5 w ere eliminated from all future work o n the basis

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Unformatted text preview: y Scholtz e t . a l . ( 6 3 ) and Gerards et. al. (65). 3-3 ( c) X -RAY Lattice Parameters - G r o u p B ( quenched 1 0 0 0 C ) Room temperature X-ray d a t a were obtained for each of the group B ( quenched from 1 0 0 0 C ) s a m p l e s . T h e peaks were identified and lattice parameters calculated using the algorithm in 3 - 2 ( b). Fig. 15a and F i g . 1 5 b a re a summary of the lattice parameters vs. silver mole fraction a s determined from the d a t a . T h e X-ray diffraction patterns of the Ag x s a m p l e s which were quench cooled from 1 0 0 0 C c learly s h o w TiS 2 ) Page -2Ya- F igure 15a Hexagonal lattice parameter a ( A) v ersus silver mole fraction x for the group B s amples. 3 .43- s(" V cd Stage 1 3 .42- 3 .41- 3.40- + t + t t 2t d ilute Stage S tage 1 f0 01 . 0.2 03 . 0 .5 0.4 Figure 15h H exagonal lattice parameter c ( A ) v ersus silver m ole f raction x for the group B s amples. +t Stage 1 +++ Stage 2 + P age - 30- t hat the A gxTiS2 i s pure stage 2 f or 0 . 1 5 < x < 0 . 2 5 w ith mixed stage 1 a nd stage 2 f or 0 . 2 5 < x < 0 . 3 5 a nd pure stage 1 f or x > 0 . 3 5 . T he c-axis lattice parameter was found to increase uniformly from = 5.7 A ( pure T iS ) t o 2 = 6 . 0 8 as a f unction of the mole fraction x ( for 0 < x < 0 . 1 5 ) t hen increase to 1 2 . 1 A f or the stage 2 c ompound ( 0 . 1 5 < x < 0 . 2 5 ) w hich to a first approximation may be seen as consisting of an un--intercalated layer having a spacing of intercalated layer having a spacing of = 6 . 4 the empty T iS % 5 . 7 A a nd a n a ssuming that l ayer retains the same spacing a s pure T iS 2 t he stage 2 s tructure. 2 in For 0 . 2 5 < x < 0 . 3 5 t here was a c o- e xistance of stage 1 h aving a c parameter 3 6 . 4 ]1 a nd stage 2 w ith c 1 2 1 . T he c parameter for x > 0 . 3 5 w as s 6 . 4 f or the stage 1 c ompound. However there was some evidence of conversion to stage 2 c ompounds over a period < 6 m onths for samples with x > 0 . 3 0 i ndicating that stage...
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