The D519
(Al3Ni2) Structure
Last modified 5 April
2001
You can now
- Prototype: Al3Ni2
- Pearson Symbol: hP5
- Strukturbericht Designation: D519
- Space Group: P(-3)m1 (Cartesian and lattice coordinate listings
available)
- Number: 164
- Other Compounds with this Structure:
Al3Cu2, Al3Pd2,
Al3Pt2, Al3In2,
Al3Tc2, In3Al2,
In3Pd2, In3Pt2,
Ga3Pt2
- Primitive Vectors:
- A1 = ½ a X - ½
31/2 a Y
- A2 = ½ a X + ½ 31/2
a Y
- A3 = c Z
- Basis Vector:
- B1 = 0 (Al) (1a)
- B2 = 1/3 A1 + 2/3
A2 + z1 A3 = ½ a
X + ½ 3-1/2 a Y + z1 c
Z (Al) (2d)
- B3 = 2/3 A1 + 1/3
A2 - z1 A3 = ½ a
X - ½ 3-1/2 a Y - z1 c
Z (Al) (2d)
- B4 = 1/3 A1 + 2/3
A2 + z2 A3 = ½ a
X + ½ 3-1/2 a Y + z2 c
Z (Ni) (2d)
- B5 = 2/3 A1 + 1/3
A2 - z2 A3 = ½ a
X - ½ 3-1/2 a Y - z2 c
Z (Ni) (2d)
Notes:
- Either the 3 Al atoms or Al(B1) and
the Ni atoms form a trigonal omega structure.
- Using the choices of internal parameters for Al3Ni2,
this can be viewed as a five-layer close-packed unit cell with stacking
ABCBCA.
Go back to the Hexagonal Close Packed structures
page.
Go back to Crystal Lattice Structure
page.
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