191 



TRIAD METALS. 



THALLIUM. Tl. 



245. METALLIC. 



t a. Fused in a hermetically sealed tube, to show the 

 silvery metallic lustre. 



246. ACETATE. T1C 2 H 3 2 . 



t a. In pearly crystalline lumps. 



247. ANTIMONIATE. TlSb 2 6 . (Antimoniate of Thallium.) 



t a. White powder. 



248. BENZOATE. T1C 7 H 5 2 . 



f a. White crystalline laminae. 



249. BROMIDE. Tl Br. 



t a. Pale yellowish- white powder. 



250. CARBONATE. T1C0 3 . 



t a. Dirty-white laminated crystals. 



251. CHROMATK. Tl 2 Cr0 4 . 



f a. Yellow powder. 



252. BICHROMATE. Tl 3 Cr0 4 Cr0 3 . 



f a. Orange-yellow powder. 



253. CHLORATE. T1C10 3 . 



t a. White crystalline powder. 



254. CHLORIDE. Tl Cl. 



t a. White powder. 



255. SESQUICHLORIDE. T1 4 C1 6 . 



f a. Minute sulphur-coloured crystalline scales. 



256. PLATING-CHLORIDE. 2TlCl,PtCl 4 . 



f a. Buff-coloured powder. 



257. IODIDE. TIL 



t a. Sulphur-coloured powder. 



258. MOLTBDATE. Tl 2 Mo0 4 . 



t a. White powder. 



259. NITRATE. T1NO 3 . 



t a. Small white shining prismatic crystals. 



260. OXALATE. T1 2 C 2 4 . 



t a. White shining acicular crystals. 



261. PEROXIDE. T1 3 O 3 . 



f a. Puce-coloured powder. 



t 6. Ditto, impure. 



Note. Specimen b consists of the " flue dust," obtained in roasting 

 thalliferouB iron pyrites, containing from one-sixth to eight per cent, of 

 the metal. See Watts, Diet. Chem., vol. v., p. 742. 



