Crystal Lattice Structures:	Creation Date: 18 Jan 2003
	Last Modified: 21 Oct 2004

The P₂I₄ 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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• Prototype: P₂I₄
• Pearson Symbol: aP6
• Space Group: P1 (Cartesian and lattice coordinate listings available)
• Number: 2
• Reference: Wyckoff, Vol. I, p. 375
• Primitive Vectors:

  A1	=	a X
  A2	=	bx X + by Y
  A3	=	cx X + cy Y + cz Z

• In terms of the traditional lattice parameters: a, b, c, α, β, and γ:
  
  

  bx	=	b cos(γ)
  by	=	b sin(γ)
  cx	=	c cos(β)
  cy	=	c [ cos(α) - cos(β) cos(γ) ]/sin(γ)
  cz	=	[c2 - cx2 - cy2]½

• Basis Vectors:

  B1	=	+ x1 A1 + y1 A2 + z1 A3	=	+ (x1 a + y1 bx + z1 cx) X + (y1 by + z1 cy) Y + z1 cz Z	(P)	(2i)
  B2	=	- x1 A1 - y1 A2 - z1 A3	=	- (x1 a + y1 bx + z1 cx) X - (y1 by + z1 cy) Y - z1 cz Z	(P)	(2i)
  B3	=	+ x2 A1 + y2 A2 + z2 A3	=	+ (x2 a + y2 bx + z2 cx) X + (y2 by + z2 cy) Y + z2 cz Z	(I-1)	(2i)
  B4	=	- x2 A1 - y2 A2 - z2 A3	=	- (x2 a + y2 bx + z2 cx) X - (y2 by + z2 cy) Y - z2 cz Z	(I-1)	(2i)
  B5	=	+ x3 A1 + y3 A2 + z3 A3	=	+ (x3 a + y3 bx + z3 cx) X + (y3 by + z3 cy) Y + z3 cz Z	(I-2)	(2i)
  B6	=	- x3 A1 - y3 A2 - z3 A3	=	- (x3 a + y3 bx + z3 cx) X - (y3 by + z3 cy) Y - z3 cz Z	(I-2)	(2i)

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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).