These lattice parameters show an almost Two kinds of spodumenes, LiNiSi2O6 and smooth change with the ionic radii as two LiTiSi2O6, have been synthesized by solid state different trends, one is Al-Fe-Sc-In series and reaction using a belt type high pressure appara the other Ni-Cr-V-Ti series. tus (Fukunaga et al., 1979).
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