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Boron concentration, water-glass

Lead borate moaohydrate [14720-53-7] (lead metaborate), Pb(B02)2 H20, mol wt 310.82, d = 5.6g/cm (anhydrous) is a white crystalline powder. The metaborate loses water of crystallization at 160°C and melts at 500°C. It is iasoluble ia water and alkaHes, but readily soluble ia nitric and hot acetic acid. Lead metaborate may be produced by a fusion of boric acid with lead carbonate or litharge. It also may be formed as a precipitate when a concentrated solution of lead nitrate is mixed with an excess of borax. The oxides of lead and boron are miscible and form clear lead-borate glasses in the range of 21 to 73 mol % PbO. [Pg.72]

See other pages where Boron concentration, water-glass is mentioned: [Pg.348]    [Pg.98]    [Pg.73]    [Pg.156]    [Pg.131]    [Pg.75]    [Pg.81]    [Pg.355]    [Pg.483]    [Pg.484]    [Pg.134]    [Pg.275]    [Pg.239]    [Pg.841]    [Pg.4840]    [Pg.2518]    [Pg.834]    [Pg.329]    [Pg.202]    [Pg.540]    [Pg.299]    [Pg.80]   


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