Table 2036_f. Structures of silicides.
Silicides |
Original metal phase |
nm of Si
consumed
per nm of
metal |
nm of
resulting
silicide
per nm of
metal |
Si consumption (nm Si/nm Silicide) |
Impurity precipitates |
Number density of silicide (1022/cm3) |
Density (g/cm3) |
V per Si (Å3) |
V per metal atom (Å3) |
Space group |
silicides suitable for epitaxial growth on Si |
Structure |
Lattice constant (Å) |
Atomic /Unit volume (Å3)* |
Formula unit per unit V |
Lattice mismatch
with Si |
Strain induced |
Co |
|
|
|
|
|
|
|
|
|
|
|
|
|
6.62/ |
|
|
|
CoSi |
β-Co |
1.82 |
1.98-2.02 |
|
|
4.562 |
6.582 |
|
|
|
|
Cubic |
a=4.4426 |
|
|
|
|
|
β-Co |
3.61-3.64 |
3.49-3.52 |
|
|
2.590 |
4.98 |
|
|
|
Good |
|
a=5.365 |
|
|
1.2 % |
Lower compressive strain than TiSi2 |
CoSi/Co2Si |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Co2Si |
α-Co |
0.91 |
1.47 |
|
|
3.062 |
7.46 |
|
|
|
|
Orthorhombic |
a=4.918, b=3.737, c=7.109 |
|
|
|
|
Cr |
|
|
|
|
|
|
|
|
|
|
|
|
|
7.23/ |
|
|
|
CrSi |
|
|
|
|
|
|
5.36 |
|
|
|
|
Cubic |
a=4.607 |
|
|
|
|
|
|
3.34 |
3.05 |
|
|
|
4.978 |
|
|
|
|
Tetragonal |
|
|
|
|
|
|
|
3.34 |
3.05 |
|
|
|
4.63 |
|
|
|
Good with a axis |
Hexagonal |
|
|
|
0.0% |
|
Cr3Si |
|
|
|
|
|
|
6.46 |
|
|
|
|
Cubic Al5 |
a=4.5578 |
|
|
|
|
Cr5Si3 |
|
|
|
|
|
|
5.864 |
|
|
|
|
Tetragonal |
a=9.170, c=4.636 |
|
|
|
|
Cu3Si |
|
|
|
|
|
|
|
|
|
|
|
η"-Orthorhombic |
|
|
|
|
|
Dy5Si3 |
|
|
|
|
|
|
|
|
|
|
|
Hexagonal |
a = 8.392, c = 6.284 |
|
|
|
|
ErSi |
|
|
|
|
|
|
|
|
|
|
|
Orthorhombic |
a = 7.772, b = 3.785, c = 5.599 |
|
|
|
|
ErSi |
|
|
|
|
|
|
|
|
|
|
|
Orthorhombic |
a = 4.197, b=10.382, c = 3.791 |
|
|
|
|
Er5Si3 |
|
|
|
|
|
|
|
|
|
|
|
Hexagonal |
a = 8.291, c = 6.220 |
|
|
|
|
Er5Si4 |
|
|
|
|
|
|
|
|
|
|
|
Orthorhombic |
a=7.27, b=14.32, c=7.58 |
|
|
|
|
Fe |
|
|
|
|
|
|
|
|
|
|
|
|
|
7.11/ |
|
|
|
FeSi |
|
|
|
|
|
|
6.162 |
|
|
|
|
Cubic |
a=4.4891 |
|
|
|
|
α-FeSi2 |
|
3.39 |
3.47 |
|
|
|
4.94 |
|
|
|
Good |
Tetragonal |
a=2.69, c=5.134 |
|
|
0.9% |
|
β-FeSi2 |
|
3.39 |
3.47 |
|
|
|
|
|
|
|
|
Orthorhombic |
|
|
|
|
|
Fe3Si |
|
|
|
|
|
|
7.181 |
|
|
|
|
Cubic |
a=5.6554 |
|
|
|
|
GdSi2 |
|
|
|
|
|
|
|
|
|
|
|
Orthorhombic |
|
|
|
|
|
GdSi2-x |
|
|
|
|
|
|
|
|
|
|
|
Hexagonal |
|
|
|
|
|
Gd5Si3 |
|
|
|
|
|
|
|
|
|
|
|
Hexagonal |
a = 8.507, c = 6.402 |
|
|
|
|
Hf |
|
|
|
|
|
|
|
|
|
|
|
|
|
13.63/ |
|
|
|
HfSi |
|
|
|
|
|
|
10.270 |
|
|
|
|
Orthorhombic |
a=6.855, b=3.753, c=5.191 |
|
|
|
|
HfSi2 (C49) |
|
1.77 |
2.14 |
|
|
|
7.981 |
|
|
|
Good |
Orthorhombic |
a=3.677, b=14.550, c=3.649 |
|
|
|
|
Hf2Si |
|
|
|
|
|
|
11.685 |
|
|
|
|
Tetragonal |
a=6.48, c=5.21 |
|
|
|
|
Hf3Si2 |
|
|
|
|
|
|
|
|
|
|
|
Tetragonal |
a=7.00, c=3.671 |
|
|
|
|
Hf5Si3 |
|
|
|
|
|
|
10.837 |
|
|
|
|
Hexagonal |
a=7.890, c=5.558 |
|
|
|
|
IrSi |
|
|
|
|
|
|
13.065 |
|
|
|
|
Orthorhombic |
a=5.558, b=3.211, c=6.273 |
|
|
|
|
IrSi3 |
|
|
|
|
|
|
|
|
|
|
Good |
Hexagonal |
a=4.350, c=6.630 |
|
|
1.8% |
|
Ir2Si |
|
|
|
|
|
|
17.066 |
|
|
|
|
Orthorhombic |
a=5.284, b=3.989, c=7.615 |
|
|
|
|
Ir3Si |
|
|
|
|
|
|
18.511 |
|
|
|
|
Tetragonal |
a=5.222, c=7.954 |
|
|
|
|
MnSi |
|
|
|
|
|
|
|
|
|
|
|
Cubic |
|
|
|
|
|
MnSi2-x |
|
|
|
|
|
|
|
|
|
|
|
Tetragonal/FeS2 |
a=5.52 |
|
|
1.7% |
|
MnSi2 |
|
|
|
|
|
|
|
|
|
|
Good |
Tetragonal/FeS2 |
a=5.52 |
|
|
1.7% |
|
Mn11Si19 |
|
|
|
|
|
|
|
|
|
|
|
Tetragonal |
|
|
|
|
|
Mo |
|
|
|
|
|
|
|
|
|
|
|
|
|
9.41/ |
|
|
|
|
|
|
|
|
|
|
6.24 |
|
|
I4/mmm |
Good |
|
a=3.2056(3);
c=7.8450(4) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Good |
Hexagonal |
a=4.61 |
|
|
4.1% |
|
|
|
2.56 |
2.59 |
|
|
|
6.24 |
|
|
|
|
|
|
|
|
|
|
Mo3Si |
|
|
|
|
|
|
8.968 |
|
|
|
|
Cubic |
a=4.890 |
|
|
|
|
Mo5Si3 |
|
|
|
|
|
|
8.24 |
|
|
|
|
Tetragonal |
a=9.62, c=4.90 |
|
|
|
|
Nb |
|
|
|
|
|
|
|
|
|
|
|
|
|
11.06/ |
|
|
|
Nb/Nb5Si3 |
|
|
|
|
|
|
|
|
|
|
|
(Eutectic) |
|
|
|
|
|
|
|
2.18 |
2.39 |
|
|
|
5.66 |
|
|
|
Good |
Hexagonal |
a=4.7971, c=6.592 |
|
|
4.2% |
|
|
|
2.18 |
2.39 |
|
|
|
5.66 |
|
|
|
|
Tetragonal |
|
|
|
|
|
NbSi3 |
|
|
|
|
|
|
7.16 |
|
|
|
|
Tetragonal |
|
|
|
|
|
Nb4Si |
|
|
|
|
|
|
4.46 |
|
|
|
|
Hexagonal |
a=3.59, c=4.46 |
|
|
|
|
Nb5Si3 (D8b) |
|
|
|
|
|
|
7.16 |
|
|
|
|
Hexagonal |
|
|
|
|
|
Nb5Si3 |
|
|
|
|
|
|
|
|
|
|
|
Tetragonal |
a=10.026, c=5.0717 |
|
|
|
|
Ni |
|
|
|
|
|
|
8.91 |
-- |
10.94 |
|
|
Cubic/Fm3m |
3.5238 |
6.60/ 43.76 |
4 |
|
|
Ni2Si |
|
0.91 |
1.47 |
|
|
|
7.51 |
32.15 |
16.07 |
|
|
Orthorhombic |
a=7.39, b=9.90, c=7.03 |
514.3 |
16 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Orthorhombic |
a=5.00, b=3.73, c=7.04 |
|
|
|
|
Ni3Si |
|
0.61 |
1.31 |
|
|
|
7.87 |
43.08 |
14.36 |
|
|
Cubic/Pm3m |
a=3.5056 |
43.08 |
1 |
|
|
Ni3Si2 |
|
1.22 |
1.75 |
|
|
|
6.71 |
28.73 |
19.16 |
|
|
Orthorhombic /Cmc21 |
a=12.29, b=10.805, c=6.924 |
919.5 |
16 |
|
|
Ni31Si12 |
|
0.71 |
1.40 |
|
|
|
7.56 |
39.46 |
15.28 |
|
|
Hex./p321 |
a=6.671, c=12.288 |
1421 |
3 |
|
|
NiSi (B31) |
|
1.83 |
2.20 -2.34 |
|
|
|
5.97 |
24.12 |
24.12 |
|
|
Orthorhombic /Pnma |
a=5.233, b=3.258, c=5.659, CTE |
96.48 |
4 |
|
|
NiSi |
|
|
|
|
|
|
|
|
|
|
|
Cubic |
a=4.446 |
|
|
|
|
NiSi2 (C1) |
|
3.65 -3.66 |
3.61 -3.63 |
|
|
|
4.80 |
19.75 |
39.50 |
|
Good |
Cubic/ Fm3m /CaF2 |
a=5.416 |
158.0 |
4 |
0.4% |
|
OsSi |
|
|
|
|
|
|
13.71 |
|
|
|
|
Cubic |
a=4.729 |
|
|
|
|
OsSi2 |
|
|
|
|
|
|
|
|
|
|
|
Monoclinic |
a=8.77, b=3.00, c=7.38 |
|
|
|
|
Os2Si3 |
|
|
|
|
|
|
|
|
|
|
|
Tetragonal |
a=5.58 |
|
|
2.8% |
|
Pd |
|
|
|
|
|
|
|
|
|
|
|
|
|
8.87/ |
|
|
|
PdSi (B31) |
|
1.36 |
1.97 |
|
|
|
7.693 |
|
|
|
|
Orthorhombic |
a=5.599, b=3.381, c=6.133 |
|
|
|
|
Pd2Si (C22) |
|
0.68 |
1.44 |
|
|
|
9.589 |
|
|
|
Good |
Hexagonal |
a=13.055, c=27.490 |
|
|
2.4% |
|
Pt |
|
|
|
|
|
|
|
|
|
|
|
|
|
9.12/ |
|
|
|
PtSi (B31) |
|
1.22 |
2.04 |
|
|
|
12.394 |
|
|
|
Good |
Orthorhombic |
a=5.59, b=3.603, c=5.932 |
|
|
9.5% |
|
Pt2Si (C22) |
|
0.66 |
1.43 |
|
|
|
16.268 |
|
|
|
|
Tetragonal |
a=3.933, c=5.910 |
|
|
|
|
PtSi2 (B31) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Good |
Tetragonal |
|
|
|
|
|
RhSi |
|
|
|
|
|
|
8.513 |
|
|
|
Good |
Cubic |
a=4.675 |
|
|
|
|
Rh2Si |
|
|
|
|
|
|
9.90 |
|
|
|
|
Orthorhombic |
a=5.408, b=3.930, c=7.383 |
|
|
|
|
Rh3Si2 |
|
|
|
|
|
|
|
|
|
|
|
Hexagonal |
a=11.851, c=3.623 |
|
|
|
|
Rh5Si3 |
|
|
|
|
|
|
9.56 |
|
|
|
|
Orthorhombic |
a=5.317, b=10.131, c=3.895 |
|
|
|
|
RuSi |
|
|
|
|
|
|
8.246 |
|
|
|
|
Cubic |
a=4.703 |
|
|
|
|
Ru2Si |
|
|
|
|
|
|
9.749 |
|
|
|
|
Orthorhombic |
a=5.279, b=4.005, c=7.418 |
|
|
|
|
Ru2Si3 |
|
|
|
|
|
|
6.96 |
|
|
|
Good |
Tetragonal |
a=11.705, c=8.954 |
|
|
1.8% |
|
Si |
|
|
|
|
|
|
2.33 |
20.01 |
|
|
|
Cubic/ Fd-3m |
5.4309 |
12.06/ 160.1 |
8 |
|
|
Ta |
|
|
|
|
|
|
|
|
|
|
|
|
|
10.90/ |
|
|
|
|
|
2.21 |
2.41 |
|
TaB2, TaAs |
|
9.08 |
|
|
|
Good |
Hexagonal |
a=4.7821, c=6.5695 |
|
|
4.4% |
|
Ta2Si |
|
|
|
|
|
|
13.544 |
|
|
|
|
Tetragonal |
a=6.157, c=5.039 |
|
|
|
|
|
|
|
|
|
|
|
13.401 |
|
|
|
|
Hexagonal |
|
|
|
|
|
Ta5Si3 |
|
|
|
|
|
|
13.4 |
|
|
|
|
Tetragonal |
a=9.88, c=5.06 |
|
|
|
|
TbSi |
|
|
|
|
|
|
|
|
|
|
|
Orthorhombic |
a = 7.919, b = 3.833, c = 5.703 |
|
|
|
|
Tb5Si4 |
|
|
|
|
|
|
|
|
|
|
|
Orthorhombic |
a = 7.41, b = 14.58, c = 7.69 |
|
|
|
|
Ti |
|
|
|
|
|
|
|
|
|
|
|
|
|
10.60/ |
|
|
|
TiSi |
|
|
|
|
|
|
4.32 |
|
|
|
|
Orthorhombic |
a=6.544, b=3.638, c=4.997 |
|
|
|
|
Ti5Si3 (D8m) |
|
|
|
|
|
|
4.32 |
|
|
|
|
|
|
|
|
|
|
Ti5Si3 |
|
|
|
|
|
|
4.32 |
|
|
|
|
Hexagonal |
a=7.429, c=5.1392 |
|
|
|
|
Ti/Ti5Si3 |
|
|
|
|
|
|
|
|
|
|
|
(Eutectic) |
|
|
|
|
|
TiSi2 (C49) |
|
2.27 |
2.51 |
|
TiB2, TiAs |
|
4.043 |
|
|
|
Good |
Base-centred orthorhombic |
a = 3.62,
b = 13.76,
c = 3.60 |
|
|
|
Higher compressive strain than CoSi2 |
|
|
2.27 |
2.51 |
|
TiB2, TiAs |
|
4.043 |
|
|
|
Good |
Face-centered orthorhombic |
a = 8.267,
b = 4.80,
c = 8.55
|
|
|
|
|
Ti(Si1−yGey)2 C54 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
V |
|
|
|
|
|
|
|
|
|
|
|
|
|
8.35/ |
|
|
|
|
|
2.89 |
2.77 |
|
|
|
|
|
|
|
|
Tetragonal |
|
|
|
|
|
|
|
2.89 |
2.77 |
|
|
|
4.627 |
|
|
P6422 (181) |
Good with a axis |
|
a=4.571, c=6.372 |
|
|
3.1% |
|
V3Si |
|
|
|
|
|
|
5.71 |
|
|
|
|
Cubic Al5 |
a=4.7253 |
|
|
|
|
V5Si3 |
|
|
|
|
|
|
5.321 |
|
|
|
|
Tetragonal |
a=9.429, c=4.756 |
|
|
|
|
W |
|
|
|
|
|
|
|
|
|
|
|
|
|
9.53/ |
|
|
|
W5Si3 |
|
|
|
|
|
|
14.5 |
|
|
I4/mmm |
|
|
a=3.2138(2);
c=7.8299(3) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
a=9.605, c=4.964 |
|
|
|
|
|
|
|
|
|
|
|
9.857 |
|
|
|
|
Hexagonal |
|
|
|
|
|
|
|
2.53 |
2.58 |
|
|
|
|
|
|
C11b |
Good |
Tetragonal |
a=3.211, c=7.868 |
|
|
|
|
YSi |
|
|
|
|
|
|
|
|
|
|
|
Orthorhombic |
a = 4.257, b=10.527, c = 3.839 |
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YSi2 |
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Orthorhombic |
a = 4.04, b = 3.95, c = 13.23 |
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Tetragonal |
a = 4.04, c = 13.42 |
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Y5Si3 |
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Hexagonal |
a = 8.475, c = 6.324 |
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Y5Si4 |
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Orthorhombic |
a = 7.39, b = 14.52, c = 7.64 |
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Zr |
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14.05/ |
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ZrSi |
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5.654 |
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Orthorhombic |
a =6.982, b =3.786, c=5.302 |
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ZrSi2(C49) |
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1.72 |
2.14 |
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4.86 |
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Good |
Orthorhombic |
a =3.721, b =14.68, c=3.683 |
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Zr2Si |
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6.04 |
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Tetragonal |
a =6.6120, c=5.2943 |
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Zr5Si3 |
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6.04 |
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Hexagonal |
a=7.945, c=5.559 |
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*For a single element: atomic/unit volumes; For a silicide unit: unit volume only. |
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