  We present evidence that the insulator to metal transition in (La,Ca)MnO3
near x~0.2 is driven by the suppression of coherent Jahn-Teller distortions,
originating from d type orbital ordering. The orbital ordered state is
characterised by large long-range Q2 distortions below To*-o'. Above To*-o' we
find evidence for coexistence between an orbital-ordered and -disordered state.
This behaviour is discussed in terms of electronic phases of an orbital ordered
insulating and orbital-disordered metallic states.
