Crystal Lattice Structures: Creation Date:  5 Jun 2008 Last Modified:  5 Jun 2008

# The Modderite (CoAs) Structure

You can now

• Note that the absolute value of the Cobalt coordinate z1 is arbitrary, and only the value of z2 - z1 is meaningful. We follow the reference and take z1 = ¼.

• Prototype: CoAs
• Pearson Symbol: oP8
• Strukturbericht Designation: none
• Space Group: Pna21 (Cartesian and lattice coordinate listings available)
• Number: 33
• Reference: P. S. Lyman and and C. T. Prewitt, Acta Cryst. B 40, 14-20 (1988).
• Other Compounds with this Structure: FeAs, VAs, FeP
• Primitive Vectors:  A1 = a X A2 = b Y A3 = c Z
• Basis Vectors:  B1 = + x1 A1 + y1 A2 + z1 A3 = + x1 a X + y1 b Y + z1 c Z (4a) (Co) B2 = - x1 A1 - y1 A2 + (½ + z1) A3 = - x1 a X - y1 b Y + (½ + z1) c Z (4a) (Co) B3 = (½ + x1) A1 + (½ - y1) A2 + z1 A3 = (½ + x1) a X + (½ - y1) b Y + z1 c Z (4a) (Co) B4 = (½ - x1) A1 + (½ + y1) A2 + (½ + z1) A3 = (½ - x1) a X + (½ + y1) b Y + (½ + z1) c Z (4a) (Co) B5 = + x2 A1 + y2 A2 + z2 A3 = + x2 a X + y2 b Y + z2 c Z (4a) (As) B6 = - x2 A1 - y2 A2 + (½ + z2) A3 = - x2 a X - y2 b Y + (½ + z2) c Z (4a) (As) B7 = (½ + x2) A1 + (½ - y2) A2 + z2 A3 = (½ + x2) a X + (½ - y2) b Y + z2 c Z (4a) (As) B8 = (½ - x2) A1 + (½ + y2) A2 + (½ + z2) A3 = (½ - x2) a X + (½ + y2) b Y + (½ + z2) c Z (4a) (As)

Go back to the other structures page.

Go back to Crystal Lattice Structure page.

 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).