LXVII.—The behaviour of alloys when heated in a vacuum

Groves, Clarence Richard; Turner, Thomas

doi:10.1039/ct9120100585

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“…respectively by distillation at 1100 under a pressure of I mm. 63 The crystalline compounds Cd 2 Pt and Mg 2 Pt were also obtained by removing the excess of volatile metal by distillation. 64 The treatment of alloys with chemical reagents for the purpose of removing an excess of one component, leaving a residue of the intermetallic compound, has been adopted very frequently, and has obtained an undeserved confidence, which is only gradually disappearing before criticisms grounded on the doctrine of phases.…”

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2.4 Intermetallic compounds

Janka¹,

Pöttgen²

2020

Rare Earth Chemistry

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This plan was adopted by many other investigators, most of whom employed amalgams, on account of their low meltingpoint and the consequent facility of handling. The validity of this method is discussed below (p. 27). Calvert and Johnson 9 attempted in the same way to isolate the chemical compounds which they assumed to be present in alloys, accompanied by an excess of one or the other component, but their later work 10 opened up a more fruitful field of investigation. By determining the values of certain physical constants, such as the thermal and electrical conductivity, hardness, and specific gravity of a number of alloys in a given series, and observing the manner in which the property selected varied with the composition of the alloys, they established the fact that discontinuities occur, which were rightly attributed to the presence of intermetallic compounds. The same course was followed, with important results, by Matthiessen and his collaborators, whose very extensive and accurate determinations of many of the physU cal properties of alloys placed the subject on a new basis. 11 The It is also shown that the systematic investigation of certain properties, especially of the electrical conductivity and the thermo-electric power, affords the most delicate means in * The practical methods employed in investigations of this kind are described in the author's " Metallography " (Text-Books of Physical Chemistry, ed. Sir W. Ramsay. 2nd edn. London, 1913).

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2.4 Intermetallic compounds

Janka¹,

Pöttgen²

2020

Rare Earth Chemistry

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Experimentelle anorganische Chemie und Elektrochemie im Jahre 1912

Gutbier¹

1913

Angewandte Chemie

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Atomgewichte. Der J a h r e s b e r i c h t d e r i n t e r n a t i o n a 1 e r A t o m g e w i c h t s k o m m i s s i o n f u r 1913 ist in dieser Z. bereits am 6./12. 1912 veroffentlicht worden2) Die Kommission schlagt fur 1913 nur eine Anderung in der Tabelle vor, namlich die Einfugung von H o 1 m i u m fur welches bisher noch keine zuverlassige Atomgewichtsbestimmung vorlag, und fur welches 0 t t o H 0.1 m b e r g 31 nach dem bekannten Sulfatverfahren im Mittel den Wert 163,45 gefunden hat. Holmium hat infolgedessen mit dem Atomgewicht Ho = 163,5 einen Platz in der internationalen Tabelle gefunden, die sonst vollstandig mit derjenigen vom Jahre 1912 ubereinstimmt. Es ist noch darauf aufmerksam zu machen, daB auf den BeschluB des 8. Internationalen Kongresses4) hin fur k o m m e r z i e 11 e Z w e c k e die Atomgewichtstabelle fur 1912 als Norm bis zur Tagung des 9. Internationalen Kongresses angenommen worden ist. Elemente.Von den zahlreichen, im Jahre 1912 auf diesem Gebiete mitgeteilten Untersuchungen6) konnen nur die folgenden kurz besprochen werden.

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A distillation method for the rapid determination of the volatile constituents of small samples of copper-zinc alloys

Weinstein

Benedetti-Pichler

1932

Mikrochemie

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LXVII.—The behaviour of alloys when heated in a vacuum

Cited by 3 publications

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2.4 Intermetallic compounds

2.4 Intermetallic compounds

Experimentelle anorganische Chemie und Elektrochemie im Jahre 1912

A distillation method for the rapid determination of the volatile constituents of small samples of copper-zinc alloys

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