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ПРИМЕРЫ РЕШЕНИЯ ЗАДАЧ ПО КУРСУ PowerPoint PPT Presentation


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ПРИМЕРЫ РЕШЕНИЯ ЗАДАЧ ПО КУРСУ ФИЗИЧЕСКИЕ ОСНОВЫ ЭКСПЕРИМЕНТАЛЬНЫХ МЕТОДОВ ИССЛЕДОВАНИЯ РЕАЛЬНОЙ СТРУКТУРЫ КРИСТАЛЛОВ. Д.ф.-м.н., проф. Э.В.Суворов.

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ПРИМЕРЫ РЕШЕНИЯ ЗАДАЧ ПО КУРСУ

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..-.., . ..


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1. 5, 3, 8 a,b,c. .


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z

8c

y

3b

5a

x


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z

z

5b

y

1a

z

x

2c

1b

y

x


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.

m,m,p

h,k,l

, (a,b*)=(c,b*)=0 , b* , a c. (a,c*)=(b,c*)=0 , c* , , a b. (b,a*)=(c,a*)=0 , a*- , b c. ,

a1,a2,a3 . .


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, a,b,c . ..


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2.


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d

Z

Z*

y*

H

y

x

x*


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3. , Hhkl (hkl).


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(hkl).

, , ABC (hkl). H (hkl), , . AB. .

H , (H,AB), (H,AC), (H,CB) .


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4. ,

(hkl) ..


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H , (hkl).

(hkl), (h1k1l1), (h2k2l2), .

R - (hkl)

d - , s (, , s=0)

- .

, (mh+nk+pl)=s - ,


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5. . .


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,

, , , , , f1=f2=f3=f4=f

,

,

, :

hkl , F=4f;

hkl , F=0.


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6.

.

.


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7. , .

1.4 .

[[000; 1/2,1/2,0; 1/2,0,1/2; 0,1/2,1/2; 1/4,1/4,1/4; 3/4,3/4,1/4; 3/4,1/4,3/4; 1/4,3/4,3/4]].


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[[000; 1/2,1/2,0; 1/2,0,1/2; 0,1/2,1/2; 1/4,1/4,1/4; 3/4,3/4,1/4; 3/4,1/4,3/4; 1/4,3/4,3/4]]

-


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8 a . . ( ).


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, ,

f(x)

1

-

x

-a/2

a/2

,

, -,

, ,


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9. , ; =2,87, 55,84; =7,8/3; mH=1,65x10-24


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,

.. 2 . A , mH .


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10. 1 . - , =5,4306; (220); 450; - . K1=0,70926; K2=0,71354


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, , . , K1, , K1 K2 (.).

1 2 ..

,

,

, ,


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DuMond J.W. Phys. Rev. (1937), 52, p.872


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11. (220) ( MoK1 CuK1). - (MoK)(220)=(2.04+i0.017)10-6. - (CuK)(220)=(9.74+i0.340)10-6. =5,4306, MoK1=0.70926, CuK1=1.54051


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- . ,

. , , d

MoK

CuK ,


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12. , (220) MoK 1/10. - (220)=(2.04+i0.017)10-6. - 0=(3.156+i0.0162)10-6. =5,4306.


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.

- .

.

7,53110-4=7.531102


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13. .


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