Crystal Lattice Structures:	Creation Date: 6 Nov 2001
	Last Modified: 17 Feb 2007

The InNi₂ (B8₂) 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 Ni-I and Ni-II atoms are not equivalent, so replacing one of them with another species does not change the symmetry.
• Replacing the Ni-II atoms with In transforms the crystal into the C32 (hexagonal omega) phase.
• Removing the In or the Ni-II atoms transforms the crystal into the αLa (A3') structure, or, equivalently, the AsNi (B8₁) structure.
• Keeping only the In or the Ni-II atoms transforms the crystal to the hcp (A3) structure.
• We thank Joe Harrison of U. Alabama-Birmingham for correcting the coordinates of the In and Ni-II atoms
  • 15 March 2003: Well, we didn't get it right after all. This time, I think, we fixed things.
  • 17 Feb 2007: Corrected coefficient of A₃ in the last basis vector.

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• Prototype: InNi₂
• Pearson Symbol: hP6
• Strukturbericht Designation: B8₂
• Space Group: P6₃/mmc (Cartesian and lattice coordinate listings available).
• Number: 194
• Reference: Pearson, Alloys, p. 530.
• Other Compounds with this Structure: AgAsBa, BeSiZr, CuKSe, LiBC, Fe₂Sn, GaMnPt, etc.
• Primitive Vectors:

  A1	=	½ a X - ½ 3½ a Y
  A2	=	½ a X + ½ 3½ a Y
  A3	=	c Z

• Basis Vectors:

  B1 =		0		(Ni-I)	(2a)
  B2 =	½ A3	=	½ c Z	(Ni-I)	(2a)
  B3 =	1/3 A1 + 2/3 A2 + ¼ A3	=	½ a X + 12-½ a Y + ¼ c Z	(In)	(2c)
  B4 =	2/3 A1 + 1/3 A2 + ¾ A3	=	½ a X - 12-½ a Y + ¾ c Z	(In)	(2c)
  B5 =	2/3 A1 + 1/3 A2 + ¼ A3	=	½ a X - 12-½ a Y + ¼ c Z	(Ni-II)	(2d)
  B6 =	1/3 A1 + 2/3 A2 + ¾ A3	=	½ a X + 12-½ a Y + ¾ c Z	(Ni-II)	(2d)

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Structures indexed by: Strukturbericht Symbol Pearson Symbol Space Group Prototype

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