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

# Hypothetical cP16 Ferrite Structure

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• 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)

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 Structures indexed by: This is a mirror of an old page created at theNaval Research LaboratoryCenter for Computational Materials ScienceThe 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).