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1. Analytische Physik und Chemie des Rheniums

Author

E. Broch, W. Schröter, E. Lindberg, W. Meissner, D. Kovač, B. Voigt, W. F. Meggers, I. Wennerlöf, Ida Noddack, F. Machatschki, Percy Lucock Robinson, Henry Vincent Aird Briscoe, H. Alterthum, N. A. Puschin, W. H. Albrecht, E. Wedekind, W. Michael, G. Heyne, W. A. Roth, O. Berg, R. Lorenz, U. A. Lehrer, P. S. Tutundžič, H. Beuthe, H. F. Kurtz, L. Holborn, A. J. Rudge, M. Pirani, W. Meidinger, Ch. A. Kraus, W. Feit, G. Becker, W. Biltz, K. Becker, K. Moers, V. M. Goldschmidt, F. Kohlrausch, Walter Noddack, and C. Agte

Subjects
Engineering, Polymer science, business.industry, Analytical Chemistry (journal), business, Biochemistry, Analytical Chemistry
Published
1932
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10. A revision of the atomic weight of thallium

Author

Henry Vincent Aird Briscoe, Suetaro Kikuchi, and John Buttery Peel

Subjects
chemistry, medicine, Halide, Thallium, chemistry.chemical_element, Thermodynamics, Titration, General Medicine, Heavy element, Chloride, Atomic mass, medicine.drug, Mathematics
Abstract

Since T. W. Richards in 1888 first devised the method of nephelometric titration and applied it to the precise determination of the ratios of soluble halides to silver, it has been the mainstay of atomic weight determinations in all countries. This is proof enough of the great advance he thus made in the accurate measurement of the fundamental ratios of chemistry. Yet, valuable as the method of nephelometric titration has been, it is, as many who have used it will admit, both extremely tedious and liable to uncertainties much greater than would appear from the results which are published. Despite the most careful observance of the conditions laid down by Richards and subsequent workers, it is a common experience to find that even after standing for the normal time, 7-14 days, a liquor showing on the first test approximate equivalence of silver and chloride, will, on adding small quantities of precipitant behave quite erratically, so that in extreme cases addition of chloride may, in subsequent tests, produce apparently an increase in dissolved silver, and vice versa. Thus, even where nephelometric tests proceed normally, there is always a fear that apparent equivalence of silver and halide may be illusory; and a considerable experience of such tests has given us the impression that in a normal titration, involving 5-10 grams of silver in, say, 4-6 litres of solution, the resulting uncertainty in the weight of silver is of the order of 0•0005-0•0002 gm. It is, further, no slight disadvantage that a nephelometric titration can hardly be completed in less than 2 1/2-3 weeks and usually extends over a period of 4-6 weeks. One of the principal objects of the present work has been, therefore, to devise and test a method of titrating halides with silver which shall be more rapid and precise. A good trial of any such method is afforded by the determination of the atomic weight of a heavy element of small valency, for which, evidently, the ratio of the halide to silver is unfavourable to the attainment of precise results. It was in part for this reason that the case of thallium was chosen. Apart from any question of method, moreover, there was good reason for a new determination of this atomic weight.

Published
1931
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12. X.—Carbon sulphidoselenide

Author

Percy Lucock Robinson, Henry Vincent Aird Briscoe, and John Buttery Peel

Subjects
Chemical engineering, Chemistry, chemistry.chemical_element, Carbon
Published
1929
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30. CCCCXLVIII.—Potassium rheni-iodide

Author

Percy Lucock Robinson, Henry Vincent Aird Briscoe, and Alfred John Rudge

Subjects
chemistry.chemical_classification, chemistry, Potassium, Iodide, chemistry.chemical_element, Nuclear chemistry
Published
1931
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34. Notes

Author

Frank Bell, Joseph Kenyon, Henry Vincent Aird Briscoe, Percy Lucock Robinson, George Edward Stephenson, Frederick Alfred Mason, Ellen Susan Hill, Reginald Child, Samuel Smiles, Leonard Alfred Sayce, Ronald Rumsey Widdowson, Spencer Robert Humby, Michael Willcox Perrin, and Ruth Sugden

Published
1926
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35. The Highest Oxide of Rhenium

Author

A. J. Rudge, Henry Vincent Aird Briscoe, and Percy Lucock Robinson

Subjects
chemistry.chemical_compound, Potassium permanganate, Multidisciplinary, chemistry, Inorganic chemistry, Oxide, Melting point, chemistry.chemical_element, Rhenium, Oxygen
Abstract

IN the course of an investigation of the oxides of rhenium in progress in these laboratories, we have sought to repeat the preparation of the highest oxide described by I. and W. Noddack,1 Re2O8, which was obtained by them on heating the heptoxide below 150° in a stream of oxygen. The yellow heptoxide used in the Noddacks' preparations melted at 220° and gave rise to a white sublimate at 150° described as Re2O8 and possessing the property of decolorising acidified potassium permanganate. The melting point of our specimens of heptoxide has invariably been about 300°,2 and this material failed to give any evidence of a white sublimate when heated in a stream of oxygen to temperatures below its melting point. Moreover, quantitative experiments repeatedly showed that its formation was unattended by any increase in weight. The sublimate was identical in crystalline form with the heptoxide, was decidedly yellow, and melted to a yellow solid, also indistinguishable from the heptoxide.

Published
1932
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36. 400. The parachor of rhenium

Author

Alfred John Rudge, Henry Vincent Aird Briscoe, and Percy Lucock Robinson

Subjects
Chemistry, chemistry.chemical_element, Organic chemistry, Parachor, Rhenium
Published
1932
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37. Notes

Author

Henry Vincent Aird Briscoe, John Buttery Peel, Percy Lucock Robinson, Kenneth Norman Welch, George Roger Clemo, and Wallace Frank Short

Published
1928
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38. 141. Rhenium oxychloride

Author

Percy Lucock Robinson, Henry Vincent Aird Briscoe, and Alfred John Rudge

Subjects
chemistry, chemistry.chemical_element, Rhenium, Nuclear chemistry
Published
1932
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