P - Technische Universiteit Eindhoven
P - Technische Universiteit Eindhoven
P - Technische Universiteit Eindhoven
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2. Single crystal growth of sodium sulfate heptahydrate 23<br />
background<br />
LEDs<br />
a<br />
air<br />
bubble<br />
growing<br />
hepthahydrate<br />
crystal<br />
b<br />
c<br />
x2<br />
y1<br />
y2<br />
x1<br />
5 mm<br />
Fig. 2.6: Images of sodium sulfate heptahydrate growth in a 100 µl droplet with an initial<br />
concentration of c 0 = 3.4 mole/kg. (a) Initially, the holder is filled with a sodium<br />
sulfate solution at approx. 33 ◦ C. (b) Precipitation of sodium sulfate heptahydrate<br />
is observed upon cooling when the supersolubility line is reached. (c) Crystal growth<br />
stops as the concentration reaches the heptahydrate solubility line.