Krystallometrie.

1127

Setzt man o co c —

ob ~

“ 1, so hat man1

/

Y 3 n> ^__

i Y'S -(-2 “ ^3} /- 5(J^'5 2)

= r irscrs-i).

3 — f'Y»

icr^-i) _

r YY5a r 5-V(3’ ZZ r~5)= ri Y5= ^crs-i)

be = (rs-l) YYö(Y5-‘2)

ae = 8 f=f = Y YHY 5 - 2 )

of zi

b c —f C ZI

bf =

a nne z

Y5 =

a efi = Yir5(r5-2)

2 rirscrö—2)

Tg. boc

2,23606753

b c

o c

3 — Y5, boc = 37°22'38",12

Tg. c o fTg. 2 cofTg. b o fSin. 2 b o fSin. ydoe

Sin. |gof;

= f ^- = Kr5-

o c

2.

■i),

= ^ f =H3r5),

a e ^

=^=t r t-

e f

cof = 31°43'2", 91

2cof= 63°26'5", 82

b o f — 20° 54' 18", 56

boe — 41° 48'37", 13I Vdoe — 35° 15'51",77'doe =70° 31'43'', 55

^.=i(r5-D,jigof=i8“

1

gof

" r5+i’]

~ brae “ bcf in YY — 36°

g o f = 36°360°

10

mb e “ 2 X 36° — 72°d b e = 3 x 36° = 108°gfe = 4x 36° = 144°cbe =3X18° = 54°

y. Bd.

C c c c