Crystal Lattice Structures:	Creation Date: 23 April 2002
	Last Modified: 21 Oct 2004

The AlB₄Mg 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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• This ``doubled'' hexagonal omega phase was determined by Margadonna et al. (cond-mat/0204015).
• Note that the structure they describe puts the Al atom on the (1a) sites and the Mg atom on the (1b) site, but these sites are mislabeled in the text and in Table 1.
• Since the Boron forms graphitic sheets, we've moved this structure to the sp² section of the Carbon and Related Structures page.

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• Prototype: AlB₄Mg
• Pearson Symbol: hP6
• Space Group: P6/mmm (Cartesian and lattice coordinate listings available)
• Number: 191
• Primitive Vectors:

  A1	=	½ a X - ½ 31/2 a Y
  A2	=	½ a X + ½ 31/2 a Y
  A3	=	c Z

• Basis Vectors:

  B1	=		0		(1a)	(Al)
  B2	=	½ A3	=	½ c Z	(1b)	(Mg)
  B3	=	1/3 A1 + 2/3 A2 + z A3	=	½ a A1 + a/12½ Y + z c Z	(4h)	(B)
  B4	=	2/3 A1 + 1/3 A2 + z A3	=	½ a A1 - a/12½ Y + z c Z	(4h)	(B)
  B5	=	2/3 A1 + 1/3 A2 - z A3	=	½ a A1 - a/12½ Y - z c Z	(4h)	(B)
  B6	=	1/3 A1 + 2/3 A2 - z A3	=	½ a A1 + a/12½ Y - z c Z	(4h)	(B)

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Structures indexed by: Strukturbericht Symbol Pearson Symbol Space Group Prototype

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