Crystal Lattice Structures:	Creation Date: 10 Apr 2002
	Last Modified: 21 Oct 2004

Hypothetical cP16 Ferrite 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)

---

• Ferrite is steel with a bcc structure. This structure represents one possible ordering which might be found in an Fe-Ni-Cr-Mo steel. Note that it is not meant to represent a real steel.
• When x = ¼ the atoms are on the sites of a bcc lattice.
• In that case, replacing the Mo atom by Cr makes this structure equivalent to our hypothetical cI16 ferrite structure.

---

• Prototype: CrFe₈MoNi₆ (hypothetical)
• Pearson Symbol: cP16
• Space Group: Pm3m (Cartesian and lattice coordinate listings available)
• Number: 221
• Primitive Vectors:

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

• Basis Vectors:
  
  Since this is a simple cubic lattice we'll forgo the listing of the lattice coordinates.
  
  

  B1	=	0	(Cr)	(1a)
  B2	=	+ x a X + x a Y + x a Z	(Fe)	(8g)
  B3	=	- x a X + x a Y + x a Z	(Fe)	(8g)
  B4	=	+ x a X - x a Y + x a Z	(Fe)	(8g)
  B2	=	+ x a X + x a Y - x a Z	(Fe)	(8g)
  B6	=	- x a X - x a Y - x a Z	(Fe)	(8g)
  B7	=	+ x a X - x a Y - x a Z	(Fe)	(8g)
  B8	=	- x a X + x a Y - x a Z	(Fe)	(8g)
  B9	=	- x a X - x a Y + x a Z	(Fe)	(8g)
  B10	=	½ a X	(Ni-I)	(3c)
  B11	=	½ a Y	(Ni-I)	(3c)
  B12	=	½ a Z	(Ni-I)	(3c)
  B13	=	½ a Y + ½ a Z	(Ni-II)	(3d)
  B14	=	½ a X + ½ a Z	(Ni-II)	(3d)
  B15	=	½ a X + ½ a Y	(Ni-II)	(3d)
  B16	=	½ a X + ½ a Y + ½ a Z	(Mo)	(1b)

---

Go back to the body-centered cubic and related structures page.

Go back to Crystal Lattice Structure page.

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).