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P - Technische Universiteit Eindhoven

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2. Single crystal growth of sodium sulfate heptahydrate 24<br />

x2<br />

y1<br />

a<br />

y2<br />

x1<br />

5 mm<br />

b<br />

growth from center [mm]<br />

time [s]<br />

c<br />

growth from center [mm]<br />

time [s]<br />

Fig. 2.7: (a) Image of a single sodium heptahydrate crystal grown at 4.8 ◦ C in a 100 µl droplet<br />

with an initial concentration c 0 = 2.5 mole/kg. (b) Measured dimensions of a crystal<br />

grown in a solution with initial concentration c 0 = 2.5 mole/kg. (c) Measured dimensions<br />

in four directions of a crystal grown in a solution with initial concentration<br />

c 0 = 3.4 mole/kg. The error of the measurement is ±0.2 mmole/kg.

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