Determination of Crystal Structure of Systhetic Compound K_6CrNb_(15)O_(42) with Electron Diffraction Wu Bolin;Sun ZhenyaThe method of geometric composition of electron diffraction have been used to determine the crystal system and the lattice parameters of a new synthetic compound K_6CrNb_(15)O_(42). The results show that the crystal belongs to the hexagonal system with lattice parameters a=9. 14A, c= 12. 06AK_6CrNb_(15)O_(42);;Electron diffraction;;Lattice parameter