† For more detailed discussions of the origin of the distorted ccp structure
of indium and an overall view of the structures of the group 13
metals, see: U. Ha¨ussermann et al. (1999) Angewandte Chemie International
Edition, in English, vol. 38, p. 2017; U. Ha¨ ussermann et al.
(2000) Angewandte Chemie International Edition, in English, vol. 39,
p. 1246.
‡ Although we often refer to ‘atmospheric pressure’, a pressure of
1 bar (1:00 105 Pa) has been defined by the IUPAC as the standard
pressure. Until 1982, the standard pressure was 1 atmosphere
(1 atm ¼ 101 300 Pa) and this pressure remains in use in some tables of
physical data.