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Rubidium hydrate

Rubidium (78 ppm, similar to Ni, Cu, Zn) and caesium (2.6 ppm, similar to Br, Hf, U) are much less abundant than Na and K and have only recently become available in quantity. No purely Rb-containing mineral is known and much of the commercially available material is obtained as a byproduct of lepidolite processing for Li. Caesium occurs as the hydrated aluminosilicate pollucite, Cs4ALiSi9026.H20, but the world s only commercial source is at Bemic Lake,... [Pg.70]

Heats of solution, hydration energies and lattice energies are discussed in reference (77). For oxygen and nitrogen donor atoms, only a few compounds of potassium, rubidium, and caesium are known, but several have been characterised for the smaller cations, sodium and lithium. [Pg.77]

Pt(II) compound reactivation, 37 201 Pt(IV) compound reduction, 37 201 rate-determining step, 37 199-201 tetrachloride, 4 187-188 tetracyanide anions, as one-dimensional electrical conductors, 26 235-268 anion-deficient structures anhydrous compounds, 26 252-254 dimerization, 26 249-251 hydrated derivatives, 26 245-252 physics, 26 260-263 with potassium bromide, 26 248-249 with rubidium chloride, 26 249-250 cation-deficient compounds, 26 244, 254-256... [Pg.243]

As discussed in the previous section, trace elements are essentially retained in the solid combustion products and, because many are present on the surfaces of the particles, they are potentially leachable. Our data show the elements Mo, As, Cu, Zn, Pb, U, Tl, and Se will be readily accessible for leaching. A significant fraction of the V, Cr, and Ni, and a minor proportion of the Ba and Sr will also be potentially leachable because of the surface association, but most of these elements appear to be located in particles and will be released more slowly as the dissolution of the glass and other phases takes place. Rubidium, Y, Zr, Mn, and Nb are contained almost entirely within the particles and dissolution is potentially slower. The extent to which elements are leached also depends on their speciation and solubility in the porewaters, and the pH exerts a major control. In oxidizing solutions, elements such as, Cd, Cu, Mn, Ni, Pb, and Zn form hydrated cations that adsorb onto mineral surfaces at higher pH values and desorb at lower pH values. In contrast, the elements As, U, Mo, Se, and V, under similar Eh conditions, form oxyanions that adsorb onto mineral surfaces at low pH values and desorb at higher values (Jones 1995). [Pg.623]

The electro-affinity of lithium is smaller than that of any of the other alkali metals, and it exhibits a greater tendency than the other alkali metals to form complex salts—e.g. the solubility of ammonia in water is raised by the addition of a lithium salt, which presumably unites with the ammonia the solubility curves of the lithium salts in water usually show more breaks than the corresponding salts of the other alkali metals owing to the formation of hydrates. Potassium, rubidium, and caesium seem to have a smaller and smaller tendency to form complex salts as the at. wt. of the element increases otherwise expressed, the electro-affinity, or the ionization tendency of the alkali metals increases as the at. wt. increases. This is illustrated by the heats of ionization. According to W. Ostwald,27 the heat of ionization per gram-atom iB... [Pg.460]

According to G. Kirchhoff and A. Bunsen, the evaporation of soln. of csesium or rubidium carbonates furnishes crystals of the hydrated salt. G. KirchhofE and R. Bunsen add that the crystals deliquesce rapidly in air, and when heated melt in their water of crystallization, and finally form the anhydrous carbonate as a white pulverulent mass, which rapidly deliquesces in air. The hydrated forms of rubidium and csesium carbonates have not been more closely investigated. [Pg.755]

The terminal numbers with potassium, rubidium, and csesium nitrates represent the b.p. of sat. soln. at nearly normal press. for sodium nitrate the corresponding value is 67 6 (119°). Determinations of the solubility of sodium nitrate have been made by G. J. Mulder, Earl of Berkeley, A. Ditte, L. Maumene, A. fitard, etc.30 The solubility curve of sodium nitrate has been carried upwards 781 (180°), 83 5 (220°), 915 (225°), and 100 (313°), the last-named temp, represents the m.p. of the salt. According to L. C. de Coppet, the eutectic or cryohydric temp, of sodium nitrate is —18"5°, and the eutectic mixture is not a definite hydrate, NaN03.7H20, as A. Ditte once supposed. A. fitard represents the solubility S... [Pg.815]

Rb2HP04, by the interaction of eq. quantities of rubidium hydroxide and ortho-phosphoric acid in cone, aqua ammonia. The resulting precipitate of ammonia rubidium phosphate loses all its combined ammonia in vacuo over sulphuric acid. E. von Berg prepared hydrated dicsesium hydrophosphate, Cs2HP04.H20, in a similar manner. [Pg.853]

The hydrated double oxalate of rubidium and thallium has been formulated as Rb[Tlox2(H20)2]-2H20. Water is lost on heating, and Tl111 undergoes reduction to Tl1, so that final products are Tl1 oxide and Rb2CO3.40°... [Pg.173]


See other pages where Rubidium hydrate is mentioned: [Pg.800]    [Pg.1099]    [Pg.197]    [Pg.1004]    [Pg.800]    [Pg.1099]    [Pg.197]    [Pg.1004]    [Pg.121]    [Pg.301]    [Pg.346]    [Pg.347]    [Pg.19]    [Pg.219]    [Pg.124]    [Pg.121]    [Pg.243]    [Pg.332]    [Pg.30]    [Pg.426]    [Pg.512]    [Pg.546]    [Pg.555]    [Pg.582]    [Pg.601]    [Pg.602]    [Pg.624]    [Pg.625]    [Pg.631]    [Pg.633]    [Pg.638]    [Pg.662]    [Pg.664]    [Pg.668]    [Pg.750]    [Pg.751]    [Pg.818]    [Pg.880]    [Pg.292]    [Pg.1142]    [Pg.42]    [Pg.1360]    [Pg.1362]   
See also in sourсe #XX -- [ Pg.3 , Pg.800 ]




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