' A rfr,^;-/C^.n *L-j c''-rL'L

fl.* a-*^*-'--ie'* q 't

fr

S ^ *--1-"L

A ,pr,4 1

y*T jL** l*Vjk

rV

5fr"*I'"\

f^, i l^1 ff ih-A-t-*o) Tr-- ^ fu--ft'* 1 #'-rs\'-04

r^) D,*f--fr'"1 *-fu;*L.) PA-';6 XA) t.""p.)-'y P "'-^9;'\

Pa.*'-'nUe"-P'"-."*'

2 ,

ft\ *-Jt^*r*,**i-***! - E

?-*r

s r y ?

f t M 'l t

@ @/ l t

R'

i at t{t

, U

q^^&

ft iJ*fl^4

3 "

rt-'Tt*rt* 0A)^"^4\ tffif d u 'nt , J W

' ) .- t -0L+v/-& *AtF'" - '

C*"t*n"**: -St"'u-f ? uo^t l IS b*; ^*i'fu1^ryFrp'.\* 4k-

Gr^^{LU / , A

-W P*-J'J^

t , .

. *A , A rt Ht* fr'**

td . M'*^ q*

\Iu,,. J*^ t J*-*-l^ ts"-^A :

-Ttr-; -A** * 4 -*/-'!%-i{ 1

Itrfr-*

f r AA . ' . r r l l

ft\ ol.sr-rs:tt

1 ,

+ i J l .Cf ;'SDP-""

5 .

A@ ([ *. A*^" f-^^ryx

".-S")th* r-,. jp-.*^,a*-*tr 4^ . (t ^.f*"

," p;LU'n^--r" ,'T iltalI u,,^ ,t,t AP",-,.*ffi

CW s*tuJ"L"Y;^"', 3.) o".l;*J.;---frJ-" (W^

,;h#"i'aol"(L#* ;6h)

'%

A, r ! . , , V(.-..*....l)..1f=

--,: g:. W:{:1::tf;;:-K;-" *?;*'*'*i*-*e-

fe^-' %T-# a'*r* 't'i;-

A- I a "4- 11'r/n44xi): ttAt&* g'#ffi

T,

iTh"?-i"tti"" .J"t;t"- l- -

!{tr'ro* least to most ittte tl Bravais Latticeslsvmmetric) ii : :_ _ . ." . "-" " "^tAF, i ;go"-

i,..r,r,,n,, tfi}f*;.' itij.i-*

: "-;-".l,|9i!tltl - -,1b.#9911-'1ffg:t l??so"-'i;;tnu -

---:

I i g,y :90" , l F, f = 90"

r* lffiffi _f

-*.--

|*il;- F";"**.l*llentered[.orttorr,o*u" ffiffiffi1!1rtf#*ticurar,1] *,'.-, -;- -- -*-**, *i*#f+;'tilr*'

l+.rto,"uor,rarut l/T+l('triad) i.wl---

- 'ililo* -:, lidatr'''3"de*q

-

1,,*,*'' ffi1ffi-l'"*" lffil"H

{}n

q ,

f * l[m'] f f i| . . . . " . l - . ^ . . ' ; ^L*_ffiffiffiJALtr&" $-S-t

D;r.;t o"^

' f l?Xa^-*

r / 1

f l ^, ' / ) . - /

t l ) i '\ t . / + r ' r i

1 \---1 V

I t '

Chapter 228

FocePtone

Lotttce Potnts of FCCUntt Cett

Tot

$f$i

1-o

Lo.ttlce Potnts of BccUntt Cett

Dtooonol Ptone o'Untt Cett

l.-*-1 t'- o{eJ

Foce Ptone of FCCUnlt Cett

Figure 2.1 Unit cell structure tor iace-centered cubic (FCC) and body-centcredcubic tgCC) unit cells.

Tab |e2 .2TheNumbcro fA tomsperUn i tCe l l f o r theFour Different Unit Cells

Number of Atornsper unit cell

SimpleBase-centeredFace-centeredBody-centered

Unit cell nameI242

Ptone of