Part II - Spin Crossover in Mononuclear and Dinuclear Complexes

Chapter 6

Colour Changes on Cooling

> This is a film compliled from photographs taken of a single crystal mounted on a glass fibre using nail polish. The photos were taken every 10 K on cooling and the white powder that appears on the sample at low temperature is frost which is caused by cryostream difficulties. The colour change from yellow at 400 K to dark red at 90 K takes place in two steps 400-300 K and 200-100 K.