V O L U M E 28, NO. 3, M A R C H 1 9 5 6
42 1
108. Potassium Dicopper Tricyanide Monohyd rate, KCUAC N)3.H,0 DONALD 1. W A L K E R ' and E U G E N E STARITZKY, The University of California, Lor Alamor Scientific Laboratory, Lor Alamor, N. M.
w
u
-
1.66OTASSIUM
w 1.64-
sium cyanide is cooled in presence of excess solid copper cyanide. Stability relations of this compound in the system KCX-CuCNHzO are given by Bassett and Corbet ( 1 ) .
L
c
ya
1.62-
LL
w
CL
dicopper tricyanide monohydrate crystallizes when
P a saturated aqueous solution of copper cyanide and potas-
CRYSTAL ~IORPHOLOGY System and Class. Monoclinic, prismatic. Xxial Elements Calculated from Cell Dimensions. a : b : c = 1.484: 1: 0.912; p = 97.5'. Groth ( 2 ) lists axial elements for this compound which are incompatible with the above set of values but approximate the axial ratios and p determined for potassium
1.60-
6'o
O(45 OkO 055 h , WAVELENGTH IN
-(
0!60 0!65 MICRONS
Figure 1. Refringence and birefringence of potassium gold dicyanide as functions of wave length of light 100
C C
0 0
-
-
Partial Powder X-Ray Diffraction Pattern of Potassium Gold Cyanide hkl
d. A,, Calcd. 8.79 6.13
d, Obsd 8.72 6.10 5.67 4 53 4 38 4 03
5.69
ioi
210, 11'0 322
iii
200 333
4 56 4 39 4 04 3.G41 3,363 3,233 3.131 3,066
3.63
3.36 3.22 3.12
1
211. 211 432, 423
2.9-"9 2,920 j 2.844 2.803 2.706 2.432 2.417 2 374 2.345 2.282 i
422 310, 130
2.278 2.241
332 220 321, 312 31 1 433 33 1 201, 210
3.06
I / I Ib 10 5
4
2
1 1 5 2 8
3 07
10
2 92
2
Figure 1. Crystal of potassium dicopper tricyanide monohydrate
2.84
6
Orthographic projections on (100) and parallel to b
...
2.70
..
4
..
2:413 2.372 2,341
8 3
