Nach dem aluminothermischen Verfahren wurden die Boride Mo7Al6B7 and WB2 hergestellt. Die Abmessungen der Elementarkörper und die Dichten
dieser Substanzen werden angegeben.
I n the binary system PbO-Laz03 only one compound, 4 P b 0 .Laz03, exists ; it is flanked by two eutectics. The structure of the compound, although of lower symmetry, is intimately related to the C modification of the rare earths. Below 800' to lOOO"C, metastable solid solutions are formed from oxide mixtures coprecipitated from mixed solutions of the nitrates, the cubic parameter a = 5.66 A, if extrapolated to pure LazO3, corresponding to half the a parameter of t h e C form of Laa03. The solid solutions existing between the compositions Laz03-2Pb0 and pure Laa03 have a cubic face-centered lattice and obey Vegard's rule. The systems of P b O with S m a 0 3 and Gdz08 are quite similar to that with Laz03. The compound S m 2 O 3 . 4 P b 0 decomposes at 1000°C with evaporation of PbO ; S m z 0 3 remains in the B modification.
Abstract1. Die Sauerstoffpartialdrucke des Kupferoxyduls (gegenüber Cu) wurden in Anschluß an eine Arbeit von ISHIKAWA und KIMURA neu berechnet; sie liegen wesentlich niedriger als die des CuO (gegenüber Cu2O) bei derselben Temperatur.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.