Density of liquid thallium
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Density of Liquid Thallium ~- 16 2
\ JOHNNY MARTINEZ AND HUGH A. WALLS
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W H I T E x and L u c a s ~ have d i s c u s s e d a l t e r n a t i v e t e c h niques for m e a s u r i n g liquid m e t a l d e n s i t y . Of the v a r i o u s t e c h n i q u e s , the A r c h i m e d i a n method b a s e d on the buoyancy of an i m m e r s e d bob is p a r t i c u l a r l y well 1500C ~ IO0*C !00 *C suited for m e a s u r e m e n t i n liquid m e t a l s at e l e v a t e d 1(5 4 I , I , , , \4 2.1 2.2 2.5 2.4 25 26 t e m p e r a t u r e s . If a d i f f e r e n t i a l technique for force m e a s u r e m e n t s i s also u s e d , the a c c u r a c y of this l i T (x I0a) method is e n h a n c e d b e c a u s e the d i f f e r e n t i a l technique Fig. 3--Activation analysis; kinetic results of Fig. 2 plotted as e l i m i n a t e s the effect of s u r f a c e t e n s i o n upon the r e log rate vs l I T K. s u l t s . It should be noted that the c a l c u l a t i o n of s u r f a c e t e n s i o n f r o m e x p e r i m e n t a l data i s typically dependent tive p h a s e s , it i s unlikely that s h o r t - r a n g e atom m o v e upon knowing d e n s i t y v a l u e s in the f i r s t p l a c e , and m e n t within the p a r e n t phase is the r a t e c o n t r o l l i n g m o r e o v e r , that some d e n s i t y m e a s u r e m e n t methods mechanism. r e q u i r e that the s u r f a c e t e n s i o n is f i r s t known. C o n s e It is p o s s i b l e that diffusion through the i n t e r p h a s e q u e n t l y , it is m o r e d e s i r a b l e to e l i m i n a t e s u r f a c e b o u n d a r y i s the r a t e c o n t r o l l i n g p r o c e s s . The s i m i l a r i t y t e n s i o n effects f r o m the c a l c u l a t e d d e n s i t i e s than between the a c t i v a t i o n e n e r g i e s obtained for the/3 ~ /~ to account d i r e c t l y for t h e s e effects u n l e s s a c c u r a t e and the g ~ ~t p o l y m o r p h i c t r a n s i t i o n s would then r e s u r f a c e t e n s i o n data a r e a v a i l a b l e . q u i r e that the r e s p e c t i v e i n t e r p h a s e b o u n d a r i e s be The m a j o r c o m p o n e n t s of the a u t o m a t i c d e n s i m e t e r comparable. used h e r e a r e an a u t o m a t i c r e c o r d i n g a n a l y t i c a l The morphology of the p r o d u c t phase is dependent on b a l a n c e , an e l e c t r o n i c c i r c u i t to c o n t r o l and to m e a s u r e the s t r u c t u r e of the p a r e n t phase; the ~t phase is apchanges i n c u r r e n t c o r r e s p o n d i n g to changes in weight, p r o x i m a t e l y s p h e r i c a l on d e v e l o p m e n t within the/3 phase a d i g i t a l v o l t m e t e r to indicate the voltage output f r o m and a p p e a r s as i r r e g u l a r l y shaped p a t c h e s in the ~ ~ ~t which d e n s i t y i s c a l c u l a t e d , a f u r n a c e and a s s o c i a t e d t r a n s f o r m a t i o n . T h i s d i f f e r e n c e in morphology could be t e m p e r a t u r e c o n t r o l l i n g and
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