Chemical Thermodynamics of Tin - Volume 12 - OECD Nuclear ...

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VIII Group 17 (halogen) compounds and complexes
Figure VIII-12: Solubility in the system SnCl 2 -HCl-H 2 O as a function of the
hydrochloric acid concentration. Experimetal data from [1947RYS/TUR] (: 5 °C; :
15 °C; : 25 °C); and from [1888ENG] (: 0 °C).
75
70
65
100 w(SnCl2 )
60
55
50
45
40
0 2 4 6 8 10 12 14
100 w(HCl)
VIII.2.2.2 SnCl 2 (s) - SnF 2 (s)
Compounds SnCl 2·SnF 2 and SnCl 2·3SnF 2 can be crystallised from aqueous solutions
with melting points between 185 − 195 °C and 179 − 181 °C, respectively
[1954NEB/BAS], [1969DON/SEN]. But no thermodynamical data are available.
VIII.2.2.3 SnCl 4 (l)
At room temperature SnCl 4 is a liquid with a melting point of 240 K and a boiling point
of 387 K. In saturated aqueous solutions formation of the hydrates SnCl 4·nH 2 O (n = 2,
3, 4, 5, 8, 9) has been reported [1972GME]. Stability ranges in contact with solution
extend up to 83 °C [1891MEY]. The dihydrate should be better denoted as an acid
H 2 [SnCl 4 (OH) 2 ].
VIII.2.2.4 Sn(OH)Cl 3·3H 2 O(s)
The compound crystallises from concentrated aqueous solutions during drying above
CaCl 2 [1914PFE/MUL].
CHEMICAL THERMODYNAMICS OF TIN, ISBN 978-92-64-99206-1, © OECD 2012