Density beryllium compounds

The physicochemical properties of beryllium compounds and alloys have been reviewed subjects include phase diagrams, crystal structure, and density data on alloys and compounds, with a special section devoted entirely to halides and chalcogenides. ... 

BERYLLIUM OXIDE. BeO. (Beryllia.) M.p. 2650°C density 3.03 g/cm. Beryllium compounds are toxic and shonld be used... 

In its general corrosion behaviour, beryllium exhibits characteristics very similar to those of aluminium. Like aluminium, the film-free metal is highly active and readily attacked in many environments. Beryllium oxide, however, like alumina, is, a very stable compound (standard free energy of formation = —579kJ/mol), with a bulk density of 3-025g/cm as compared with 1 -85 g/cm for the pure metal, and with a high electronic resistivity of about 10 flcm at 0°C. In fact, when formed, the oxide confers the same type of spurious nobility on beryllium as is found, for example, with aluminium, titanium and zirconium. 

The crystal structure of beryllium carbide is cubic, density = 2.44 g/mL. The melting point is 2250—2400°C and the compound dissociates under vacuum at 2100°C (1). This compound is not used industrially, but Be2C is a potential first-wall material for fusion reactors, one on the very limited list of possible candidates (see Fusion energy). 

Beryllium is the first element in the alkaline earth metals group, sitting to the right of the alkali metal lithium. In its pure form, this metal is rather hard and has a gray-white appearance. Of all of the metals, beryllium has the lowest density. It is also relatively rare. Although compounds and minerals containing beryllium are found... 

Johann Heinrich Biltz (Berlin, 26 May 1865-Breslau, 29 October or 2 November 1943), a pupil of Victor Meyer, professor in Breslau (1911), determined the vapour densities of stannous chloride, cuprous and silver chlorides, phosphorus, sulphur, selenium, tin, arsenic, antimony and bismuth, detecting the molecule Sg. His later work was largely on organic chemistry. His brother Eugen Wilhelm Biltz (Berlin, 8 March 1877-Heidelberg, 13 November 1943) was professor in Gottingen (1900), Clausthal (1908), and Hannover. He published an immense number of papers, on colloids, the conductivities of fused salts, the compounds of ammonia with salts, compounds of beryllium and other rarer metals, sulphides, phosphides and tellurides, etc., and the molecular volumes of solid compounds. ... 

To assure that the analysis would suffice for other compounds of uranium (excluding beryllium and deuterium), graphite at 1.9 g/cm was inserted into the reduced-density dry UO loadings which demonstrated the largest increase in array reactivity. 

Beryllium, Group 2A(2) Be displays even more anomalous behavior than Li. Because of the extremely high charge density of Be +, the discrete ion does not exist, and all Be compounds exhibit covalent bonding. 

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