Transcript 米勒指標– hkl 結晶學平面

Material Sciences 7a
Key Words of the Chapter
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Material Sciences 7a
Review (1)
Entry
FCC
BCC
HCP
Coordination no.
12
8
12
Atoms in unit cell
4
2
6
One side of unit cell (a)
2R 2
4R 3
-
Vc
a
Vs
4/3 πR
APF (5) = Vs / Vc
0.74
3
3
a
-
0.68
0.74
3
ρ = wt / Vc = nA / VcNa
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Material Sciences 7a
Review (2)
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Material Sciences 7a
決定結晶中之方向線或向量
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Material Sciences 7a
米勒指標 – hkl 結晶學平面
Shdai-081204
Material Sciences 7a
米勒指標 – hkl 結晶學平面
Shdai-081204
Material Sciences 7a
Ａ= 74.5 g/mol, R = 0.145 nm, 求密度 (ρ )?
ρ = nA / Vc Na
3
23
= 1 x 74.5 / 8 R x(6.023 x 10
3
)
23
= 74.5 / 8 (1.45 x 10 ) x (6.023x10
= 5.07 g/cm
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