Table 1. Crystallographic Data for Mg29–xPt4+y (x = 0.47, y = 0.07).
| composition | Mg28.53Pt4.07 |
| space group | F4̅3m |
| Pearson symbol | cF391.2 |
| formula units per unit cell, Z | 12 |
| unit cell parameter, a | 20.1068(2) Åa |
| unit cell volume, V | 8128.8(3) Å3 |
| calculated density, ρ | 3.63 g cm–3 |
| crystal shape | irregular |
| crystal size | 0.080 × 0.090 × 0.095 mm3 |
| diffraction system | RIGAKU AFC7 |
| detector | Saturn 724+ CCD |
| radiation, wavelength, λ | Mo Kα, 0.71073 Å |
| scan type; step per degree; N(images) | φ, 0.5, 1140 |
| 2θmax | 79.96° |
| measured range in hkl | –35 ≤ h ≤ 36 |
| –36 ≤ k ≤ 24 | |
| –22 ≤ l ≤ 36 | |
| absorption correction | multi-scan |
| absorption coefficient | 22.61 mm–1 |
| T(max)/T(min) | 0.22/0.14 |
| N(hkl) measured | 41,127 |
| N(hkl) unique | 2487 |
| R(int) | 0.0507 |
| N(hkl) observed | 2446 |
| observation criteria | F(hkl) ≥ 4σ[F(hkl)] |
| number of refined parameters | 65 |
| RF, Rw | 0.0262, 0.0273 |
| largest diff. peak and hole (e– Å–3) | –0.11/0.13 |
a
Lattice parameter is refined from 106 reflections of the powder XRD pattern, Guinier technique, Cu Kα1 radiation, λ = 1.54056 Å.