A grey film is produced on the surface of the copper, probably due to the formation of a copper arsenide.
An antimony phosphide and arsenide are known, as is also a thiophosphate, SbPS 4, which is prepared by heating together antimony trichloride and phosphorus pentasulphide.
Arsenic trihydride (arsine or arseniuretted hydrogen), AsH3, is formed by decomposing zinc arsenide with dilute sulphuric acid; by the action of nascent hydrogen on arsenious compounds, and by the electrolysis of solutions of arsenious and arsenic acids; it is also a product of the action of organic matter on many arsenic compounds.
For example, an extremely thin layer of gallium arsenide can be sandwiched between two layers of aluminum gallium arsenide.
He also studied the magnetic and thermo-electric properties, and the resistance of short rods of manganese arsenide.
In modulation doping, facing layers of gallium arsenide and aluminum gallium arsenide squeeze electrons into an essentially two-dimensional electron gas, or 2DEG.
It occurs in the uncombined condition and alloyed with iron in meteorites; as sulphide in millerite and nickel blende, as arsenide in niccolite and cloanthite, and frequently in combination with arsenic and antimony in the form of complex sulphides.
The presence in a metal of even small proportions of arsenide generally leads to considerable deterioration in mechanical qualities.
This " time out " allows the gallium arsenide laser diode time to cool off.