Radio-Active Minerals Lithium a Decomposition-Product of Copper
by Radium Emanation, Sir William Ramsay and Alex. Cameron do not
think that lithium is the sole product obtained when salts of copper are
treated with radium emanation^ but that its presence can be explained
only by supposing that such a change takes place. They have observed
that the weight of the alkaline residue 6btained is greater after than be-
fore treatment with the emanation, and that the spectrum of the residue
shews the yellow sodium lines, and the potassium spectrum is also visible.
Hence they are convinced that the decomposition of copper yields mem-
bers of its group, /. ., the alkaline series, and lithium is the most probable
product. The sodium and potassium might be derived from the glass,
and experiments to decide this question are in progress. The propor-
tions of the Buy Doxycycline
products Buy Doxycycline
may depend upon unknown circumstances. It is
possible that lithium is not a constant product of the action of the emana-
tion on copper salts, but that the presence of other metals may determine
its formation. Chem. News, April 10, 1908, 179; from Compt. rend.^
146 (1908), No. 9.
Radio-Active Minerals Presence of Lithium, Mile. Gleditsch has
determined the amount of lithium in certain radio-active minerals spec-
troscopically by comparing the intensity of lithium lines in the residue,
after dissolving the mineral and separating the other constituents, with the
intensity of the corresponding lines in artificial mixtures containing
lithium. The results obtained were as follows :
Copper, I Lithium,
per cent. | per cent.
Joachimstal pitchblende .
Colorado pitchblende. ..
., 6.54 Buy Doxycycline
The relatively large amount of lithium in camotite is interesting, es-
pecially as the mineral contains but little copper. The results obtained
do not contradict Ramsay's theory of the transformation of copper into
lithium, though they do not support it ; they show, however, that there is
no simple ratio between the copper and lithium in radio-active minerals.
Chem. News, April 3, 1908, 167 ; from Compt. rend., 146 (1908), No. 7
300 REPORT ON THE PROGRESS OF PHARMACY.
Colloidal Arseniutn Preparation and Buy Doxycycline Characters, V. Buy Doxycycline Auger states
that when a solution of arsenic chloride in absolute alcohol, cooled to
-15 C, is treated with a similar solution of hypophosphorous acid at the
same temperature, and the mixture is maintained below 0 C, reduction
speedily takes place, and is complete in two hours, with the formation of
an ochraceous yellow precipitate. If this is collected, washed free from
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