The importance of initiating new search techniques for neutron EDM is empha
sised in this short paper. Crystal techniques allow to investigate the inte
raction of neutrons with electric fields of the order of several 109 V cm(-
1). This gives the possibility to test CP- and T-violations at stronger ele
ctric field levels than ever before. (C) 2000 Elsevier Science B.V. All rig
hts reserved.