Thermal expansion and the equation of state of isotopically different sampl
es of KCN were measured in the temperature range 175-300 K and at pressures
up to 2 GPa by the neutron powder diffraction technique. No evidence of th
e influence of isotopic composition on the thermal expansion or the compres
sion isotherms was found. (C) 1998 American Institute of Physics. [S1063-77
61(98)02112-X].