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

A Discussion of selected references
335
compared. It is interesting to note that the values do not differ greatly although the
former refer to molality products and the latter to activity.
I/m
mCl
−
Table A-26: Comparison of
ο
app, I
ο
E corrections.
E /mV ( E + (k/2)·{log 10 m Cl– + m}/mV ( E + (k/2)·12D/ mV
ο
app, I
5.615 4.918 134.94 226.44 228.99
6.257 5.251 136.99 229.33 232.14
14.644 9.706 135.65 235.89 238.28
17.163 9.835 132.67 233.08 236.48
ο
app, I
The ionic strength changed during these measurements, Na 2 SO 4 /H 2 SO 4 cannot
be regarded as inert electrolyte, and the stability constants of the chlorido complexes
were evaluated in a doubtful way. Consequently the results were finally rejected.
[1973DAN/CHI]
The hydrolytic precipitation of iron(III) has been investigated at 25 °C in a 1 M
(Na)NO 3 medium by measuring the acidity of solutions by glass electrode
potentiometry. The data could be explained by assuming only the reaction Fe 3+ + NO −
3
+ 2 H 2 O(l) Fe(OH) 2 NO 3 (s) + 2 H + *
with log K = − (2.20 ± 0.03).
This paper is cited by [1995DJU/JEL] and these authors used the same method
of thermodynamic analysis to assign stoichiometry and stability constant to the
hydrolytic precipitate of tin(II) in a 3 M (Na)Cl medium.
[1973HOW/MOS]
In this short note it is pointed out that the crystal data on tin(II) hydroxide oxide of
[1961DON/MOS] have been superseded by data from single crystal measurements on
better crystals [1968HOW/MOS]. The primitive tetragonal unit cell dimensions are a =
7.98(1) Å and c = 9.17(1) Å, and the space group is P4/mnc or P4/nc. The structural
units (Sn 6 O 8 – two per unit-cell) are hydrogen bonded to one another (O–O between
units 2.80 Å) so that the structural units are Sn 6 (OH) 4 O 4 , corresponding to an analytical
formula 3SnO·H 2 O.
[1973HUL/DES]
A comprehensive and detailed review and critical evaluation of the experimental data on
thermodynamic properties of tin to 1970. Properties include: phases, structure, heat
capacity of solid, liquid and gas as functions of temperature, superconducting transition
temperature, electronic contribution coefficient, enthalpies and temperatures of
transition, enthalpies of solid, liquid and gas, standard and temperature dependent
10
s
CHEMICAL THERMODYNAMICS OF TIN, ISBN 978-92-64-99206-1, © OECD 2012