REED — RELATION BETWEEN VALENCE .^ ATOMIC WEIGHT. 66 1 



Sd^iSO^)-,, antimonious sulphate, 

 S60CI, antimonjl monochloride. 



JVote.—Most thio-antimonites are 

 found native, such as 



FeS^aSi, berthierite, 

 CmjS^jS,, wolfsbergite, 

 P/>Si>^S^, boulangerite, 

 Pd^Sd.^S^, bleinierite, 

 (C«2P3).,S^2S6j bournanite, 

 A^i^Sb^Sf,, freislebenite, 

 A^gSi.jS,;, pyrargjrite, 

 &c., &c. 



S^ is 4- 4 in 

 SdoO ^ and all hjpo-antimonates. 



S3 is 4-5 in 

 Si^jOs and all antimonates, 

 Si^gSs and all thio-antimonates, 

 Si^jS^s and all seleno-antimonates, 

 SiJF,, antimonic fluoride, 

 S^C/s, " chloride, 



SdOCl^, antimonyl trichloride. 



IODINE. 



Atomic weight 126.557 ± ^•^^' 



I is — I in 

 HI and all iodides. 



I is -|- I in 

 ICl, iodine monochloride. 



I is -f 3 in 

 IC/3, iodine trichloride. 



I is +5 in 

 IIIO3 and all iodalts. 



I is -|- 7 in 

 Hr,IOg and all periodates. 



TELLURIUM. 



Atomic weight 127.96 ± -034. 



Te is — 2 in 

 lIjTe and all tellurides. 



Te is + 2 in 

 TeCl^, tellurium dichloride, 

 TeB^2) " dibromide, 



T«I,, " di-iodide 



Te is -|- 4 in 

 TeOa and all tellurites, 

 TeSa and all thio-tellurites, 

 TeF4, tellurium tetrafluoride, 

 TeCl^, " tetrachloride, 

 TeBr^, " tetrabromide, 

 Tel^\ " tetraiodide. 



Te is +6 in 

 TeOg and all tellurates, 

 TeS;^, and all thio tellurates. 



Atomic weight 132.583 i .024. 

 C5 is -(- I in 

 C5OH and all csesic salts. 



BARIUM. 



Atomic weight 136.763 ± .031. 



Ba is + 2 in 

 BaO and all baric salts. 



Ba is -|- 4 in 

 BflO^, barium dioxide. 



LANTHANUM. 



Atomic weight 139.0.* 



La is + 3 in 

 L^jOj and all lanthanic salts. 



CERIUM. 



Atomic weight 140.! 

 Cc is -}- 3 in 

 CcjOg and all cerous salts, 

 CC2S3, cerous sulphide. 

 Ce is -I-4 in 

 CcOo and all eerie salts . 



DIDYMIUM. 



Atomic weight about 140. 

 This metal has recently been se- 

 parated by Welsbach into jieodym 

 and fraseodym. See Chem. Netvs, 

 vol. 52, p. 49. 



SAMARIUM. 



Atomic weight about 150. 



* Cleve, K. Svenska. Vet. Akad. Handlingar^ Bd. 2, no. 7, 1874. 

 t Robinson, Chem. News, vol. 50, p. 25:. 



