16 P. T. Cleve, 



In percent: 



I, II. Calc 



SniäO. 25.71 25.16 174 24.47 



I2O5 70 80 71.04 501 70.46 



H^O (3.49) (3.80) 36 5.07 



711 100.00 



Periodate of samarium 



SmI05 + 4H20. 



A solution of periodic acid gives with a solution of the acetate 

 or of the nitrate of samarium a voluminous amorphous precipitate, which 

 after a short time changes into small colourless or light yellow prisms 

 with wedgeshaped ends. The salt does not lose water at 100°. Heated 

 over a gasburner it gives off violet vapours, turns black and, finally, 

 leaves a cinnamom-coloured residue of an oxiiodide. 



I. 0.5231 gram, treated in the same manner as the iodate, gave 

 0.2931 gram Agi and 0.2064 gram SmaOg. 



II. 0.3812 gram gave 0.2113 gram Agi and 0.1484 gram SragOg. 



In percent: 



I. II. C&U 



Sm^Og 39.46 38.93 174 40.56 



I2O; 43.63 43.16 183 42.66 



H2O (16.91) (17.91) 72 16.78 



429 100.00 

 Spec. Grav: 



0.9834 gram, small crystals, t" 2P.2 sp. Gr. 3.793. 

 Molecular volume: 113.1. 



Sulphate of samarium 



Sm23SO, + 8H,0. 



This compound forms small topas-yellow, well-developed crystals, 

 which are soluble with difficulty in water. The analyses have already 

 been published'). The cr^^stallired salt contains 19.66 percent H2O (calc 

 19.67) and the anhydrous salt 59.19 percent SmgO, (calc 59.18). 



') Journal of the chem. Soc. 1883, p. 365 and 368. 



