A1	=	a X
  A2	=	a Y
  A3	=	a Z

• Basis Vectors:

  B1	=		0		(2a)	(Si)
  B2	=	½ A1 + ½ A2 + ½ A3	=	½ aX + ½ aY + ½ aZ	(2a)	(Si)
  B3	=	¼ A1 + ½ A2	=	¼ aX + ½ aY	(6c)	(Cr)
  B4	=	¾ A1 + ½ A2	=	¾ aX + ½ aY	(6c)	(Cr)
  B5	=	¼ A2 + ½ A3	=	¼ aY + ½ aZ	(6c)	(Cr)
  B6	=	¾ A2 + ½ A3	=	¾ aY + ½ aZ	(6c)	(Cr)
  B7	=	½ A1 + ¼ A3	=	½ aX + ¼ aZ	(6c)	(Cr)
  B8	=	½ A1 + ¾ A3	=	½ aX + ¾ aZ	(6c)	(Cr)

See vectors in LaTeX output format.

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Structures indexed by: Strukturbericht Symbol Pearson Symbol Space Group Prototype

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