277 



long time; moreover the salt is more easily hjdrolysed than the 

 cori-esponding oxalate. It contains 9,32 V„ of water, corresponding 

 to the presence of three molecules of crystallisation- water. 



The salt crystallises from an aqueous solution in the form of 

 thin, hexagonally bordered, orange-red plates, or occasionally in 

 somewhat thicker crystals, exhibiting however the same combination- 

 forms. They show appreciable oscillations of their angular values, 



MonocUnic-prismatic. 

 a:b:c = i ,2309 . 1 : 1 ,0783 ; /? = 86°36'. 



Fig. 6. 

 Racemic Potassium-Rhodium Malonate (H-SiJgO). 

 Formn observed: ^/ = |J00|, always predominant and very lustrous ; 

 ö = |lll| and a>r=|ril|, commonly equally large, occasionally o 

 much broader than vj, and yielding sharp reflexes; ??i = |210|, larger 

 or smaller, but always well reflecting; 6 = {010|, ordinarily narrow, 

 often absent, sometimes even broader than m. The external habit 

 is that of plates parallel to jlOOj, with a slight elongation in the 

 direction of the c-axis. 



